Xcode 更新后过渡停止工作

Posted 2023-04-14

【中文标题】Xcode 更新后过渡停止工作

【英文标题】：Transitions Stopped Working after Xcode Update

【发布时间】：2019-11-04 15:41:51

【问题描述】：

今天我更新了 Xcode，然后我在过去几年的所有应用程序中的所有转换都停止了工作。我测试了在新模拟器上运行它们并安装到 ios13.2 设备上。但是，当我从 App Store 下载我的任何应用程序时，过渡效果很好。稍后我将在试飞中尝试新版本。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)

过渡类

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 )
        
    

【参考方案1】：

将此行添加到您的代码中。

 details?.modalPresentationStyle = .fullScreen 

//完整代码

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

【参考方案2】：

尝试将您的modalPresentationStyle 更改为custom，如下所示：

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