Question

我一直在使用此代码转到不同的视图控制器。

let details = storyboard?.instantiateViewController(withIdentifier: "ViewMainMurmur")
details?.modalTransitionStyle = .coverVertical
present(details!, animated: true, completion: nil)

我创建了一个slideAnimator类来自定义我的过渡

class SlideAnimator: NSObject, UIViewControllerAnimatedTransitioning, UIViewControllerTransitioningDelegate {

    let duration = 0.5

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

        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 = 0.5
            toView.transform = CGAffineTransform.identity
            toView.alpha = 1

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

现在的问题是，当我在故事板上绘制了一个segue时，我只知道如何使用slideAnimator类。当我使用present（）时如何使用slideAnimator？

Answer 1

在致电present之前，将呈现的视图控制器transitioningDelegate设置为您的SlideAnimator。

Swift3中的自定义转换问题

1 个答案: