图片调整，暗黑模式屏蔽，加入防闪退代码

2019-11-11 17:59:53 +08:00
parent 27ddecac30
commit 1448a02de0
30 changed files with 1747 additions and 3 deletions
@@ -0,0 +1,86 @@
+//
+//  AvoidCrash.h
+//  AvoidCrash
+//
+//  Created by mac on 16/9/21.
+//  Copyright © 2016年 chenfanfang. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+#import <objc/runtime.h>
+
+//category
+#import "NSObject+AvoidCrash.h"
+
+#import "NSArray+AvoidCrash.h"
+#import "NSMutableArray+AvoidCrash.h"
+
+#import "NSDictionary+AvoidCrash.h"
+#import "NSMutableDictionary+AvoidCrash.h"
+
+#import "NSString+AvoidCrash.h"
+#import "NSMutableString+AvoidCrash.h"
+
+#import "NSAttributedString+AvoidCrash.h"
+#import "NSMutableAttributedString+AvoidCrash.h"
+
+
+/**
+ *  if you want to get the reason that can cause crash, you can add observer notification in AppDelegate.
+ *  for example: 
+ *
+ *  [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(dealwithCrashMessage:) name:AvoidCrashNotification object:nil];
+ *  
+ *  ===========================================================================
+ *  
+ *  你如果想要得到导致崩溃的原因，你可以在AppDelegate中监听通知，代码如上。
+ *  不管你在哪个线程导致的crash,监听通知的方法都会在主线程中
+ *
+ */
+#define AvoidCrashNotification @"AvoidCrashNotification"
+
+
+
+//user can ignore below define
+#define AvoidCrashDefaultReturnNil  @"This framework default is to return nil to avoid crash."
+#define AvoidCrashDefaultIgnore     @"This framework default is to ignore this operation to avoid crash."
+
+
+#ifdef DEBUG
+
+#define  AvoidCrashLog(...) NSLog(@"%@",[NSString stringWithFormat:__VA_ARGS__])
+
+#else
+
+#define AvoidCrashLog(...)
+#endif
+
+
+@interface AvoidCrash : NSObject
+
+
+/**
+ *  become effective . You can call becomeEffective method in AppDelegate didFinishLaunchingWithOptions
+ *  
+ *  开始生效.你可以在AppDelegate的didFinishLaunchingWithOptions方法中调用becomeEffective方法
+ *
+ *  这是全局生效，若你只需要部分生效，你可以单个进行处理，比如:
+ *  [NSArray avoidCrashExchangeMethod];
+ *  [NSMutableArray avoidCrashExchangeMethod];
+ *  .................
+ *  .................
+ */
+ (void)becomeEffective;
+
+
+//user can ignore below method <用户可以忽略以下方法>
+
+
+ (void)exchangeClassMethod:(Class)anClass method1Sel:(SEL)method1Sel method2Sel:(SEL)method2Sel;
+
+ (void)exchangeInstanceMethod:(Class)anClass method1Sel:(SEL)method1Sel method2Sel:(SEL)method2Sel;
+
+ (void)noteErrorWithException:(NSException *)exception defaultToDo:(NSString *)defaultToDo;
+
+
+@end
@@ -0,0 +1,200 @@
+//
+//  AvoidCrash.m
+//  AvoidCrash
+//
+//  Created by mac on 16/9/21.
+//  Copyright © 2016年 chenfanfang. All rights reserved.
+//
+
+#import "AvoidCrash.h"
+
+
+#define AvoidCrashSeparator         @"================================================================"
+#define AvoidCrashSeparatorWithFlag @"========================AvoidCrash Log=========================="
+
+#define key_errorName        @"errorName"
+#define key_errorReason      @"errorReason"
+#define key_errorPlace       @"errorPlace"
+#define key_defaultToDo      @"defaultToDo"
+#define key_callStackSymbols @"callStackSymbols"
+#define key_exception        @"exception"
+
+
+@implementation AvoidCrash
+
+/**
+ *  开始生效(进行方法的交换)
+ */
+ (void)becomeEffective {
+    
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+        
+        [NSObject avoidCrashExchangeMethod];
+        
+        [NSArray avoidCrashExchangeMethod];
+        [NSMutableArray avoidCrashExchangeMethod];
+        
+        [NSDictionary avoidCrashExchangeMethod];
+        [NSMutableDictionary avoidCrashExchangeMethod];
+        
+        [NSString avoidCrashExchangeMethod];
+        [NSMutableString avoidCrashExchangeMethod];
+        
+        [NSAttributedString avoidCrashExchangeMethod];
+        [NSMutableAttributedString avoidCrashExchangeMethod];
+    });
+}
+
+/**
+ *  类方法的交换
+ *
+ *  @param anClass    哪个类
+ *  @param method1Sel 方法1
+ *  @param method2Sel 方法2
+ */
+ (void)exchangeClassMethod:(Class)anClass method1Sel:(SEL)method1Sel method2Sel:(SEL)method2Sel {
+    Method method1 = class_getClassMethod(anClass, method1Sel);
+    Method method2 = class_getClassMethod(anClass, method2Sel);
+    method_exchangeImplementations(method1, method2);
+}
+
+
+/**
+ *  对象方法的交换
+ *
+ *  @param anClass    哪个类
+ *  @param method1Sel 方法1(原本的方法)
+ *  @param method2Sel 方法2(要替换成的方法)
+ */
+ (void)exchangeInstanceMethod:(Class)anClass method1Sel:(SEL)method1Sel method2Sel:(SEL)method2Sel {
+    
+    
+    Method originalMethod = class_getInstanceMethod(anClass, method1Sel);
+    Method swizzledMethod = class_getInstanceMethod(anClass, method2Sel);
+    
+    BOOL didAddMethod =
+    class_addMethod(anClass,
+                    method1Sel,
+                    method_getImplementation(swizzledMethod),
+                    method_getTypeEncoding(swizzledMethod));
+    
+    if (didAddMethod) {
+        class_replaceMethod(anClass,
+                            method2Sel,
+                            method_getImplementation(originalMethod),
+                            method_getTypeEncoding(originalMethod));
