Swift 4当前视图控制器黑屏

Question

I'm presenting another view controller like this:

func goToScreen(id : String) {
    let storyBoard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
    let newViewController = storyBoard.instantiateViewController(withIdentifier: id)
    self.present(newViewController, animated: true, completion: nil)
}

The problem is, there is a cc. 1 second delay between the appearance of the new viewcontroller, and in the meantime the app shows an all black screen. Why is that? It looks really ugly

Answer 1

change status of animation to false while move to next view controller this will remove the delay. Delay happening only because of animation: true. Use below code to solve your issue

self.present(newViewController, animated: false, completion: nil)

Hope this will help you

Answer 2

我是从UITabBarController继承的，而不是从我推送到的屏幕继承的UIViewController 。