如何以编程方式添加的UITabBarController和UINavigationController的在AppDelegate中？

Question

如何在应用程序委托添加UINavigationController & UITabBarController编程。

Answer 1

不要在AppDelegate.h文件忘了补充：

@property (strong, nonatomic) UITabBarController *tabBarController; 

下面是AppDelegate.m

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { 
    // Override point for customization after application launch. 

    self.tabBarController = [[UITabBarController alloc] init]; 

    ViewController1 *VC1 = [[ViewController1 alloc] init]; 
    VC1.title = @"Tab Title Here"; 
    UINavigationController *VC1Navigation = [[UINavigationController alloc] 
               initWithRootViewController:VC1]; 

    ViewController2 *VC2 = [[ViewController2 alloc] init]; 
    VC2.title = @"Tab Title Here"; 
    UINavigationController *VC2Navigation = [[UINavigationController alloc] 
               initWithRootViewController:VC2]; 

    ViewController3 *VC3 = [[ViewController3 alloc] init]; 
    homeView.title = @"Tab Title Here"; 
    UINavigationController* VC3Navigation = [[UINavigationController alloc] 
              initWithRootViewController:VC3]; 

    NSArray* controllers = [NSArray arrayWithObjects:VC1Navigation, VC2Navigation, VC3Navigation, nil]; 
    self.tabBarController.viewControllers = controllers; 

    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]]; 
    self.window.backgroundColor = [UIColor whiteColor]; 
    self.window.rootViewController = self.tabBarController; 
    [self.window makeKeyAndVisible]; 
    return YES; 
}