2016.04.06 UITabBar+badge.h

#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

.m

//

// UITabBar+badge.m

// Patient

//

// Created by wangjian on 15/12/2.

// Copyright © 2015年 ShangYu. All rights reserved.

//

#import "UITabBar+badge.h"

#define TabbarItemNums 5.0

@implementation UITabBar (badge)

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

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

//显示小红点

- (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 redColor];//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);

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];

}

}

}

@end