+    }
+    
+    else {
+        method_exchangeImplementations(originalMethod, swizzledMethod);
+    }
+    
+}
+
+
+
+/**
+ *  获取堆栈主要崩溃精简化的信息<根据正则表达式匹配出来>
+ *
+ *  @param callStackSymbolStr 堆栈主要崩溃信息
+ *
+ *  @return 堆栈主要崩溃精简化的信息
+ */
+
+ (NSString *)getMainCallStackSymbolMessageWithCallStackSymbols:(NSArray<NSString *> *)callStackSymbols {
+    
+    //mainCallStackSymbolMsg的格式为   +[类名 方法名]  或者 -[类名 方法名]
+    __block NSString *mainCallStackSymbolMsg = nil;
+    
+    //匹配出来的格式为 +[类名 方法名]  或者 -[类名 方法名]
+    NSString *regularExpStr = @"[-\\+]\\[.+\\]";
+    
+    
+    NSRegularExpression *regularExp = [[NSRegularExpression alloc] initWithPattern:regularExpStr options:NSRegularExpressionCaseInsensitive error:nil];
+    
+    
+    for (int index = 2; index < callStackSymbols.count; index++) {
+        NSString *callStackSymbol = callStackSymbols[index];
+        
+        [regularExp enumerateMatchesInString:callStackSymbol options:NSMatchingReportProgress range:NSMakeRange(0, callStackSymbol.length) usingBlock:^(NSTextCheckingResult * _Nullable result, NSMatchingFlags flags, BOOL * _Nonnull stop) {
+            if (result) {
+                NSString* tempCallStackSymbolMsg = [callStackSymbol substringWithRange:result.range];
+                
+                //get className
+                NSString *className = [tempCallStackSymbolMsg componentsSeparatedByString:@" "].firstObject;
+                className = [className componentsSeparatedByString:@"["].lastObject;
+                
+                NSBundle *bundle = [NSBundle bundleForClass:NSClassFromString(className)];
+                
+                //filter category and system class
+                if (![className hasSuffix:@")"] && bundle == [NSBundle mainBundle]) {
+                    mainCallStackSymbolMsg = tempCallStackSymbolMsg;
+                    
+                }
+                *stop = YES;
+            }
+        }];
+        
+        if (mainCallStackSymbolMsg.length) {
+            break;
+        }
+    }
+    
+    return mainCallStackSymbolMsg;
+}
+
+
+/**
+ *  提示崩溃的信息(控制台输出、通知)
+ *
+ *  @param exception   捕获到的异常
+ *  @param defaultToDo 这个框架里默认的做法
+ */
+ (void)noteErrorWithException:(NSException *)exception defaultToDo:(NSString *)defaultToDo {
+
+    //堆栈数据
+    NSArray *callStackSymbolsArr = [NSThread callStackSymbols];
+    
+    //获取在哪个类的哪个方法中实例化的数组  字符串格式 -[类名 方法名]  或者 +[类名 方法名]
+    NSString *mainCallStackSymbolMsg = [AvoidCrash getMainCallStackSymbolMessageWithCallStackSymbols:callStackSymbolsArr];
+    
+    if (mainCallStackSymbolMsg == nil) {
+        
+        mainCallStackSymbolMsg = @"崩溃方法定位失败,请您查看函数调用栈来排查错误原因";
+        
+    }
+    
+    NSString *errorName = exception.name;
+    NSString *errorReason = exception.reason;
+    //errorReason 可能为 -[__NSCFConstantString avoidCrashCharacterAtIndex:]: Range or index out of bounds
+    //将avoidCrash去掉
+    errorReason = [errorReason stringByReplacingOccurrencesOfString:@"avoidCrash" withString:@""];
+    
+    NSString *errorPlace = [NSString stringWithFormat:@"Error Place:%@",mainCallStackSymbolMsg];
+    
+    NSString *logErrorMessage = [NSString stringWithFormat:@"\n\n%@\n\n%@\n%@\n%@\n%@\n\n%@\n\n",AvoidCrashSeparatorWithFlag, errorName, errorReason, errorPlace, defaultToDo, AvoidCrashSeparator];
+    AvoidCrashLog(@"%@",logErrorMessage);
+    
+    //请忽略下面的赋值，目的只是为了能顺利上传cocoapods
+    logErrorMessage = logErrorMessage;
+    
+    NSDictionary *errorInfoDic = @{
+                                   key_errorName        : errorName,
+                                   key_errorReason      : errorReason,
+                                   key_errorPlace       : errorPlace,
+                                   key_defaultToDo      : defaultToDo,
+                                   key_exception        : exception,
+                                   key_callStackSymbols : callStackSymbolsArr
+                                   };
+    
+    //将错误信息放在字典里，用通知的形式发送出去
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [[NSNotificationCenter defaultCenter] postNotificationName:AvoidCrashNotification object:nil userInfo:errorInfoDic];
+    });
+    
+    
+}
+
+
+@end
@@ -0,0 +1,25 @@
+//
+//  NSArray+AvoidCrash.h
+//  AvoidCrash
+//
+//  Created by mac on 16/9/21.
+//  Copyright © 2016年 chenfanfang. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@interface NSArray (AvoidCrash)
+
+ (void)avoidCrashExchangeMethod;
+
+@end
+
+
+/**
+ *  Can avoid crash method
+ *
+ *  1. NSArray的快速创建方式 NSArray *array = @[@"chenfanfang", @"AvoidCrash"];  //这种创建方式其实调用的是2中的方法
+ *  2. +(instancetype)arrayWithObjects:(const id  _Nonnull __unsafe_unretained *)objects count:(NSUInteger)cnt
+ *  3. - (id)objectAtIndex:(NSUInteger)index
+ *  4. - (void)getObjects:(__unsafe_unretained id  _Nonnull *)objects range:(NSRange)range
+ */    
@@ -0,0 +1,253 @@
+//
+//  NSArray+AvoidCrash.m
+//  AvoidCrash
+//
+//  Created by mac on 16/9/21.
+//  Copyright © 2016年 chenfanfang. All rights reserved.
