两个视图之间的转换适用于 iOS8 但不适用于 iOS9

Question

我已经尝试了几个小时来让两个视图之间的过渡动​​画工作。 一直出现的问题是，当我让代码在 ios8.1 上工作时，它停止在 ios9.1 上工作，反之亦然。 问题很简单，我想转换到的视图消失了。 我知道有很多这样的主题，但没有一个答案对我有用，它总是对一个版本的 ios 有帮助，而对于另一个版本则不起作用。 我在某处读到动画无法正常工作的问题是我使用 AutoLayout 而解决方案之一是使用图层转换而不是这就是为什么我以适用于 iOS8 的代码版本结束但现在没有不适用于 iOS9...这是我使用并适用于 iOS8 的代码

 class ChannelDetailsCollectionViewController: UICollectionViewController {
     @IBAction func backButtonPressed(sender: AnyObject) {
            self.navigationController?.popViewControllerAnimated(true)
        }
    }

class UIAnimatedNavigationControllerDelegate: NSObject, UINavigationControllerDelegate {
func navigationController(navigationController: UINavigationController, animationControllerForOperation operation: UINavigationControllerOperation, fromViewController fromVC: UIViewController, toViewController toVC: UIViewController) -> UIViewControllerAnimatedTransitioning? {
    if operation == .Push {
        return SlideInAnimator()
    } else if operation == .Pop {
        return SlideInDismissAnimator()
    } else {
        return nil
    }
}


 func animateTransition(transitionContext: UIViewControllerContextTransitioning) {

    let containerView = transitionContext.containerView()!
    let toView = transitionContext.viewForKey(UITransitionContextToViewKey)!
    let fromView = transitionContext.viewForKey(UITransitionContextFromViewKey)!

    let duration = self.transitionDuration(transitionContext)

    containerView.addSubview(toView)

    let transition = CATransition()
    transition.startProgress = 0
    transition.endProgress = 1
    transition.speed  = 3.0
    transition.type = kCATransitionPush
    transition.subtype = kCATransitionFromLeft
    transition.duration = 1.0

    fromView.layer.addAnimation(transition, forKey:"transition")
    toView.layer.addAnimation(transition, forKey:"transition")

    fromView.hidden = true
    toView.hidden = false
    transitionContext.completeTransition(true)
}

这是适用于 iOS9 的方法在这个版本中，我看到当 toView.transform = CGAffineTransformIdentity 被调用时，视图会在 iOS8 中消失，我认为这是因为自动布局。 我试过检查 nil 视图并再次添加它们，但它仍然不起作用。

func animateTransition(transitionContext: UIViewControllerContextTransitioning) {
    let container = transitionContext.containerView()
    let fromViewController = transitionContext.viewControllerForKey(UITransitionContextFromViewControllerKey)
    let fromView = fromViewController!.view
    let toViewController = transitionContext.viewControllerForKey(UITransitionContextToViewControllerKey)
    let toView = toViewController!.view

    toView.transform = getSlideTransform(toView, offset: -container!.frame.width)
    fromView.transform = getSlideTransform(toView, offset: 0.0)
    container!.addSubview(toView)
    container!.addSubview(fromView)


    let duration = self.transitionDuration(transitionContext)

    UIView.animateWithDuration(duration, delay: 0.0, usingSpringWithDamping: 0.9, initialSpringVelocity: 0.8, options: [], animations: {

        toView.transform = CGAffineTransformIdentity
        fromView.transform = self.getSlideTransform(fromView, offset: fromView.frame.width+100)
        }, completion: { finished in

            transitionContext.completeTransition(true)
    })
}


private func getSlideTransform(view: UIView, offset: CGFloat) -> CGAffineTransform {

    let size = view.frame.size
    var offSetTransform = CGAffineTransformMakeTranslation(offset, 0)
    offSetTransform = CGAffineTransformScale(offSetTransform, 0.9, 0.9)

    return offSetTransform
}

有人可以给我一些提示，现在该尝试什么吗？ 因为我没有想法，而且正如我所说，我检查过的所有主题都可以解决一个版本的 iOS 的问题，并使另一个版本崩溃：/

Answer 1

因此，经过几个小时的尝试，我让代码可以在 iOS8 和 iOS9 上运行。

我正在为可能与我有类似问题但无能为力的任何人发布工作代码

func animateTransition(transitionContext: UIViewControllerContextTransitioning) {
    let container = transitionContext.containerView()
    let fromViewController = transitionContext.viewControllerForKey(UITransitionContextFromViewControllerKey)
    let fromView = fromViewController!.view
    let toViewController = transitionContext.viewControllerForKey(UITransitionContextToViewControllerKey)
    let toView = toViewController!.view

    let duration = self.transitionDuration(transitionContext)

toView.frame = transitionContext.initialFrameForViewController(toViewController!)
fromView.frame = transitionContext.initialFrameForViewController(fromViewController!)

toView.transform = getSlideTransform(toView, offset: -container!.frame.width)
fromView.transform = getSlideTransform(toView, offset: 0.0)
container!.addSubview(toView)


UIView.animateWithDuration(duration, delay: 0.0, usingSpringWithDamping: 0.9, initialSpringVelocity: 0.8, options: [], animations: {
fromView!.removeFromSuperview()
toView.transform = CGAffineTransformIdentity
fromView.transform = self.getSlideTransform(fromView, offset: fromView.frame.width)
toView.frame = transitionContext.finalFrameForViewController(toViewController!)
fromView.frame = transitionContext.finalFrameForViewController(fromViewController!)

    }, completion: { finished in

transitionContext.completeTransition(true)
})
}

在动画之前，我必须使用:initialFrameForViewController从transitionContext设置帧，在动画期间我必须使用:finalFrameForViewController从transitionContext设置最终帧。 它阻止了视图消失，可能它最终获得了正确的帧值。