iOS 简单自定义tabbar红点

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