+//
+
+#import "NSArray+AvoidCrash.h"
+
+#import "AvoidCrash.h"
+
+@implementation NSArray (AvoidCrash)
+
+
+ (void)avoidCrashExchangeMethod {
+    
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+        //=================
+        //   class method
+        //=================
+        
+        //instance array method exchange
+        [AvoidCrash exchangeClassMethod:[self class] method1Sel:@selector(arrayWithObjects:count:) method2Sel:@selector(AvoidCrashArrayWithObjects:count:)];
+        
+        
+        
+        //====================
+        //   instance method
+        //====================
+        
+        Class __NSArray = NSClassFromString(@"NSArray");
+        Class __NSArrayI = NSClassFromString(@"__NSArrayI");
+        Class __NSSingleObjectArrayI = NSClassFromString(@"__NSSingleObjectArrayI");
+        Class __NSArray0 = NSClassFromString(@"__NSArray0");
+        
+        
+        //objectsAtIndexes:
+        [AvoidCrash exchangeInstanceMethod:__NSArray method1Sel:@selector(objectsAtIndexes:) method2Sel:@selector(avoidCrashObjectsAtIndexes:)];
+        
+        
+        //objectAtIndex:
+        
+        [AvoidCrash exchangeInstanceMethod:__NSArrayI method1Sel:@selector(objectAtIndex:) method2Sel:@selector(__NSArrayIAvoidCrashObjectAtIndex:)];
+        
+        [AvoidCrash exchangeInstanceMethod:__NSSingleObjectArrayI method1Sel:@selector(objectAtIndex:) method2Sel:@selector(__NSSingleObjectArrayIAvoidCrashObjectAtIndex:)];
+        
+        [AvoidCrash exchangeInstanceMethod:__NSArray0 method1Sel:@selector(objectAtIndex:) method2Sel:@selector(__NSArray0AvoidCrashObjectAtIndex:)];
+        
+        
+        //getObjects:range:
+        [AvoidCrash exchangeInstanceMethod:__NSArray method1Sel:@selector(getObjects:range:) method2Sel:@selector(NSArrayAvoidCrashGetObjects:range:)];
+        
+        [AvoidCrash exchangeInstanceMethod:__NSSingleObjectArrayI method1Sel:@selector(getObjects:range:) method2Sel:@selector(__NSSingleObjectArrayIAvoidCrashGetObjects:range:)];
+        
+        [AvoidCrash exchangeInstanceMethod:__NSArrayI method1Sel:@selector(getObjects:range:) method2Sel:@selector(__NSArrayIAvoidCrashGetObjects:range:)];
+    });
+    
+    
+}
+
+
+//=================================================================
+//                        instance array
+//=================================================================
+#pragma mark - instance array
+
+
+ (instancetype)AvoidCrashArrayWithObjects:(const id  _Nonnull __unsafe_unretained *)objects count:(NSUInteger)cnt {
+    
+    id instance = nil;
+    
+    @try {
+        instance = [self AvoidCrashArrayWithObjects:objects count:cnt];
+    }
+    @catch (NSException *exception) {
+        
+        NSString *defaultToDo = @"This framework default is to remove nil object and instance a array.";
+        [AvoidCrash noteErrorWithException:exception defaultToDo:defaultToDo];
+        
+        //以下是对错误数据的处理，把为nil的数据去掉,然后初始化数组
+        NSInteger newObjsIndex = 0;
+        id  _Nonnull __unsafe_unretained newObjects[cnt];
+        
+        for (int i = 0; i < cnt; i++) {
+            if (objects[i] != nil) {
+                newObjects[newObjsIndex] = objects[i];
+                newObjsIndex++;
+            }
+        }
+        instance = [self AvoidCrashArrayWithObjects:newObjects count:newObjsIndex];
+    }
+    @finally {
+        return instance;
+    }
+}
+
+
+
+//=================================================================
+//                     objectAtIndexedSubscript:
+//=================================================================
+#pragma mark - objectAtIndexedSubscript:
+- (id)avoidCrashObjectAtIndexedSubscript:(NSUInteger)idx {
+    id object = nil;
+    
+    @try {
+        object = [self avoidCrashObjectAtIndexedSubscript:idx];
+    }
+    @catch (NSException *exception) {
+        NSString *defaultToDo = AvoidCrashDefaultReturnNil;
+        [AvoidCrash noteErrorWithException:exception defaultToDo:defaultToDo];
+    }
+    @finally {
+        return object;
+    }
+
+}
+
+
+//=================================================================
+//                       objectsAtIndexes:
+//=================================================================
+#pragma mark - objectsAtIndexes:
+
+- (NSArray *)avoidCrashObjectsAtIndexes:(NSIndexSet *)indexes {
+    
+    NSArray *returnArray = nil;
+    @try {
+        returnArray = [self avoidCrashObjectsAtIndexes:indexes];
+    } @catch (NSException *exception) {
+        NSString *defaultToDo = AvoidCrashDefaultReturnNil;
+        [AvoidCrash noteErrorWithException:exception defaultToDo:defaultToDo];
+        
+    } @finally {
+        return returnArray;
+    }
+}
+
+
+//=================================================================
+//                         objectAtIndex:
+//=================================================================
+#pragma mark - objectAtIndex:
+
+//__NSArrayI  objectAtIndex:
+- (id)__NSArrayIAvoidCrashObjectAtIndex:(NSUInteger)index {
+    id object = nil;
+    
+    @try {
+        object = [self __NSArrayIAvoidCrashObjectAtIndex:index];
+    }
+    @catch (NSException *exception) {
+        NSString *defaultToDo = AvoidCrashDefaultReturnNil;
+        [AvoidCrash noteErrorWithException:exception defaultToDo:defaultToDo];
+    }
+    @finally {
+        return object;
+    }
+}
+
+
+
+//__NSSingleObjectArrayI objectAtIndex:
+- (id)__NSSingleObjectArrayIAvoidCrashObjectAtIndex:(NSUInteger)index {
+    id object = nil;
+    
+    @try {
+        object = [self __NSSingleObjectArrayIAvoidCrashObjectAtIndex:index];
+    }
+    @catch (NSException *exception) {
+        NSString *defaultToDo = AvoidCrashDefaultReturnNil;
+        [AvoidCrash noteErrorWithException:exception defaultToDo:defaultToDo];
+    }
+    @finally {
+        return object;
+    }
+}
+
+//__NSArray0 objectAtIndex:
+- (id)__NSArray0AvoidCrashObjectAtIndex:(NSUInteger)index {
+    id object = nil;
+    
+    @try {
+        object = [self __NSArray0AvoidCrashObjectAtIndex:index];
+    }
+    @catch (NSException *exception) {
+        NSString *defaultToDo = AvoidCrashDefaultReturnNil;
+        [AvoidCrash noteErrorWithException:exception defaultToDo:defaultToDo];
+    }
+    @finally {
+        return object;
+    }
+}
+
+
+//=================================================================
+//                           getObjects:range:
+//=================================================================
+#pragma mark - getObjects:range:
+
+//NSArray getObjects:range:
+- (void)NSArrayAvoidCrashGetObjects:(__unsafe_unretained id  _Nonnull *)objects range:(NSRange)range {
+    
+    @try {
+        [self NSArrayAvoidCrashGetObjects:objects range:range];
+    } @catch (NSException *exception) {
+        
+        NSString *defaultToDo = AvoidCrashDefaultIgnore;
+        [AvoidCrash noteErrorWithException:exception defaultToDo:defaultToDo];
+        
+    } @finally {
+        
+    }
+}
+
+
+//__NSSingleObjectArrayI  getObjects:range:
+- (void)__NSSingleObjectArrayIAvoidCrashGetObjects:(__unsafe_unretained id  _Nonnull *)objects range:(NSRange)range {
+    
+    @try {
+        [self __NSSingleObjectArrayIAvoidCrashGetObjects:objects range:range];
+    } @catch (NSException *exception) {
+        
+        NSString *defaultToDo = AvoidCrashDefaultIgnore;
+        [AvoidCrash noteErrorWithException:exception defaultToDo:defaultToDo];
+        
+    } @finally {
+        
+    }
+}
+
+
+//__NSArrayI  getObjects:range:
+- (void)__NSArrayIAvoidCrashGetObjects:(__unsafe_unretained id  _Nonnull *)objects range:(NSRange)range {
+    
+    @try {
+        [self __NSArrayIAvoidCrashGetObjects:objects range:range];
+    } @catch (NSException *exception) {
+        
+        NSString *defaultToDo = AvoidCrashDefaultIgnore;
+        [AvoidCrash noteErrorWithException:exception defaultToDo:defaultToDo];
+        
+    } @finally {
+        
+    }
+}
+
+
+
+
+@end
@@ -0,0 +1,25 @@
+//
+//  NSAttributedString+AvoidCrash.h
+//  AvoidCrashDemo
+//
+//  Created by mac on 16/10/15.
