呈现ViewController只是显示黑屏

发布于 2025-01-20 18:03:32 字数 398 浏览 2 评论 0原文

我正在尝试通过按钮操作介绍一个ViewController。但这似乎无法正常工作。我没有任何错误，但是在单击按钮后，屏幕变黑了，什么也不会发生。我唯一能找到的东西是针对Objective-C，我只是想学习Swift。我正在使用故事板来设计它，并在设计器代码中适当的位置添加了ViewController

：

@IBAction func doShow(_ sender: Any)
{
   var newWindowViewController = NewWindowViewController()
   newWindowViewController.baseItem = self.baseItem
   present(newWindowViewController, animated: false)
}

原文

I am trying to present a ViewController from a Button action. But this seems to not work as i want it to. I do not get any error but after clicking the button the screen turns black and nothing happens. The only things i could manage to find are for objective-c and i am just trying to learn Swift. I am using storyboard to design this and added the Viewcontroller in the appropriate place in the designer

Code:

@IBAction func doShow(_ sender: Any)
{
   var newWindowViewController = NewWindowViewController()
   newWindowViewController.baseItem = self.baseItem
   present(newWindowViewController, animated: false)
}

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真心难拥有 2025-01-27 18:03:32

您需要先从故事板上实例化视图控制器。否则，它将不会包含任何视图并将黑色变。

@IBAction func doShow(_ sender: Any)
{
    // Instantiate your ViewController here
   var newWindowViewController = storyboard?.instantiateViewController(withIdentifier: "putyourIdentifierhere")) as! NewWindowViewController
   newWindowViewController.baseItem = self.baseItem
   present(newWindowViewController, animated: false)
}

You need to instantiate the ViewController first from your storyboard. Else it won´t contain any View and turn up black.

@IBAction func doShow(_ sender: Any)
{
    // Instantiate your ViewController here
   var newWindowViewController = storyboard?.instantiateViewController(withIdentifier: "putyourIdentifierhere")) as! NewWindowViewController
   newWindowViewController.baseItem = self.baseItem
   present(newWindowViewController, animated: false)
}

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