IOS第14天(1,UITabBarController的基本的使用)

**************HMAppDelegate.m

- (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];

    UITabBarController *tab = [[UITabBarController alloc] init];

    self.window.rootViewController = tab;

    UIViewController *vc1 = [[UIViewController alloc] init];

    vc1.view.backgroundColor = [UIColor redColor];

    vc1.tabBarItem.title = @"消息";

    vc1.tabBarItem.image = [UIImage imageNamed:@"tab_recent_nor"];

//    [tab addChildViewController:vc1];

    UIViewController *vc2 = [[UIViewController alloc] init];

    vc2.view.backgroundColor = [UIColor redColor];

    vc2.tabBarItem.title = @"联系人";

    vc2.tabBarItem.image = [UIImage imageNamed:@"tab_buddy_nor"];

    vc2.view.backgroundColor = [UIColor greenColor];

//    [tab addChildViewController:vc2];

    UIViewController *vc3 = [[UIViewController alloc] init];

    vc3.view.backgroundColor = [UIColor redColor];

    vc3.tabBarItem.title = @"动态";

    vc3.tabBarItem.image = [UIImage imageNamed:@"tab_qworld_nor"];

    vc3.view.backgroundColor = [UIColor blueColor];

//    [tab addChildViewController:vc3];

    tab.viewControllers = @[vc1,vc2,vc3];

    [self.window makeKeyAndVisible];

    return YES;

}