+//  Copyright © 2016年 chenfanfang. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@interface NSAttributedString (AvoidCrash)
+
+ (void)avoidCrashExchangeMethod;
+
+@end
+
+/**
+ *  Can avoid crash method
+ *
+ *  1.- (instancetype)initWithString:(NSString *)str
+ *  2.- (instancetype)initWithAttributedString:(NSAttributedString *)attrStr
+ *  3.- (instancetype)initWithString:(NSString *)str attributes:(NSDictionary<NSString *,id> *)attrs
+ *
+ *
+ */
@@ -0,0 +1,96 @@
+//
+//  NSAttributedString+AvoidCrash.m
+//  AvoidCrashDemo
+//
+//  Created by mac on 16/10/15.
+//  Copyright © 2016年 chenfanfang. All rights reserved.
+//
+
+#import "NSAttributedString+AvoidCrash.h"
+
+#import "AvoidCrash.h"
+
+@implementation NSAttributedString (AvoidCrash)
+
+ (void)avoidCrashExchangeMethod {
+    
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+        
+        Class NSConcreteAttributedString = NSClassFromString(@"NSConcreteAttributedString");
+        
+        //initWithString:
+        [AvoidCrash exchangeInstanceMethod:NSConcreteAttributedString method1Sel:@selector(initWithString:) method2Sel:@selector(avoidCrashInitWithString:)];
+        
+        //initWithAttributedString
+        [AvoidCrash exchangeInstanceMethod:NSConcreteAttributedString method1Sel:@selector(initWithAttributedString:) method2Sel:@selector(avoidCrashInitWithAttributedString:)];
+        
+        //initWithString:attributes:
+        [AvoidCrash exchangeInstanceMethod:NSConcreteAttributedString method1Sel:@selector(initWithString:attributes:) method2Sel:@selector(avoidCrashInitWithString:attributes:)];
+    });
+
+}
+
+//=================================================================
+//                           initWithString:
+//=================================================================
+#pragma mark - initWithString:
+
+- (instancetype)avoidCrashInitWithString:(NSString *)str {
+    id object = nil;
+    
+    @try {
+        object = [self avoidCrashInitWithString:str];
+    }
+    @catch (NSException *exception) {
+        NSString *defaultToDo = AvoidCrashDefaultReturnNil;
+        [AvoidCrash noteErrorWithException:exception defaultToDo:defaultToDo];
+    }
+    @finally {
+        return object;
+    }
+}
+
+
+//=================================================================
+//                          initWithAttributedString
+//=================================================================
+#pragma mark - initWithAttributedString
+
+- (instancetype)avoidCrashInitWithAttributedString:(NSAttributedString *)attrStr {
+    id object = nil;
+    
+    @try {
+        object = [self avoidCrashInitWithAttributedString:attrStr];
+    }
+    @catch (NSException *exception) {
+        NSString *defaultToDo = AvoidCrashDefaultReturnNil;
+        [AvoidCrash noteErrorWithException:exception defaultToDo:defaultToDo];
+    }
+    @finally {
+        return object;
+    }
+}
+
+
+//=================================================================
+//                      initWithString:attributes:
+//=================================================================
+#pragma mark - initWithString:attributes:
+
+- (instancetype)avoidCrashInitWithString:(NSString *)str attributes:(NSDictionary<NSString *,id> *)attrs {
+    id object = nil;
+    
+    @try {
+        object = [self avoidCrashInitWithString:str attributes:attrs];
+    }
+    @catch (NSException *exception) {
+        NSString *defaultToDo = AvoidCrashDefaultReturnNil;
+        [AvoidCrash noteErrorWithException:exception defaultToDo:defaultToDo];
+    }
+    @finally {
+        return object;
+    }
+}
+
+@end
@@ -0,0 +1,24 @@
+//
+//  NSDictionary+AvoidCrash.h
+//  AvoidCrash
+//
+//  Created by mac on 16/9/21.
+//  Copyright © 2016年 chenfanfang. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@interface NSDictionary (AvoidCrash)
+
+ (void)avoidCrashExchangeMethod;
+
+@end
+
+
+/**
+ *  Can avoid crash method
+ *
+ *  1. NSDictionary的快速创建方式 NSDictionary *dict = @{@"frameWork" : @"AvoidCrash"}; //这种创建方式其实调用的是2中的方法
+ *  2. +(instancetype)dictionaryWithObjects:(const id  _Nonnull __unsafe_unretained *)objects forKeys:(const id<NSCopying>  _Nonnull __unsafe_unretained *)keys count:(NSUInteger)cnt
+ *
+ */
@@ -0,0 +1,56 @@
+//
+//  NSDictionary+AvoidCrash.m
+//  AvoidCrash
+//
+//  Created by mac on 16/9/21.
+//  Copyright © 2016年 chenfanfang. All rights reserved.
+//
+
+#import "NSDictionary+AvoidCrash.h"
+
+#import "AvoidCrash.h"
+
+@implementation NSDictionary (AvoidCrash)
+
+ (void)avoidCrashExchangeMethod {
+    
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+        
+        [AvoidCrash exchangeClassMethod:self method1Sel:@selector(dictionaryWithObjects:forKeys:count:) method2Sel:@selector(avoidCrashDictionaryWithObjects:forKeys:count:)];
+    });
+}
+
+
+ (instancetype)avoidCrashDictionaryWithObjects:(const id  _Nonnull __unsafe_unretained *)objects forKeys:(const id<NSCopying>  _Nonnull __unsafe_unretained *)keys count:(NSUInteger)cnt {
+    
+    id instance = nil;
+    
+    @try {
+        instance = [self avoidCrashDictionaryWithObjects:objects forKeys:keys count:cnt];
+    }
+    @catch (NSException *exception) {
+        
+        NSString *defaultToDo = @"This framework default is to remove nil key-values and instance a dictionary.";
+        [AvoidCrash noteErrorWithException:exception defaultToDo:defaultToDo];
+        
+        //处理错误的数据，然后重新初始化一个字典
+        NSUInteger index = 0;
+        id  _Nonnull __unsafe_unretained newObjects[cnt];
+        id  _Nonnull __unsafe_unretained newkeys[cnt];
+        
+        for (int i = 0; i < cnt; i++) {
+            if (objects[i] && keys[i]) {
+                newObjects[index] = objects[i];
+                newkeys[index] = keys[i];
+                index++;
+            }
+        }
+        instance = [self avoidCrashDictionaryWithObjects:newObjects forKeys:newkeys count:index];
+    }
+    @finally {
+        return instance;
+    }
+}
+
+@end
@@ -0,0 +1,26 @@
+//
+//  NSMutableArray+AvoidCrash.h
+//  AvoidCrash
+//
+//  Created by mac on 16/9/21.
