今天，我更新了Xcode，然后过去几年中所有应用程序中的所有转换都停止了工作。我测试了如何在新的模拟器上以及通过安装到iOS13.2设备上运行它们。但是，当我从App Store下载任何应用程序时，过渡效果很好。我将在稍后的试飞中尝试新的版本。也许这些年来我一直在做错事？

转换代码

let details = self.storyboard?.instantiateViewController(withIdentifier: "ViewSettings")
details?.transitioningDelegate = self.slideAnimatorLeft
self.present(details!,animated: true,completion: nil)

过渡班

class SlideAnimatorLeft: NSObject,UIViewControllerAnimatedTransitioning,UIViewControllerTransitioningDelegate {

    let duration = 0.9

    func animationController(forPresented presented: UIViewController,presenting: UIViewController,source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
        return self
    }

    func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
        return self
    }

    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
        }

        let container = transitionContext.containerView

        let screenOffUp = CGAffineTransform(translationX: container.frame.width,y: 0)
        let screenOffDown = CGAffineTransform(translationX: -container.frame.width,y: 0)

        container.addSubview(fromView)
        container.addSubview(toView)

        toView.transform = screenOffUp

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

            fromView.transform = screenOffDown
            fromView.alpha = 1
            toView.transform = CGAffineTransform.identity
            toView.alpha = 1

        }) { (success) in
            transitionContext.completeTransition(success )
        }
    }
}