ios - 从应用程序委托(delegate)加载UIStoryboard

我试图以这种方式从应用程序委托(delegate).m加载UIStoryboard:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    UIStoryboard *storybord = [UIStoryboard storyboardWithName:@"MainStoryboard_iPhone" bundle:[NSBundle mainBundle]];
    UIViewController *vc =[storybord instantiateInitialViewController];
    [self.window addSubview:vc.view];

    return YES;
}

此代码有什么问题？？任何的想法？

最佳答案

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

   UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard_iPhone" bundle:[NSBundle mainBundle]];
   UIViewController *vc =[storyboard instantiateInitialViewController];

   // Set root view controller and make windows visible
   self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
   self.window.rootViewController = vc;
   [self.window makeKeyAndVisible];

   return YES;
}

试试这个。我认为缺少设置根 View Controller 并使窗口可见。