iOS Present Viewcontroller getting black screen

Question

I am trying present ViewController I have created with StoryBoards:

 AuthViewController *authViewController = [[AuthViewController alloc] init];
    UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:authViewController];
    UIViewController *vc  = [[[[UIApplication sharedApplication] windows] firstObject] rootViewController];
    [vc presentViewController:nav animated:YES completion:nil];

But getting it with black screen. What could be the issue?

Answer 1

Alloc init AuthViewController并不意味着将为控制器创建视图布局.

这里视图控制器没有加载它的视图,这就是你得到黑屏的原因.使用storyboard对象和视图控制器的标识符来加载其视图.

在AuthViewController控制器的Storyboard中指定故事板标识符.

添加Storyboard ID并标记true为Use Storyboard ID像下面的图像的选项:

现在AuthViewController使用以下代码获取控制器对象:

AuthViewController *controller = [self.storyboard instantiateViewControllerWithIdentifier:@"AuthViewController"];