iOS TabBarItem设置红点（未读消息）

#import <UIKit/UIKit.h>@interface UITabBar (Extension)- (void)showBadgeOnItmIndex:(int)index;- (void)hideBadgeOnItemIndex:(int)index;@end

#import "UITabBar+Extension.h"#define TabbarItemNums 5.0@implementation UITabBar (badge)//显示红点- (void)showBadgeOnItmIndex:(int)index{ [self removeBadgeOnItemIndex:index]; //新建小红点 UIView *bview = [[UIView alloc]init]; bview.tag = 888+index; bview.layer.cornerRadius = 5; bview.clipsToBounds = YES; bview.backgroundColor = [UIColor redColor]; CGRect tabFram = self.frame; float percentX = (index+0.6)/TabbarItemNums; CGFloat x = ceilf(percentX*tabFram.size.width); CGFloat y = ceilf(0.1*tabFram.size.height); bview.frame = CGRectMake(x, y, 10, 10); [self addSubview:bview]; [self bringSubviewToFront:bview];}//隐藏红点-(void)hideBadgeOnItemIndex:(int)index{ [self removeBadgeOnItemIndex:index];}//移除控件- (void)removeBadgeOnItemIndex:(int)index{ for (UIView*subView in self.subviews) {  if (subView.tag == 888+index) {   [subView removeFromSuperview];  } }}@end