IOS开发之UITabBarController与UINavigationController混合使用

ios开发中UITabBarController与UINavigationController混合使用是很多app的基础页面结构，下面是简单的的页面初始化的方法，在AppDelegate.m的

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

　　中加入如下代码

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

    self.window.backgroundColor = [UIColor whiteColor];

    [self.window makeKeyAndVisible];

    //初始化tabbar并设置为根视图

    tabBarViewController = [[UITabBarController alloc]init];

    [self.window setRootViewController:tabBarViewController];

    //初始化视图并注入tabbar作为子视图

    MainViewController* first = [[MainViewController alloc]init];

    first.title = @"首页";

    first.tabBarItem = [[UITabBarItem alloc]initWithTitle:@"首页" image:[UIImage imageNamed:@"singleicon.png"]  selectedImage:[UIImage imageNamed:@"singleicon.png"] ];

    //初始化navigation并把navigation加入到tabbar中

    UINavigationController * navFirst = [[UINavigationController alloc]initWithRootViewController:first];

    [tabBarViewController addChildViewController:navFirst];

    BobMyInfoTableViewController* second = [[BobMyInfoTableViewController alloc]init];

    second.title = @"我的信息";

    second.tabBarItem = [[UITabBarItem alloc]initWithTitle:@"我" image:[UIImage imageNamed:@"doubleicon.png"] selectedImage:[UIImage imageNamed:@"doubleicon.png"]];

     UINavigationController * navSec = [[UINavigationController alloc]initWithRootViewController:second];

    [tabBarViewController addChildViewController:navSec];

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