iOS Swift开发 navigation模式自定义pop和push动画

在基于navigation的跳转涉及到pop和push操作，这个时候，如果想要自定义画面切入的动画可以按如下操作

添加如下类：

import UIKitclass SimpleOver: NSObject, UIViewControllerAnimatedTransitioning {var popStyle: Bool = falsefunc transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {return 0.20}func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {if popStyle {animatePop(using: transitionContext)return}let fz = transitionContext.viewController(forKey: UITransitionContextViewControllerKey.from)!let tz = transitionContext.viewController(forKey: UITransitionContextViewControllerKey.to)!let f = transitionContext.finalFrame(for: tz)let fOff = f.offsetBy(dx: 0, dy: f.height)//let fOff = f.offsetBy(dx: f.width, dy: 0)tz.view.frame = fOfftransitionContext.containerView.insertSubview(tz.view, aboveSubview: fz.view)UIView.animate(withDuration: transitionDuration(using: transitionContext),animations: {tz.view.frame = f}, completion: {_ intransitionContext.completeTransition(true)})}func animatePop(using transitionContext: UIViewControllerContextTransitioning) {let fz = transitionContext.viewController(forKey: UITransitionContextViewControllerKey.from)!let tz = transitionContext.viewController(forKey: UITransitionContextViewControllerKey.to)!let f = transitionContext.initialFrame(for: fz)let fOffPop = f.offsetBy(dx: 0, dy: f.height)//let fOffPop = f.offsetBy(dx: f.width, dy: 0)transitionContext.containerView.insertSubview(tz.view, belowSubview: fz.view)UIView.animate(withDuration: transitionDuration(using: transitionContext),animations: {fz.view.frame = fOffPop}, completion: {_ intransitionContext.completeTransition(true)})}}

在第一个载入的界面中添加

class ViewController: UIViewController,UIViewControllerTransitioningDelegate, UINavigationControllerDelegate {let simpleOver = SimpleOver()...func navigationController(_ navigationController: UINavigationController,animationControllerFor operation: UINavigationController.Operation,from fromVC: UIViewController,to toVC: UIViewController) -> UIViewControllerAnimatedTransitioning? {simpleOver.popStyle = (operation == .pop)return simpleOver}...override func viewDidLoad() {super.viewDidLoad()...navigationController?.delegate = self...}...
}

之后正常使用pop和push命令，即可使用我们自定义的动画效果了。

 此方法从stackoverflow获得，并加以修改成自己的动画效果，测试可以正常工作。