Initial commit

2017-08-15 16:59:01 +08:00
commit bdc83e07ef
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+//
+//  NTESBadgeView.m
+//  NIMDemo
+//
+//  Created by chris on 15/2/12.
+//  Copyright (c) 2015年 Netease. All rights reserved.
+//
+
+
+#import "NTESBadgeView.h"
+#import "NSString+NTES.h"
+
+@interface NTESBadgeView ()
+
+@property (strong) UIColor *badgeBackgroundColor;
+
+@property (strong) UIColor *badgeTextColor;
+
+@property (nonatomic) UIFont *badgeTextFont;
+
+@property (nonatomic) CGFloat badgeTopPadding; //数字顶部到红圈的距离
+
+@property (nonatomic) CGFloat badgeLeftPadding; //数字左部到红圈的距离
+
+@property (nonatomic) CGFloat whiteCircleWidth; //最外层白圈的宽度
+
+@end
+
+@implementation NTESBadgeView
+
+ (instancetype)viewWithBadgeTip:(NSString *)badgeValue{
+    if (!badgeValue) {
+        badgeValue = @"";
+    }
+    NTESBadgeView *instance = [[NTESBadgeView alloc] init];
+    instance.frame = [instance frameWithStr:badgeValue];
+    instance.badgeValue = badgeValue;
+    
+    return instance;
+}
+
+- (id)initWithFrame:(CGRect)frame {
+    self = [super initWithFrame:frame];
+    if (self) {
+        self.backgroundColor  = [UIColor clearColor];
+        _badgeBackgroundColor = [UIColor redColor];
+        _badgeTextColor       = [UIColor whiteColor];
+        _badgeTextFont        = [UIFont boldSystemFontOfSize:12];
+        _whiteCircleWidth     = 2.f;
+    }
+    return self;
+}
+
+
+- (void)drawRect:(CGRect)rect
+{
+    CGContextRef context = UIGraphicsGetCurrentContext();
+    CGContextSaveGState(context);
+    if ([[self badgeValue] length]) {
+        [self drawWithContent:rect context:context];
+    }else{
+        [self drawWithOutContent:rect context:context];
+    }
+    CGContextRestoreGState(context);
+}
+
+- (void)setBadgeValue:(NSString *)badgeValue {
+    _badgeValue = badgeValue;
+    if (_badgeValue.integerValue > 9) {
+       _badgeLeftPadding     = 6.f;
+    }else{
+       _badgeLeftPadding     = 2.f;
+    }
+    _badgeTopPadding      = 2.f;
+
+    self.frame = [self frameWithStr:badgeValue];
+    
+    
+    [self setNeedsDisplay];
+}
+
+- (CGSize)badgeSizeWithStr:(NSString *)badgeValue{
+    if (!badgeValue || badgeValue.length == 0) {
+        return CGSizeZero;
+    }
+    CGSize size = [badgeValue sizeWithAttributes:@{NSFontAttributeName:self.badgeTextFont}];
+    if (size.width < size.height) {
+        size = CGSizeMake(size.height, size.height);
+    }
+    return size;
+}
+
+- (CGRect)frameWithStr:(NSString *)badgeValue{
+    CGSize badgeSize = [self badgeSizeWithStr:badgeValue];
+    CGRect badgeFrame = CGRectMake(self.frame.origin.x, self.frame.origin.y, badgeSize.width + self.badgeLeftPadding * 2 + self.whiteCircleWidth * 2, badgeSize.height + self.badgeTopPadding * 2 + self.whiteCircleWidth * 2);//8=2*2（红圈-文字）+2*2（白圈-红圈）
+    return badgeFrame;
+}
+
+
+
+#pragma mark - Private
+- (void)drawWithContent:(CGRect)rect context:(CGContextRef)context{
+    CGRect bodyFrame = self.bounds;
+    CGRect bkgFrame = CGRectInset(self.bounds, self.whiteCircleWidth, self.whiteCircleWidth);
+    CGRect badgeSize = CGRectInset(self.bounds, self.whiteCircleWidth + self.badgeLeftPadding, self.whiteCircleWidth + self.badgeTopPadding);
+    if ([self badgeBackgroundColor]) {//外白色描边
+        CGContextSetFillColorWithColor(context, [[UIColor whiteColor] CGColor]);
+        if ([self badgeValue].integerValue > 9) {
+            CGFloat circleWith = bodyFrame.size.height;
+            CGFloat totalWidth = bodyFrame.size.width;
+            CGFloat diffWidth = totalWidth - circleWith;
+            CGPoint originPoint = bodyFrame.origin;
+            CGRect leftCicleFrame = CGRectMake(originPoint.x, originPoint.y, circleWith, circleWith);
+            CGRect centerFrame = CGRectMake(originPoint.x +circleWith/2, originPoint.y, diffWidth, circleWith);
+            CGRect rightCicleFrame = CGRectMake(originPoint.x +(totalWidth - circleWith), originPoint.y, circleWith, circleWith);
+            CGContextFillEllipseInRect(context, leftCicleFrame);
+            CGContextFillRect(context, centerFrame);
+            CGContextFillEllipseInRect(context, rightCicleFrame);
+            
+        }else{
+            CGContextFillEllipseInRect(context, bodyFrame);
+        }
+        // badge背景色
+        CGContextSetFillColorWithColor(context, [[self badgeBackgroundColor] CGColor]);
+        if ([self badgeValue].integerValue > 9) {
+            CGFloat circleWith = bkgFrame.size.height;
+            CGFloat totalWidth = bkgFrame.size.width;
+            CGFloat diffWidth = totalWidth - circleWith;
+            CGPoint originPoint = bkgFrame.origin;
+            CGRect leftCicleFrame = CGRectMake(originPoint.x, originPoint.y, circleWith, circleWith);
+            CGRect centerFrame = CGRectMake(originPoint.x +circleWith/2, originPoint.y, diffWidth, circleWith);
+            CGRect rightCicleFrame = CGRectMake(originPoint.x +(totalWidth - circleWith), originPoint.y, circleWith, circleWith);
+            CGContextFillEllipseInRect(context, leftCicleFrame);
+            CGContextFillRect(context, centerFrame);
+            CGContextFillEllipseInRect(context, rightCicleFrame);
+        }else{
+            CGContextFillEllipseInRect(context, bkgFrame);
+        }
+    }
+    
+    CGContextSetFillColorWithColor(context, [[self badgeTextColor] CGColor]);
+    NSMutableParagraphStyle *badgeTextStyle = [[NSMutableParagraphStyle defaultParagraphStyle] mutableCopy];
+    [badgeTextStyle setLineBreakMode:NSLineBreakByWordWrapping];
+    [badgeTextStyle setAlignment:NSTextAlignmentCenter];
+    
+    
+    NSDictionary *badgeTextAttributes = @{
+                                          NSFontAttributeName: [self badgeTextFont],
+                                          NSForegroundColorAttributeName: [self badgeTextColor],
+                                          NSParagraphStyleAttributeName: badgeTextStyle,
+                                          };
+    [[self badgeValue] drawInRect:CGRectMake(self.whiteCircleWidth + self.badgeLeftPadding,
+                                             self.whiteCircleWidth + self.badgeTopPadding,
+                                             badgeSize.size.width, badgeSize.size.height)
+                   withAttributes:badgeTextAttributes];
+}
+
+
+- (void)drawWithOutContent:(CGRect)rect context:(CGContextRef)context{
+    CGRect bodyFrame = self.bounds;
+    CGContextSetFillColorWithColor(context, [[UIColor redColor] CGColor]);
+    CGContextFillEllipseInRect(context, bodyFrame);
+}
+
+@end