Question

调用函数时，我希望SixthViewController能够呈现给用户而无需用户按任何按钮。我知道如何通过设置按钮来显示另一个ViewController来显示＆＃34;显示＆＃34;另一个ViewController，但是一旦调用函数，我怎么能以编程方式强制SixthViewController出现？

Answer 1

你可以用这种方式呈现viewcontroller：

let destVC = SixthViewController() 
self.present(destVC, animated: true, completion: nil)

或

let storyboard: UIStoryboard = UIStoryboard(name: "storyboardNamehere", bundle: nil) 
let destVC = self.storyboard?.instantiateViewController(withIdentifier: "ViewControllerIdentifierhere" as! SixthViewController 
self.present(destVC, animated: true, completion: nil)

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Answer 2

如果您不使用segues但导航控制器请尝试：

let destinationVC = SixthViewController()
    self.navigationController?.pushViewController(destinationVC, animated: true)

如果您只是想显示没有导航控制器：

let destinationVC = SixthViewController()
    self.present(destinationVC, animated: true, completion: nil)

如果您使用情节提要：

let storyboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
let destVC = self.storyboard?.instantiateViewController(withIdentifier: "SixthViewController" as! SixthViewController
self.present(destVC, animated: true, completion: nil)

Answer 3

只需写下这个函数，并且当你想在func pushViewController之类的函数中推送或写下它时调用它，并将其称为self.pushViewController（），它就是它。

let storyBoard : UIStoryboard = UIStoryboard(name: "Main", bundle:nil)

let sixthViewController = storyBoard.instantiateViewController(withIdentifier: "SixthViewController") as! SixthViewController
self.navigationController?.pushViewController(sixthViewController, animated: true)

如何在没有用户按任何按钮的情况下强制ViewController呈现？

3 个答案: