1.系统中只有设置bage的方式,设置为nil也是为一个红点,但是很大,并不是我们需要的
2.扩充标红点的方法 (常用于有新的动态提示标志)
#import@interface UITabBar (XSDExt) - (void)showBadgeOnItemIndex:(int)index; /// <显示小红点 - (void)hidebadgeonitemindex:(int)index;>显示小红点>
#import "UITabBar+XSDExt.h" #define TabbarItemNums 3.0 //tabbar的数量 如果是5个设置为5 @implementation UITabBar (XSDExt) //显示小红点 - (void)showBadgeOnItemIndex:(NSInteger)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 = 5.0;//圆形 badgeView.backgroundColor = [UIColor redColor];//颜色:红色 CGRect tabFrame = self.frame; //确定小红点的位置 CGFloat percentX = (index + 0.6) / TabbarItemNums; CGFloat x = ceilf(percentX * tabFrame.size.width); CGFloat y = ceilf(0.1 * tabFrame.size.height); badgeView.frame = CGRectMake(x, y, 10.0, 10.0);//圆形大小为10 badgeView.clipsToBounds = YES; [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]; } } } @end