写个UITabBar分类
//显示小红点 。m
- (void)showBadgeOnItemIndex:(int)index{
//移除之前的小红点
[self removeBadgeOnItemIndex:index];
//新建小红点
UIView *badgeView = [[UIView alloc]init];
badgeView.tag = 888 + index;
badgeView.layer.cornerRadius = 5;//圆形
badgeView.backgroundColor = [UIColor colorWithRed:252/255.0 green:122/255.0 blue:130/255.0 alpha:1];//颜色：红色
CGRect tabFrame = self.frame;
//确定小红点的位置
float percentX = (index +0.6) / TabbarItemNums;
CGFloat x = ceilf(percentX * tabFrame.size.width);
CGFloat y = ceilf(0.1 * tabFrame.size.height + 2);
badgeView.frame = CGRectMake(x, y, 10, 10);//圆形大小为10
[self addSubview:badgeView];
}
//隐藏小红点
- (void)hideBadgeOnItemIndex:(int)index{
//移除小红点
[self removeBadgeOnItemIndex:index];
}
//移除小红点
- (void)removeBadgeOnItemIndex:(int)index{
//按照tag值进行移除
for (UIView *subView in self.subviews) {
if (subView.tag == 888+index) {
[subView removeFromSuperview];
}
}
}
。h
- (void)showBadgeOnItemIndex:(int)index; //显示小红点
- (void)hideBadgeOnItemIndex:(int)index; //隐藏小红点
在需要调用的类中倒入头文件
[self.tabBarController.tabBar showBadgeOnItemIndex:2];／／表示在第二个选项中出现小红点 当然特殊可以定制看个人喜好