tabBar用block实现自定义

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    self.window.backgroundColor = [UIColor whiteColor];
    [self.window makeKeyAndVisible];
    
    NSMutableArray *viewContrs=[[NSMutableArray alloc]init];
    for (int i=0; i<5; i++)
    {
        UIViewController *viewContr=[[UIViewController alloc]init];
        viewContr.view.backgroundColor=[UIColor colorWithRed:i*0.2 green:i*0.2 blue:0.5 alpha:0.8];
        [viewContrs addObject:viewContr];
    }
    //创建标签控制器
    tabBarViewContr=[[UITabBarController alloc]init];
    tabBarViewContr.viewControllers=viewContrs;
    
    //把图片存入5个对象中再存入数组中
    NSMutableArray *items=[[NSMutableArray alloc]init];
    for (int i=0; i<5; i++)
    {
        Items *item=[[Items alloc]init];
        NSString *str=[NSString stringWithFormat:@"%d.jpg",i+1];
        [item setImage:[UIImage imageNamed:str] title:str];
        [items addObject:item];
    }
    
    //自定义的tabBar
    TabBar *tabBar1=[[TabBar alloc]initWithFrame:tabBarViewContr.tabBar.bounds];
    tabBar1.itemArray=items;
//    tabBar1.delegate=self;
    tabBar1.block=^(TabBar *sender,NSInteger tag){
//        [self tabBar:sender didTag:tag];
        tabBarViewContr.selectedIndex=tag;
    };
    
//    tabBarViewContr.tabBar.hidden=YES;
    [tabBarViewContr.tabBar addSubview:tabBar1];
    
    
    self.window.rootViewController=tabBarViewContr;
    return YES;
}




自定义的TabBar实现文件

- (void)setItemArray:(NSArray *)items
{
    CGFloat width=self.frame.size.width/items.count;
    for (int i=0; i<items.count; i++)
    {
        Items *item=[items objectAtIndex:i];
        UIButton *btn=[UIButton buttonWithType:UIButtonTypeCustom];
        btn.frame=CGRectMake(i*width, 0, width, self.frame.size.height-15);
        [btn addTarget:self action:@selector(didClicked:) forControlEvents:UIControlEventTouchUpInside];
        btn.tag=i;
        [btn setImage:item.image forState:UIControlStateNormal];
        [self addSubview:btn];
        
        //显示文字
        UILabel *label=[[UILabel alloc]initWithFrame:CGRectMake(i*width, self.frame.size.height-15, width, 15)];
        label.text=item.title;
        label.textAlignment=NSTextAlignmentCenter;
        [self addSubview:label];
    }
}

- (void)didClicked:(UIButton *)sender
{
    if (_delegate&&[_delegate respondsToSelector:@selector(tabBar:didTag:)])
    {
        [_delegate tabBar:self didTag:sender.tag];
    }
    _block(self,sender.tag);
}