tabBar的常见设置

效果展示

1. 签tarBar协议

 目的点击时tabBarItem.badgeValue = nil

<UITabBarControllerDelegate>

2.设置

 self.window = [[UIWindowalloc]initWithFrame:[[UIScreenmainScreen]bounds]];

    self.window.backgroundColor = [UIColor whiteColor];
    [self.window makeKeyAndVisible];

   

   // 微信部分 

    RootViewController *rootVC = [[RootViewController alloc]init];
    UINavigationController *naVC = [[UINavigationController alloc]initWithRootViewController:rootVC];
    // 设置内容
    naVC.tabBarItem = [[UITabBarItem alloc]initWithTitle:@"微信"image:[UIImage imageNamed:@"clock"] tag:1000];
    // 提示信息
    naVC.tabBarItem.badgeValue = @"1";
   

   

   // 通讯录部分 

    firstViewController *firstVC = [[firstViewController alloc]init];
    UINavigationController *firstnaVC = [[UINavigationController alloc]initWithRootViewController:firstVC];
    firstnaVC.tabBarItem = [[UITabBarItem alloc]initWithTitle:@"通讯录" image:[UIImage imageNamed:@"chat2"] selectedImage:[UIImage imageNamed:@"gear"]];
    firstnaVC.tabBarItem.badgeValue = @"new";
   

   

   // 第三部分 

    SecondViewController *secondVC = [[SecondViewController alloc]init];
    UINavigationController *secondnaVC = [[UINavigationController alloc]initWithRootViewController:secondVC];
    secondVC.tabBarItem = [[UITabBarItem alloc]initWithTabBarSystemItem: UITabBarSystemItemBookmarks tag:10000];
    secondVC.tabBarItem.badgeValue = @"99+";
   
   
   
    // 标签视图控制器，用来管理导航控制器的
    UITabBarController *tabBars = [[UITabBarController alloc]init];
   
    // 设置背景颜色
    tabBars.tabBar.barTintColor = [UIColor greenColor];
    // 设置不半透明
    tabBars.tabBar.translucent = NO;
    // 设置选中按钮的颜色
    tabBars.tabBar.tintColor = [UIColor blueColor];
   
   
   
    // 给标签控制器指定子控制器
    tabBars.viewControllers = [NSArray arrayWithObjects:naVC,firstnaVC,secondnaVC,nil];
    self.window.rootViewController = tabBars;
    [tabBars release];
   
   

    tabBars.delegate = self;

   

3.实现tarBar协议方法

// 点击tabBar 上按钮时触发
- (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController{
    NSLog(@"==%@",viewController);
    UINavigationController *navc = (UINavigationController *)viewController;
    navc.tabBarItem.badgeValue = nil;

}