tabbar加小红点

原文   http://blog.csdn.net/u013531246/article/details/44460115

#import <UIKit/UIKit.h>

 

@interface UITabBar (badge)

 

- (void)showBadgeOnItemIndex:(int)index;   //显示小红点

 

- (void)hideBadgeOnItemIndex:(int)index; //隐藏小红点

 

@end

 

#import "UITabBar+badge.h"

#define TabbarItemNums 3.0    //tabbar的数量

 

@implementation UITabBar (badge)

- (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;

    badgeView.backgroundColor = [UIColor redColor];

    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);

    badgeView.frame = CGRectMake(x, y, 10, 10);

    [self addSubview:badgeView];

    

}

 

- (void)hideBadgeOnItemIndex:(int)index{

    

    //移除小红点

    [self removeBadgeOnItemIndex:index];

    

}

 

- (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