86 lines
2.7 KiB
Objective-C
86 lines
2.7 KiB
Objective-C
//
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// DataCenter.m
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// 爱鱼奇
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//
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// Created by imac on 15/9/21.
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// Copyright © 2015年 imac. All rights reserved.
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//
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#import "DataCenter.h"
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@implementation DataCenter
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{
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NSMutableDictionary *_dict;
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}
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//获取单例
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+(instancetype)defaultDtacenter{
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static DataCenter*center=nil;
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@synchronized(self){
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if (center==nil) {
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center=[[self alloc]init];
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}
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}
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return center;
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}
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//初始化
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-(instancetype)init{
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if (self=[super init]) {
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NSString*filePath=[self getFullFilePathWithName:@"myData.archiver"];
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//检测文件是否存在
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//保证 _dict指向的对象 和 本地归档文件数据同步
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//存在
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//读档 /解归档
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//成员变量变量是 对象指针 必须要拥有对象的绝对使用权 否则的话 对象可能随时释放
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if ([[NSFileManager defaultManager]fileExistsAtPath:filePath]) {
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_dict=[NSKeyedUnarchiver unarchiveObjectWithFile:filePath];
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}else{
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//不存在
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//创建 空的可变字典
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//成员变量变量是 对象指针 必须要拥有对象的绝对使用权
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_dict=[[NSMutableDictionary alloc]init];
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}
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}
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return self;
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}
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//根据文件名 获取指定文件名的在沙盒Documents的 全路径
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-(NSString*)getFullFilePathWithName:(NSString *)name{
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//方法1
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// NSString *docPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
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//方法2:获取Documents
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//注：NSDocumentDirectory 路径结构 var/mobile/Containers/Data/Application/FC53241A-883C-4770-9117-694E00A41173/Documents/myData.archiver
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// NSDocumentationDirectory /var/mobile/Containers/Data/Application/CFE1A228-F736-4018-B100-C8EBCD645630/Library/Documentation/myData.archiver
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NSArray*arr=NSSearchPathForDirectoriesInDomains(NSDocumentationDirectory, NSUserDomainMask, YES);
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NSString*docPath=arr[0];
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//检测Documents是否存在
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if ([[NSFileManager defaultManager]fileExistsAtPath:docPath]) {
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}else{
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// NSLog(@"Document不存在");
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}
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//拼接 文件在 Documents下的路径
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return [docPath stringByAppendingPathComponent:name];
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}
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-(void)setValue:(id)value forKey:(NSString*)key{
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//先存入字典
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[_dict setObject:value forKey:key];
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//立即归档 保证字典 和归档数据同步
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BOOL ret=[NSKeyedArchiver archiveRootObject:_dict toFile:[self getFullFilePathWithName:@"myData.archiver"]];
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if (!ret) {
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// NSLog(@"归档失败");
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}
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}
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//获取数据
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-(id)valueForKey:(NSString*)key{
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//从字典获取 _dict 和本地归档数据是同步的
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return _dict[key];
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}
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@end
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