UITabBarController 的入门练习

 

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    // Override point for customization after application launch.

    

    self.window = [[UIWindow alloc]initWithFrame:[[UIScreen mainScreen] bounds]];

    

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

    

    UIViewController *viewcontroller1 = [[UIViewController alloc] init];

    viewcontroller1.view.backgroundColor = [UIColor yellowColor];

    viewcontroller1.tabBarItem.title=@"首页"; //底部tabBar的标题

    viewcontroller1.tabBarItem.image=[UIImage imageNamed:@"icon.bundle/home@2x.png"];//底部tabBar的默认图片

    viewcontroller1.tabBarItem.selectedImage = [UIImage imageNamed:@"icon.bundle/home_selected@2x.png"];//底部tabBar的点击后显示的图片

    

    

    UIViewController *viewcontroller2 = [[UIViewController alloc] init];

    viewcontroller2.view.backgroundColor = [UIColor redColor];

    viewcontroller2.tabBarItem.title =@"视频";

    viewcontroller2.tabBarItem.image = [UIImage imageNamed:@"icon.bundle/video@2x.png"];

    viewcontroller2.tabBarItem.selectedImage =[UIImage imageNamed:@"icon.bundle/video_selected_2x.png"];

    

    UIViewController *viewcontroller3 = [[UIViewController alloc] init];

    viewcontroller3.view.backgroundColor = [UIColor blueColor];

    viewcontroller3.tabBarItem.title = @"推荐";

    viewcontroller3.tabBarItem.image =[UIImage imageNamed:@"icon.bundle/like@2x.png"];

    viewcontroller3.tabBarItem.selectedImage = [UIImage imageNamed:@"icon.bundle/like_selected@2x.png"];

    

    UIViewController *viewcontroller4 = [[UIViewController alloc] init];

    viewcontroller4.view.backgroundColor = [UIColor grayColor];

    viewcontroller4.tabBarItem.title = @"我的";

    viewcontroller4.tabBarItem.image =[UIImage imageNamed:@"icon.bundle/page@2x.png"];

    viewcontroller4.tabBarItem.selectedImage = [UIImage imageNamed:@"icon.bundle/page_selected@2x.png"];

    

    

    [tabBarController setViewControllers:@[viewcontroller1,viewcontroller2,viewcontroller3,viewcontroller4]];//将四个UIViewController装进UItabBarController只能够

    

    self.window.rootViewController = tabBarController; //设置根视图显示器为当前的UITabBarController

    [self.window makeKeyAndVisible ];

//    self.window.backgroundColor = [UIColor greenColor];

    

    return YES;

}