+//  Copyright © 2016年 chenfanfang. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@interface NSMutableArray (AvoidCrash)
+
+ (void)avoidCrashExchangeMethod;
+
+@end
+
+
+/**
+ *  Can avoid crash method
+ *
+ *  1. - (id)objectAtIndex:(NSUInteger)index
+ *  2. - (void)setObject:(id)obj atIndexedSubscript:(NSUInteger)idx
+ *  3. - (void)removeObjectAtIndex:(NSUInteger)index
+ *  4. - (void)insertObject:(id)anObject atIndex:(NSUInteger)index
+ *  5. - (void)getObjects:(__unsafe_unretained id  _Nonnull *)objects range:(NSRange)range
+ */
@@ -0,0 +1,143 @@
+//
+//  NSMutableArray+AvoidCrash.m
+//  AvoidCrash
+//
+//  Created by mac on 16/9/21.
+//  Copyright © 2016年 chenfanfang. All rights reserved.
+//
+
+#import "NSMutableArray+AvoidCrash.h"
+
+#import "AvoidCrash.h"
+
+@implementation NSMutableArray (AvoidCrash)
+
+ (void)avoidCrashExchangeMethod {
+    
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+        
+        Class arrayMClass = NSClassFromString(@"__NSArrayM");
+        
+        
+        //objectAtIndex:
+        [AvoidCrash exchangeInstanceMethod:arrayMClass method1Sel:@selector(objectAtIndex:) method2Sel:@selector(avoidCrashObjectAtIndex:)];
+        
+        //setObject:atIndexedSubscript:
+        [AvoidCrash exchangeInstanceMethod:arrayMClass method1Sel:@selector(setObject:atIndexedSubscript:) method2Sel:@selector(avoidCrashSetObject:atIndexedSubscript:)];
+        
+        
+        //removeObjectAtIndex:
+        [AvoidCrash exchangeInstanceMethod:arrayMClass method1Sel:@selector(removeObjectAtIndex:) method2Sel:@selector(avoidCrashRemoveObjectAtIndex:)];
+        
+        //insertObject:atIndex:
+        [AvoidCrash exchangeInstanceMethod:arrayMClass method1Sel:@selector(insertObject:atIndex:) method2Sel:@selector(avoidCrashInsertObject:atIndex:)];
+        
+        //getObjects:range:
+        [AvoidCrash exchangeInstanceMethod:arrayMClass method1Sel:@selector(getObjects:range:) method2Sel:@selector(avoidCrashGetObjects:range:)];
+    });
+    
+    
+    
+}
+
+
+//=================================================================
+//                    array set object at index
+//=================================================================
+#pragma mark - get object from array
+
+
+- (void)avoidCrashSetObject:(id)obj atIndexedSubscript:(NSUInteger)idx {
+    
+    @try {
+        [self avoidCrashSetObject:obj atIndexedSubscript:idx];
+    }
+    @catch (NSException *exception) {
+        [AvoidCrash noteErrorWithException:exception defaultToDo:AvoidCrashDefaultIgnore];
+    }
+    @finally {
+        
+    }
+}
+
+
+//=================================================================
+//                    removeObjectAtIndex:
+//=================================================================
+#pragma mark - removeObjectAtIndex:
+
+- (void)avoidCrashRemoveObjectAtIndex:(NSUInteger)index {
+    @try {
+        [self avoidCrashRemoveObjectAtIndex:index];
+    }
+    @catch (NSException *exception) {
+        [AvoidCrash noteErrorWithException:exception defaultToDo:AvoidCrashDefaultIgnore];
+    }
+    @finally {
+        
+    }
+}
+
+
+//=================================================================
+//                    insertObject:atIndex:
+//=================================================================
+#pragma mark - set方法
+- (void)avoidCrashInsertObject:(id)anObject atIndex:(NSUInteger)index {
+    @try {
+        [self avoidCrashInsertObject:anObject atIndex:index];
+    }
+    @catch (NSException *exception) {
+        [AvoidCrash noteErrorWithException:exception defaultToDo:AvoidCrashDefaultIgnore];
+    }
+    @finally {
+        
+    }
+}
+
+
+//=================================================================
+//                           objectAtIndex:
+//=================================================================
+#pragma mark - objectAtIndex:
+
+- (id)avoidCrashObjectAtIndex:(NSUInteger)index {
+    id object = nil;
+    
+    @try {
+        object = [self avoidCrashObjectAtIndex:index];
+    }
+    @catch (NSException *exception) {
+        NSString *defaultToDo = AvoidCrashDefaultReturnNil;
+        [AvoidCrash noteErrorWithException:exception defaultToDo:defaultToDo];
+    }
+    @finally {
+        return object;
+    }
+}
+
+
+//=================================================================
+//                         getObjects:range:
+//=================================================================
+#pragma mark - getObjects:range:
+
+- (void)avoidCrashGetObjects:(__unsafe_unretained id  _Nonnull *)objects range:(NSRange)range {
+    
+    @try {
+        [self avoidCrashGetObjects:objects range:range];
+    } @catch (NSException *exception) {
+        
+        NSString *defaultToDo = AvoidCrashDefaultIgnore;
+        [AvoidCrash noteErrorWithException:exception defaultToDo:defaultToDo];
+        
+    } @finally {
+        
+    }
+}
+
+
+
+
+@end
@@ -0,0 +1,23 @@
+//
+//  NSMutableAttributedString+AvoidCrash.h
+//  AvoidCrashDemo
+//
+//  Created by mac on 16/10/15.
+//  Copyright © 2016年 chenfanfang. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@interface NSMutableAttributedString (AvoidCrash)
+
+ (void)avoidCrashExchangeMethod;
+
+@end
+
+
+/**
+ *  Can avoid crash method
+ *
+ *  1.- (instancetype)initWithString:(NSString *)str
+ *  2.- (instancetype)initWithString:(NSString *)str attributes:(NSDictionary<NSString *,id> *)attrs
+ */
@@ -0,0 +1,74 @@
+//
+//  NSMutableAttributedString+AvoidCrash.m
+//  AvoidCrashDemo
+//
+//  Created by mac on 16/10/15.
+//  Copyright © 2016年 chenfanfang. All rights reserved.
