dismissViewControllerAnimated 自定义动画

Question

我正在尝试使用自定义动画调用dismissViewControllerAnimated，但它似乎不起作用。

当我呈现视图控制器时：

        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。

然后我去解散它：

            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)

它完全没有动画就消失了。

有什么想法吗？

Answer 1

您自定义呈现或关闭视图控制器时发生的动画的方式不是通过在其后面提供过渡，而是通过自定义实际动画。给呈现的视图控制器一个 transitioningDelegate 实现 animationControllerForPresentedController:presentingController:sourceController: 和 animationControllerForDismissedController:。现在动画控制器通过 animateTransition: 的实现完全负责动画。