自定义转换

Question

我有一个导航控制器，并在该导航控制器的内部，我有一个主屏幕，从主屏幕我点击一个按钮，转到另一个屏幕。

但使用导航控制器时的标准显示动画是从侧面滑动，但我想要做的是视图控制器从屏幕底部向上滑动，并在到达时创建一种弹跳动画顶端。

Answer 1

任何想使用自定义转换的人都需要记住UIViewControllerAnimatedTransitioning和UIViewControllerTransitioningDelegate协议。现在，顺应UIViewControllerAnimatedTransitioning您customclass内从NSObject

import UIKit 
class CustomPushAnimation: NSObject, UIViewControllerAnimatedTransitioning { 

    func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval { 
     return 0.2 
    } 

    func animateTransition(using transitionContext: UIViewControllerContextTransitioning) { 
     let containerVw = transitionContext.containerView 
     let fromViewController = transitionContext.viewController(forKey: .from) 
     let toViewController = transitionContext.viewController(forKey: .to) 
     guard let fromVc = fromViewController, let toVc = toViewController else { return } 
     let finalFrame = transitionContext.finalFrame(for: toVc) 

    //For different animation you can play around this line by changing frame 
     toVc.view.frame = finalFrame.offsetBy(dx: 0, dy: finalFrame.size.height/2) 
     containerVw.addSubview(toVc.view) 
     UIView.animate(withDuration: transitionDuration(using: transitionContext), animations: { 
      toVc.view.frame = finalFrame 
      fromVc.view.alpha = 0.5 
     }, completion: {(finished) in 
      transitionContext.completeTransition(finished) 
      fromVc.view.alpha = 1.0 
     }) 
    } 
} 

上述方法继承将动画的照顾。之后，创建 上述目的和使用yourViewController类中

import UIKit 
class YourViewController: UIViewController { 
lazy var customPushAnimation: CustomPushAnimation = { 
     return CustomPushAnimation() 
    }() 
func openViewControler() { 
}let vc =//Assuming your view controller which you want to open 
let navigationController = UINavigationController(rootViewController: vc) 
//Set transitioningDelegate to invoke protocol method 
navigationController.transitioningDelegate = self 
present(navigationController, animated: true, completion: nil) 
} 

注：为了看到动画。在呈现ViewController时，千万不要将动画标志设置为假 。否则，你的动画将不会工作， 。

最后实现UIViewControllerTransitioningDelegate协议方法里面YourViewcontroller类

extension YourViewController: UIViewControllerTransitioningDelegate { 
    func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? { 
     return customPushAnimation 
    } 

每当您提出上述协议的方法 打来电话，你的动画魔力就会出现视图 - 控制。