+//
+
+#import "NSMutableAttributedString+AvoidCrash.h"
+
+#import "AvoidCrash.h"
+
+@implementation NSMutableAttributedString (AvoidCrash)
+
+ (void)avoidCrashExchangeMethod {
+    
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+        
+        Class NSConcreteMutableAttributedString = NSClassFromString(@"NSConcreteMutableAttributedString");
+        
+        //initWithString:
+        [AvoidCrash exchangeInstanceMethod:NSConcreteMutableAttributedString method1Sel:@selector(initWithString:) method2Sel:@selector(avoidCrashInitWithString:)];
+        
+        //initWithString:attributes:
+        [AvoidCrash exchangeInstanceMethod:NSConcreteMutableAttributedString method1Sel:@selector(initWithString:attributes:) method2Sel:@selector(avoidCrashInitWithString:attributes:)];
+    });
+}
+
+//=================================================================
+//                          initWithString:
+//=================================================================
+#pragma mark - initWithString:
+
+
+- (instancetype)avoidCrashInitWithString:(NSString *)str {
+    id object = nil;
+    
+    @try {
+        object = [self avoidCrashInitWithString:str];
+    }
+    @catch (NSException *exception) {
+        NSString *defaultToDo = AvoidCrashDefaultReturnNil;
+        [AvoidCrash noteErrorWithException:exception defaultToDo:defaultToDo];
+    }
+    @finally {
+        return object;
+    }
+}
+
+
+//=================================================================
+//                     initWithString:attributes:
+//=================================================================
+#pragma mark - initWithString:attributes:
+
+
+- (instancetype)avoidCrashInitWithString:(NSString *)str attributes:(NSDictionary<NSString *,id> *)attrs {
+    id object = nil;
+    
+    @try {
+        object = [self avoidCrashInitWithString:str attributes:attrs];
+    }
+    @catch (NSException *exception) {
+        NSString *defaultToDo = AvoidCrashDefaultReturnNil;
+        [AvoidCrash noteErrorWithException:exception defaultToDo:defaultToDo];
+    }
+    @finally {
+        return object;
+    }
+}
+
+
+@end
@@ -0,0 +1,24 @@
+//
+//  NSMutableDictionary+AvoidCrash.h
+//  AvoidCrash
+//
+//  Created by mac on 16/9/22.
+//  Copyright © 2016年 chenfanfang. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@interface NSMutableDictionary (AvoidCrash)
+
+ (void)avoidCrashExchangeMethod;
+
+@end
+
+
+/**
+ *  Can avoid crash method
+ *
+ *  1. - (void)setObject:(id)anObject forKey:(id<NSCopying>)aKey
+ *  2. - (void)removeObjectForKey:(id)aKey
+ *
+ */
@@ -0,0 +1,72 @@
+//
+//  NSMutableDictionary+AvoidCrash.m
+//  AvoidCrash
+//
+//  Created by mac on 16/9/22.
+//  Copyright © 2016年 chenfanfang. All rights reserved.
+//
+
+#import "NSMutableDictionary+AvoidCrash.h"
+
+#import "AvoidCrash.h"
+
+@implementation NSMutableDictionary (AvoidCrash)
+
+ (void)avoidCrashExchangeMethod {
+    
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+        Class dictionaryM = NSClassFromString(@"__NSDictionaryM");
+        
+        //setObject:forKey:
+        [AvoidCrash exchangeInstanceMethod:dictionaryM method1Sel:@selector(setObject:forKey:) method2Sel:@selector(avoidCrashSetObject:forKey:)];
+        
+        
+        //removeObjectForKey:
+        Method removeObjectForKey = class_getInstanceMethod(dictionaryM, @selector(removeObjectForKey:));
+        Method avoidCrashRemoveObjectForKey = class_getInstanceMethod(dictionaryM, @selector(avoidCrashRemoveObjectForKey:));
+        method_exchangeImplementations(removeObjectForKey, avoidCrashRemoveObjectForKey);
+    });
+}
+
+
+//=================================================================
+//                       setObject:forKey:
+//=================================================================
+#pragma mark - setObject:forKey:
+
+- (void)avoidCrashSetObject:(id)anObject forKey:(id<NSCopying>)aKey {
+    
+    @try {
+        [self avoidCrashSetObject:anObject forKey:aKey];
+    }
+    @catch (NSException *exception) {
+        [AvoidCrash noteErrorWithException:exception defaultToDo:AvoidCrashDefaultIgnore];
+    }
+    @finally {
+        
+    }
+}
+
+//=================================================================
+//                       removeObjectForKey:
+//=================================================================
+#pragma mark - removeObjectForKey:
+
+- (void)avoidCrashRemoveObjectForKey:(id)aKey {
+    
+    @try {
+        [self avoidCrashRemoveObjectForKey:aKey];
+    }
+    @catch (NSException *exception) {
+        [AvoidCrash noteErrorWithException:exception defaultToDo:AvoidCrashDefaultIgnore];
+    }
+    @finally {
+        
+    }
+}
+
+
+
+
+@end
@@ -0,0 +1,29 @@
+//
+//  NSMutableString+AvoidCrash.h
+//  AvoidCrashDemo
+//
+//  Created by mac on 16/10/6.
+//  Copyright © 2016年 chenfanfang. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@interface NSMutableString (AvoidCrash)
+
+ (void)avoidCrashExchangeMethod;
+
+@end
+
+
+/**
+ *  Can avoid crash method
+ *
+ *  1. 由于NSMutableString是继承于NSString,所以这里和NSString有些同样的方法就不重复写了
+ *  2. - (void)replaceCharactersInRange:(NSRange)range withString:(NSString *)aString
+ *  3. - (void)insertString:(NSString *)aString atIndex:(NSUInteger)loc
+ *  4. - (void)deleteCharactersInRange:(NSRange)range
+ *
+ */
+
+
+
@@ -0,0 +1,97 @@
+//
+//  NSMutableString+AvoidCrash.m
+//  AvoidCrashDemo
+//
+//  Created by mac on 16/10/6.
+//  Copyright © 2016年 chenfanfang. All rights reserved.
+//
+
+#import "NSMutableString+AvoidCrash.h"
+
+#import "AvoidCrash.h"
+
+@implementation NSMutableString (AvoidCrash)
+
+ (void)avoidCrashExchangeMethod {
+    
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+        
+        Class stringClass = NSClassFromString(@"__NSCFString");
+        
+        //replaceCharactersInRange
+        [AvoidCrash exchangeInstanceMethod:stringClass method1Sel:@selector(replaceCharactersInRange:withString:) method2Sel:@selector(avoidCrashReplaceCharactersInRange:withString:)];
+        
+        //insertString:atIndex:
+        [AvoidCrash exchangeInstanceMethod:stringClass method1Sel:@selector(insertString:atIndex:) method2Sel:@selector(avoidCrashInsertString:atIndex:)];
+        
+        //deleteCharactersInRange
+        [AvoidCrash exchangeInstanceMethod:stringClass method1Sel:@selector(deleteCharactersInRange:) method2Sel:@selector(avoidCrashDeleteCharactersInRange:)];
+    });
+}
+
+//=================================================================
+//                     replaceCharactersInRange
+//=================================================================
+#pragma mark - replaceCharactersInRange
+
+- (void)avoidCrashReplaceCharactersInRange:(NSRange)range withString:(NSString *)aString {
+    
+    @try {
+        [self avoidCrashReplaceCharactersInRange:range withString:aString];
+    }
+    @catch (NSException *exception) {
+        NSString *defaultToDo = AvoidCrashDefaultIgnore;
+        [AvoidCrash noteErrorWithException:exception defaultToDo:defaultToDo];
+    }
+    @finally {
+        
+    }
+}
+
+//=================================================================
+//                     insertString:atIndex:
+//=================================================================
+#pragma mark - insertString:atIndex:
+
+- (void)avoidCrashInsertString:(NSString *)aString atIndex:(NSUInteger)loc {
+    
+    @try {
+        [self avoidCrashInsertString:aString atIndex:loc];
+    }
+    @catch (NSException *exception) {
+        NSString *defaultToDo = AvoidCrashDefaultIgnore;
+        [AvoidCrash noteErrorWithException:exception defaultToDo:defaultToDo];
+    }
+    @finally {
+        
+    }
+}
+
+//=================================================================
+//                   deleteCharactersInRange
+//=================================================================
+#pragma mark - deleteCharactersInRange
+
+- (void)avoidCrashDeleteCharactersInRange:(NSRange)range {
+    
+    @try {
+        [self avoidCrashDeleteCharactersInRange:range];
+    }
+    @catch (NSException *exception) {
+        NSString *defaultToDo = AvoidCrashDefaultIgnore;
+        [AvoidCrash noteErrorWithException:exception defaultToDo:defaultToDo];
+    }
+    @finally {
+        
+    }
+}
+
+
+
+
+
+
+
+
+@end
@@ -0,0 +1,25 @@
+//
+//  NSObject+AvoidCrash.h
+//  AvoidCrashDemo
+//
+//  Created by mac on 16/10/11.
