#import <UIKit/UIKit.h>

 @interface BikeTabBar : UITabBar

 @end

 #import "BikeTabBar.h"

 @interface BikeTabBar ()

 //@property (nonatomic,weak)UIButton *centerButton;

 @end

 @implementation BikeTabBar

 - (void)layoutSubviews

 {

     [super layoutSubviews];

     UIButton *centerButton = [UIButton buttonWithType:UIButtonTypeCustom];

     [centerButton setImage:[UIImage imageNamed:@"tab_bar_ride0"] forState:UIControlStateNormal];

     [centerButton setImage:[UIImage imageNamed:@"tab_bar_ride1"] forState:UIControlStateHighlighted];

     // 一定要记得设置尺寸

     [centerButton sizeToFit];

     [self addSubview:centerButton];

     // 获取子按钮总数

     NSInteger count = self.items.count;

     CGFloat x = ;

     CGFloat y = ;

     CGFloat w = self.width / (count + );

     CGFloat h = self.height;

     int i = ;

     // 遍历所有的tabBarButton

     for (UIControl *tabBarButton in self.subviews) {

         if ([tabBarButton isKindOfClass:NSClassFromString(@"UITabBarButton")]) {

             if (i == ) {

                 i += ;

             }

             x = i * w;

             //  设置UITabBarButton位置

             tabBarButton.frame = CGRectMake(x, y, w, h);

             tabBarButton.tag = i;

             i++;

             // 监听 UIControlEventTouchDownRepeat : 短时间内连续地重复点击

             //            [tabBarButton addTarget:self action:@selector(tabBarButtonClick:) forControlEvents:UIControlEventTouchDownRepeat];

             [tabBarButton addTarget:self action:@selector(centerButtonClicked:) forControlEvents:UIControlEventTouchUpInside];

         }

     }

     // 设置加号按钮位置

     centerButton.center = CGPointMake(UIScreenWidth * 0.5, h * 0.5);

 }

 - (void)centerButtonClicked:(UIButton*)sender{

 }

 @end