因此，我正在尝试在tvOS 10上的视图控制器之间进行动画过渡。
UIViewControllerTransitioningDelegate协议在tvOS上可用，因此我假设我也可以对其进行动画处理。但是由于某种原因，在呈现新的viewcontroller时不会调用任何函数。
我不知道我在做错什么，因为我在iOS上做的事情基本上完全相同。
这是我正在使用的代码：
展示代码
func showStuff() {
let viewController = ResultViewController()
viewController.transitioningDelegate = ResultViewControllerTransitionManager()
viewController.modalPresentationStyle = .custom
navigationController?.present(viewController, animated: true, completion: nil)
}
过渡代表
class ResultViewControllerTransitionManager: NSObject, UIViewControllerAnimatedTransitioning, UIViewControllerTransitioningDelegate {
var duration = 0.5
var isPresenting = false
func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {
return duration
}
func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
guard let fromView = transitionContext.view(forKey: UITransitionContextViewKey.from) else {return}
guard let toView = transitionContext.view(forKey: UITransitionContextViewKey.to) else {return}
(...)
}
func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
isPresenting = false
return self
}
func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
isPresenting = true
return self
}
}
最佳答案
您可以在第一个视图控制器中实现UIViewControllerAnimatedTransitioning和UIViewControllerTransitioningDelegate协议。您的第一个UIViewController可能具有以下代码：
class ViewController: UIViewController, UIViewControllerTransitioningDelegate, UIViewControllerAnimatedTransitioning {
func showStuff() {
let viewController = ResultViewController()
viewController.transitioningDelegate = self
viewController.modalPresentationStyle = .custom
self.present(viewController, animated: true, completion: nil)
}
var duration = 0.5
var isPresenting = false
func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
return self
}
func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
return self
}
func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {
return 2.0
}
func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
guard let fromView = transitionContext.view(forKey: UITransitionContextViewKey.from) else {return}
guard let toView = transitionContext.view(forKey: UITransitionContextViewKey.to) else {return}
}
}
另外，我从第一个控制器（而不是从navigationController）提供一个新控制器。
关于swift - tvOS上的UIViewControllerTransitioningDelegate没有被调用，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/40402784/