+//  Copyright © 2016年 chenfanfang. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@interface NSObject (AvoidCrash)
+
+ (void)avoidCrashExchangeMethod;
+
+@end
+
+/**
+ *  Can avoid crash method
+ *
+ *  1.- (void)setValue:(id)value forKey:(NSString *)key
+ *  2.- (void)setValue:(id)value forKeyPath:(NSString *)keyPath
+ *  3.- (void)setValue:(id)value forUndefinedKey:(NSString *)key //这个方法一般用来重写，不会主动调用
+ *  4.- (void)setValuesForKeysWithDictionary:(NSDictionary<NSString *,id> *)keyedValues
+ *
+ */
@@ -0,0 +1,114 @@
+//
+//  NSObject+AvoidCrash.m
+//  AvoidCrashDemo
+//
+//  Created by mac on 16/10/11.
+//  Copyright © 2016年 chenfanfang. All rights reserved.
+//
+
+#import "NSObject+AvoidCrash.h"
+
+#import "AvoidCrash.h"
+
+@implementation NSObject (AvoidCrash)
+
+ (void)avoidCrashExchangeMethod {
+    
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+        //setValue:forKey:
+        [AvoidCrash exchangeInstanceMethod:[self class] method1Sel:@selector(setValue:forKey:) method2Sel:@selector(avoidCrashSetValue:forKey:)];
+        
+        //setValue:forKeyPath:
+        [AvoidCrash exchangeInstanceMethod:[self class] method1Sel:@selector(setValue:forKeyPath:) method2Sel:@selector(avoidCrashSetValue:forKeyPath:)];
+        
+        //setValue:forUndefinedKey:
+        [AvoidCrash exchangeInstanceMethod:[self class] method1Sel:@selector(setValue:forUndefinedKey:) method2Sel:@selector(avoidCrashSetValue:forUndefinedKey:)];
+        
+        //setValuesForKeysWithDictionary:
+        [AvoidCrash exchangeInstanceMethod:[self class] method1Sel:@selector(setValuesForKeysWithDictionary:) method2Sel:@selector(avoidCrashSetValuesForKeysWithDictionary:)];
+    });
+    
+    
+}
+
+
+
+//=================================================================
+//                         setValue:forKey:
+//=================================================================
+#pragma mark - setValue:forKey:
+
+- (void)avoidCrashSetValue:(id)value forKey:(NSString *)key {
+    @try {
+        [self avoidCrashSetValue:value forKey:key];
+    }
+    @catch (NSException *exception) {
+        NSString *defaultToDo = AvoidCrashDefaultIgnore;
+        [AvoidCrash noteErrorWithException:exception defaultToDo:defaultToDo];
+    }
+    @finally {
+        
+    }
+}
+
+
+//=================================================================
+//                     setValue:forKeyPath:
+//=================================================================
+#pragma mark - setValue:forKeyPath:
+
+- (void)avoidCrashSetValue:(id)value forKeyPath:(NSString *)keyPath {
+    @try {
+        [self avoidCrashSetValue:value forKeyPath:keyPath];
+    }
+    @catch (NSException *exception) {
+        NSString *defaultToDo = AvoidCrashDefaultIgnore;
+        [AvoidCrash noteErrorWithException:exception defaultToDo:defaultToDo];
+    }
+    @finally {
+        
+    }
+}
+
+
+
+//=================================================================
+//                     setValue:forUndefinedKey:
+//=================================================================
+#pragma mark - setValue:forUndefinedKey:
+
+- (void)avoidCrashSetValue:(id)value forUndefinedKey:(NSString *)key {
+    @try {
+        [self avoidCrashSetValue:value forUndefinedKey:key];
+    }
+    @catch (NSException *exception) {
+        NSString *defaultToDo = AvoidCrashDefaultIgnore;
+        [AvoidCrash noteErrorWithException:exception defaultToDo:defaultToDo];
+    }
+    @finally {
+        
+    }
+}
+
+
+//=================================================================
+//                  setValuesForKeysWithDictionary:
+//=================================================================
+#pragma mark - setValuesForKeysWithDictionary:
+
+- (void)avoidCrashSetValuesForKeysWithDictionary:(NSDictionary<NSString *,id> *)keyedValues {
+    @try {
+        [self avoidCrashSetValuesForKeysWithDictionary:keyedValues];
+    }
+    @catch (NSException *exception) {
+        NSString *defaultToDo = AvoidCrashDefaultIgnore;
+        [AvoidCrash noteErrorWithException:exception defaultToDo:defaultToDo];
+    }
+    @finally {
+        
+    }
+}
+
+
+@end
@@ -0,0 +1,29 @@
+//
+//  NSString+AvoidCrash.h
+//  AvoidCrashDemo
+//
+//  Created by mac on 16/10/5.
+//  Copyright © 2016年 chenfanfang. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@interface NSString (AvoidCrash)
+
+ (void)avoidCrashExchangeMethod;
+
+@end
+
+
+/**
+ *  Can avoid crash method
+ *
+ *  1. - (unichar)characterAtIndex:(NSUInteger)index
+ *  2. - (NSString *)substringFromIndex:(NSUInteger)from
+ *  3. - (NSString *)substringToIndex:(NSUInteger)to {
+ *  4. - (NSString *)substringWithRange:(NSRange)range {
+ *  5. - (NSString *)stringByReplacingOccurrencesOfString:(NSString *)target withString:(NSString *)replacement
+ *  6. - (NSString *)stringByReplacingOccurrencesOfString:(NSString *)target withString:(NSString *)replacement options:(NSStringCompareOptions)options range:(NSRange)searchRange
+ *  7. - (NSString *)stringByReplacingCharactersInRange:(NSRange)range withString:(NSString *)replacement
+ *
+ */
@@ -0,0 +1,204 @@
+//
+//  NSString+AvoidCrash.m
+//  AvoidCrashDemo
+//
+//  Created by mac on 16/10/5.
+//  Copyright © 2016年 chenfanfang. All rights reserved.
