swift - 更换 View 时， cocoa 窗的尺寸增加了一倍

我试图在运行时将一个视图（及其ViewController）替换为另一个视图。现在，当我这样做时，旧的视图从窗口中消失了，但是新的视图没有出现，并且窗口变成其原始宽度的两倍。
如果切换到全屏，则可以在应用程序窗口的左下角看到新的视图。

有人知道为什么会发生这种情况吗？我已经尝试了好几个小时，但似乎无法找到发生这种情况的原因。

为了替换View（及其ViewController），我使用以下代码：

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主意。在此先多谢！

最佳答案

看来self.view.replaceSubview()是问题所在。

我通过使用使一切正常

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

代替。

关于swift - 更换 View 时， cocoa 窗的尺寸增加了一倍，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/43428777/