可可窗口在替换视图时的大小加倍

问题描述：

我想在运行时用另一个视图（及其ViewController）替换一个视图。现在，当我这样做时，旧视图会从窗口中消失，但是新视图不会出现，并且窗口变为其原始宽度的两倍。如果我切换到全屏模式，我可以在应用程序窗口的左下角看到新的View非常小。可可窗口在替换视图时的大小加倍

有没有人知道为什么会发生这种情况？我几个小时都在尝试所有的事情，但我似乎无法找到发生这种情况的原因。

更换视图（以及它的ViewController）我使用下面的代码：

func exchangeDiashowViewController(for newDiashowViewController: NSViewController) { 
    if let oldDiashowViewControllerAsStateObserver = self.diashowViewController as? DiashowStateObserver { 
     DiashowManager.sharedInstance.remove(stateObserver: oldDiashowViewControllerAsStateObserver) 
    } 
    if let oldDiashowViewControllerAsSpeedObserver = self.diashowViewController as? DiashowSpeedObserver { 
     DiashowManager.sharedInstance.remove(speedObserver: oldDiashowViewControllerAsSpeedObserver) 
    } 

    if let newDiashowViewControllerAsStateObserver = newDiashowViewController as? DiashowStateObserver { 
     DiashowManager.sharedInstance.add(stateObserver: newDiashowViewControllerAsStateObserver) 
    } 
    if let newDiashowViewControllerAsSpeedObserver = newDiashowViewController as? DiashowSpeedObserver { 
     DiashowManager.sharedInstance.add(speedObserver: newDiashowViewControllerAsSpeedObserver) 
    } 

    self.view.replaceSubview(self.diashowViewController.view, with: newDiashowViewController.view) 
    self.diashowViewController.removeFromParentViewController() 
    self.addChildViewController(newDiashowViewController) 

    self.diashowViewController = newDiashowViewController 

    let centerHorizontallyConstraint = NSLayoutConstraint(item: self.diashowViewController.view, attribute: .centerX, relatedBy: .equal, toItem: self.view, attribute: .centerX, multiplier: 1.0, constant: 0.0) 
    let centerVerticallyConstraint = NSLayoutConstraint(item: self.diashowViewController.view, attribute: .centerY, relatedBy: .equal, toItem: self.view, attribute: .centerY, multiplier: 1.0, constant: 0.0) 
    let widthConstraint = NSLayoutConstraint(item: self.diashowViewController.view, attribute: .width, relatedBy: .equal, toItem: self.view, attribute: .width, multiplier: 1.0, constant: 0.0) 
    let heightConstraint = NSLayoutConstraint(item: self.diashowViewController.view, attribute: .height, relatedBy: .equal, toItem: self.view, attribute: .height, multiplier: 1.0, constant: 0.0) 

    self.view.addConstraints([centerHorizontallyConstraint, centerVerticallyConstraint, widthConstraint, heightConstraint]) 
}

我真的希望有人有一个想法。提前感谢！

答

看来self.view.replaceSubview()是问题所在。

我把一切都用

self.diashowViewController.view.removeFromSuperview() 
self.view.addSubview(newDiashowViewController.view)

，而不是工作。

可可窗口在替换视图时的大小加倍

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