湖南备案网站建设方案书,10岁一12岁的创意手工,深圳企业网站设,是怎么开的?UINavigationController内部页面跳转默认为左右切换#xff0c;但是当我们想向上弹出进入界面#xff0c;或者向下离开界面时#xff0c;需要实现UINavigationControllerDelegate 协议自行控制页面的动画(否则直接在navVc上叠加动画会导致动画结束后的那个页面#xff0c;自…UINavigationController内部页面跳转默认为左右切换但是当我们想向上弹出进入界面或者向下离开界面时需要实现UINavigationControllerDelegate 协议自行控制页面的动画(否则直接在navVc上叠加动画会导致动画结束后的那个页面自动加了异常动画)本文介绍这个实现方案。
定义一个类实现 UIViewControllerAnimatedTransitioning协议实现下面的函数 class NavigationControllerAnimation: NSObject, UIViewControllerAnimatedTransitioning {let operation: UINavigationController.Operationinit(operation: UINavigationController.Operation) {self.operation operationsuper.init()}//页面过渡动画时间 func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) - TimeInterval {return 0.3}//加页面过渡的动画public func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {guard let fromViewController transitionContext.viewController(forKey: UITransitionContextViewControllerKey.from),let toViewController transitionContext.viewController(forKey: UITransitionContextViewControllerKey.to) else { return }let containerView transitionContext.containerViewif operation .push {// do your animation for pushtoViewController.view.frame containerView.bounds.offsetBy(dx: 0, dy: containerView.frame.size.height)fromViewController.view.frame containerView.boundscontainerView.addSubview(toViewController.view)UIView.animate(withDuration: transitionDuration(using: transitionContext),delay: 0,options: [ UIView.AnimationOptions.curveEaseOut ],animations: {toViewController.view.frame containerView.bounds},completion: { (finished) intransitionContext.completeTransition(true)})} else if operation .pop {// do your animation for popcontainerView.addSubview(toViewController.view)containerView.addSubview(fromViewController.view)//containerView 上加的view在动画结束后一段时间后被释放了fromViewController.view.frame containerView.bounds
// toViewController.view.frame containerView.boundsUIView.animate(withDuration: transitionDuration(using: transitionContext),animations: {fromViewController.view.frame containerView.bounds.offsetBy(dx: 0, dy: containerView.frame.size.height)},completion: { (finished) intransitionContext.completeTransition(true)})}}
}UINavigationController 添加delegate class BaseNavigationController: UINavigationController {override func viewDidLoad() {super.viewDidLoad()self.delegate self}
}实现delegate的协议 返回本文最开始定义的类的对象,这里只要返回nil 就会是默认的动画方式所以可以按照需求切换界面过渡动画
extension BaseNavigationController : UINavigationControllerDelegate {func navigationController(_ navigationController: UINavigationController, animationControllerFor operation: UINavigationController.Operation, from fromVC: UIViewController, to toVC: UIViewController) - UIViewControllerAnimatedTransitioning? {return NavigationControllerAnimation(operation: operation) }}参考 https://stackoverflow.com/questions/2215672/how-to-change-the-push-and-pop-animations-in-a-navigation-based-app