+//
+
+#import "NSString+AvoidCrash.h"
+
+#import "AvoidCrash.h"
+
+@implementation NSString (AvoidCrash)
+
+ (void)avoidCrashExchangeMethod {
+    
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+        Class stringClass = NSClassFromString(@"__NSCFConstantString");
+        
+        //characterAtIndex
+        [AvoidCrash exchangeInstanceMethod:stringClass method1Sel:@selector(characterAtIndex:) method2Sel:@selector(avoidCrashCharacterAtIndex:)];
+        
+        //substringFromIndex
+        [AvoidCrash exchangeInstanceMethod:stringClass method1Sel:@selector(substringFromIndex:) method2Sel:@selector(avoidCrashSubstringFromIndex:)];
+        
+        //substringToIndex
+        [AvoidCrash exchangeInstanceMethod:stringClass method1Sel:@selector(substringToIndex:) method2Sel:@selector(avoidCrashSubstringToIndex:)];
+        
+        //substringWithRange:
+        [AvoidCrash exchangeInstanceMethod:stringClass method1Sel:@selector(substringWithRange:) method2Sel:@selector(avoidCrashSubstringWithRange:)];
+        
+        //stringByReplacingOccurrencesOfString:
+        [AvoidCrash exchangeInstanceMethod:stringClass method1Sel:@selector(stringByReplacingOccurrencesOfString:withString:) method2Sel:@selector(avoidCrashStringByReplacingOccurrencesOfString:withString:)];
+        
+        //stringByReplacingOccurrencesOfString:withString:options:range:
+        [AvoidCrash exchangeInstanceMethod:stringClass method1Sel:@selector(stringByReplacingOccurrencesOfString:withString:options:range:) method2Sel:@selector(avoidCrashStringByReplacingOccurrencesOfString:withString:options:range:)];
+        
+        //stringByReplacingCharactersInRange:withString:
+        [AvoidCrash exchangeInstanceMethod:stringClass method1Sel:@selector(stringByReplacingCharactersInRange:withString:) method2Sel:@selector(avoidCrashStringByReplacingCharactersInRange:withString:)];
+    });
+    
+}
+
+
+//=================================================================
+//                           characterAtIndex:
+//=================================================================
+#pragma mark - characterAtIndex:
+
+- (unichar)avoidCrashCharacterAtIndex:(NSUInteger)index {
+    
+    unichar characteristic;
+    @try {
+        characteristic = [self avoidCrashCharacterAtIndex:index];
+    }
+    @catch (NSException *exception) {
+        
+        NSString *defaultToDo = @"This framework default is to return a without assign unichar.";
+        [AvoidCrash noteErrorWithException:exception defaultToDo:defaultToDo];
+    }
+    @finally {
+        return characteristic;
+    }
+}
+
+//=================================================================
+//                           substringFromIndex:
+//=================================================================
+#pragma mark - substringFromIndex:
+
+- (NSString *)avoidCrashSubstringFromIndex:(NSUInteger)from {
+    
+    NSString *subString = nil;
+    
+    @try {
+        subString = [self avoidCrashSubstringFromIndex:from];
+    }
+    @catch (NSException *exception) {
+        
+        NSString *defaultToDo = AvoidCrashDefaultReturnNil;
+        [AvoidCrash noteErrorWithException:exception defaultToDo:defaultToDo];
+        subString = nil;
+    }
+    @finally {
+        return subString;
+    }
+}
+
+//=================================================================
+//                           substringToIndex
+//=================================================================
+#pragma mark - substringToIndex
+
+- (NSString *)avoidCrashSubstringToIndex:(NSUInteger)to {
+    
+    NSString *subString = nil;
+    
+    @try {
+        subString = [self avoidCrashSubstringToIndex:to];
+    }
+    @catch (NSException *exception) {
+        NSString *defaultToDo = AvoidCrashDefaultReturnNil;
+        [AvoidCrash noteErrorWithException:exception defaultToDo:defaultToDo];
+        subString = nil;
+    }
+    @finally {
+        return subString;
+    }
+}
+
+
+//=================================================================
+//                           substringWithRange:
+//=================================================================
+#pragma mark - substringWithRange:
+
+- (NSString *)avoidCrashSubstringWithRange:(NSRange)range {
+    
+    NSString *subString = nil;
+    
+    @try {
+        subString = [self avoidCrashSubstringWithRange:range];
+    }
+    @catch (NSException *exception) {
+        NSString *defaultToDo = AvoidCrashDefaultReturnNil;
+        [AvoidCrash noteErrorWithException:exception defaultToDo:defaultToDo];
+        subString = nil;
+    }
+    @finally {
+        return subString;
+    }
+}
+
+//=================================================================
+//                stringByReplacingOccurrencesOfString:
+//=================================================================
+#pragma mark - stringByReplacingOccurrencesOfString:
+
+- (NSString *)avoidCrashStringByReplacingOccurrencesOfString:(NSString *)target withString:(NSString *)replacement {
+    
+    NSString *newStr = nil;
+    
+    @try {
+        newStr = [self avoidCrashStringByReplacingOccurrencesOfString:target withString:replacement];
+    }
+    @catch (NSException *exception) {
+        NSString *defaultToDo = AvoidCrashDefaultReturnNil;
+        [AvoidCrash noteErrorWithException:exception defaultToDo:defaultToDo];
+        newStr = nil;
+    }
+    @finally {
+        return newStr;
+    }
+}
+
+//=================================================================
+//  stringByReplacingOccurrencesOfString:withString:options:range:
+//=================================================================
+#pragma mark - stringByReplacingOccurrencesOfString:withString:options:range:
+
+- (NSString *)avoidCrashStringByReplacingOccurrencesOfString:(NSString *)target withString:(NSString *)replacement options:(NSStringCompareOptions)options range:(NSRange)searchRange {
+    
+    NSString *newStr = nil;
+    
+    @try {
+        newStr = [self avoidCrashStringByReplacingOccurrencesOfString:target withString:replacement options:options range:searchRange];
+    }
+    @catch (NSException *exception) {
+        NSString *defaultToDo = AvoidCrashDefaultReturnNil;
+        [AvoidCrash noteErrorWithException:exception defaultToDo:defaultToDo];
+        newStr = nil;
+    }
+    @finally {
+        return newStr;
+    }
+}
+
+
+//=================================================================
+//       stringByReplacingCharactersInRange:withString:
+//=================================================================
+#pragma mark - stringByReplacingCharactersInRange:withString:
+
+- (NSString *)avoidCrashStringByReplacingCharactersInRange:(NSRange)range withString:(NSString *)replacement {
+
+    
+    NSString *newStr = nil;
+    
+    @try {
+        newStr = [self avoidCrashStringByReplacingCharactersInRange:range withString:replacement];
+    }
+    @catch (NSException *exception) {
+        NSString *defaultToDo = AvoidCrashDefaultReturnNil;
+        [AvoidCrash noteErrorWithException:exception defaultToDo:defaultToDo];
+        newStr = nil;
+    }
+    @finally {
+        return newStr;
+    }
+}
+
+
+@end