ios - dismissViewControllerAnimated 自定义动画

Question

我试图用自定义动画调用 dismissViewControllerAnimated，但它似乎不起作用。

当我像这样呈现 View Controller 时:

        cameraUI = UIImagePickerController()
    cameraUI.delegate = self
    cameraUI.sourceType = UIImagePickerControllerSourceType.Camera
    cameraUI.mediaTypes = [kUTTypeImage]
    cameraUI.allowsEditing = false
    cameraUI.showsCameraControls = false

    var translate = CGAffineTransformMakeTranslation(0.0, 71.0); //This slots the preview exactly in the middle of the screen by moving it down 71 points
    cameraUI.cameraViewTransform = translate;

    var scale = CGAffineTransformScale(translate, 1.333333, 1.333333);
    cameraUI.cameraViewTransform = scale;


    var transition = CATransition()
    transition.duration = 0.5
    transition.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaseOut)
    transition.type = kCATransitionMoveIn
    transition.subtype = kCATransitionFromLeft
    self.view.window?.layer.addAnimation(transition, forKey: nil)

    self.presentViewController(cameraUI, animated: false, completion: nil)

效果很好。它可以正确滑入。

然后我去驳回它:

            var transition = CATransition()
        transition.duration = 0.5
        transition.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaseOut)
        transition.type = kCATransitionMoveIn
        transition.subtype = kCATransitionFromRight
        self.view.window?.layer.addAnimation(transition, forKey: nil)
        cameraUI.dismissViewControllerAnimated(false, completion: nil)

它只是消失而根本没有动画。

有什么想法吗？

Answer 1

自定义呈现或关闭 View Controller 时发生的动画的方式不是在其背后提供过渡，而是自定义实际动画。为呈现的 View Controller 提供一个实现 animationControllerForPresentedController:presentingController:sourceController: 的 transitioningDelegate 和animationControllerForDismissedController:。现在动画 Controller 通过 animateTransition: 的实现全面负责动画。