ios - 将 UIViewcontroller 的视图添加到 UIWindow 不显示

Question

我正在尝试使用以下代码查看我正在使用情节提要的视图，但是我没有制作 uiviewcontroller 的场景初始视图控制器。这是我在 AppDelegate 的 didFinishLaunchingWithOption 中编写的代码。

UIWindow* window = [UIApplication sharedApplication].keyWindow;  
abcViewController *controller = [[abcViewController alloc]init];  
UIView *redView = [[UIView alloc] initWithFrame: CGRectMake ( [[UIScreen mainScreen] bounds].origin.x+30, [[UIScreen mainScreen] bounds].origin.y+30, 260, 400)];
[redView setBackgroundColor:[UIColor redColor]];
UIView *greenView = [[UIView alloc] initWithFrame: CGRectMake ( redView.frame.origin.x + 10.0f, redView.frame.origin.y + 10.0f, 180, 320)];
[greenView setBackgroundColor:[UIColor greenColor]];
[redView addSubview:greenView];
[controller.view addSubview:redView];
window.rootViewController = controller;
[window makeKeyAndVisible];
return YES;

Answer 1

1. 首先分配storyboard id给情节提要中的 abcViewController，例如“firstView”。
2. 在应用委托中导入 viewController
3. 在情节提要中，取消选中第一个视图控制器中的“是初始视图控制器”属性。
4. 在应用程序中info.plist，删除“主情节提要文件基本名称”的值。

5. 实例化故事板，创建窗口对象并在应用程序委托的application:didFinishLaunchingWithOptions:方法中设置初始视图控制器

   - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
   
       // Override point for customization after application launch.
   
       self.window = [[UIWindow alloc] initWithFrame:UIScreen.mainScreen.bounds];
       UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
   
       TestViewController *controller = [storyboard instantiateViewControllerWithIdentifier:@"firstView"];
   
       UIView *redView = [[UIView alloc] initWithFrame: CGRectMake ( [[UIScreen mainScreen] bounds].origin.x+30, [[UIScreen mainScreen] bounds].origin.y+30, 260, 400)];
       [redView setBackgroundColor:[UIColor redColor]];
       UIView *greenView = [[UIView alloc] initWithFrame: CGRectMake ( redView.frame.origin.x + 10.0f, redView.frame.origin.y + 10.0f, 180, 320)];
       [greenView setBackgroundColor:[UIColor greenColor]];
       [redView addSubview:greenView];
       [controller.view addSubview:redView];
   
       self.window.rootViewController = controller;
       [self.window makeKeyAndVisible];            
   
       return YES;
   }