Swift 中没有动画的自定义转场

Question

我正在尝试在没有任何动画的情况下在两个视图控制器之间进行自定义转场。一切都如我所料，只是控制台给我以下消息：

2015-06-16 12:19:01.537 prototyp_2[42453:9048104] Unbalanced calls to begin/end appearance transitions for .

这是我的代码：

class Segue_forward: UIStoryboardSegue {

    override func perform() {

        // zdroj a destinace do lokálních proměnných
        var firstVCView = self.sourceViewController.view as UIView!
        var secondVCView = self.destinationViewController.view as UIView!

        // rozměry displeje
        let screenWidth = UIScreen.mainScreen().bounds.size.width
        let screenHeight = UIScreen.mainScreen().bounds.size.height

        // initial position of destination view
        secondVCView.frame = CGRect(x: 0.0, y: 0.0, width: screenWidth, height: screenHeight)

        // protože destination VC není subview okna aplikace tak to musime napravit
        let window = UIApplication.sharedApplication().keyWindow
        window?.insertSubview(secondVCView, aboveSubview: firstVCView)

        // animace
        UIView.animateWithDuration(0.0, animations: { () -> Void in

            firstVCView.frame = CGRectOffset(firstVCView.frame, 0.0, 0.0)
            secondVCView.frame = CGRectOffset(secondVCView.frame, 0.0, 0.0)

        }) { (Finished) -> Void in

            self.sourceViewController.presentViewController(self.destinationViewController as! UIViewController, animated: false, completion: nil)

        }


    }

}

这是我的操作：

@IBAction func nextQuestion(sender: AnyObject) {
   self.performSegueWithIdentifier("id_forwardSegue", sender: self)
}

Answer 1

不用动画就可以了：

override func perform() {
    self.sourceViewController.presentViewController(self.destinationViewController as! UIViewController, animated: false, completion: nil)
}

Answer 2

使用 parentViewController 呈现新的 UIViewController：

self.sourceViewController.parentViewController?.presentViewController(YOUR_VIEW_CONTROLLER, animated: false, completion: nil)

Swift 中没有动画的自定义转场

Custom segue without animation in Swift

uiviewcontroller

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segue

swift