如何将UINavigationControllerDelegate连接到导航控制器？
问题描述：
解答：简单的语法错误 - 设定委托时，应该读SomeNavigationController.delegate =自，不SomeNavigationController.navigationController .delegate =自如何将UINavigationControllerDelegate连接到导航控制器？
下面是其中创建导航控制器的基本视图控制器？。我将自己声明为它的委托，并且在该视图控制器的扩展中符合委托的协议，并创建一个对象作为自定义动画。但是此导航堆栈中的视图控制器不采用此动画;我错过了什么？
是否需要在此导航堆栈的根视图控制器中存在任何代码，或者在此堆栈中正在推送和弹出的视图控制器中是否存在任何代码？或者所有的自定义动画代码都属于这里（在创建导航控制器的视图控制器中），我只是错过了一些东西？
视图控制器，其中的UINavigationController创建
class BaseViewController: UIViewController {
override func loadView() {
buildNavigationController()
}
func buildNavigationController() {
let SomeNavigationControllerRoot = SomeViewController()
let SomeNavigationController = UINavigationController(rootViewController: SomeNavigationControllerRoot)
SomeNavigationController.delegate = self
view.addSubview(SomeNavigationController.view)
}
}
extension BaseViewController: UINavigationControllerDelegate {
func navigationController(_ navigationController: UINavigationController, animationControllerFor operation: UINavigationControllerOperation, from fromVC: UIViewController, to toVC: UIViewController) -> UIViewControllerAnimatedTransitioning? {
return CustomAnimator()
}
}
class CustomAnimator: NSObject, UIViewControllerAnimatedTransitioning {
func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {
return 1.0
}
func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
let containerView = transitionContext.containerView
let toViewController = transitionContext.viewController(forKey: UITransitionContextViewControllerKey.to)
containerView.addSubview(toViewController!.view)
toViewController!.view.alpha = 0.0
UIView.animate(withDuration: 1.0, animations: {
toViewController!.view.alpha = 1.0
}, completion: { finished in
let cancelled = transitionContext.transitionWasCancelled
transitionContext.completeTransition(!cancelled)
})
}
}
根视图控制器中的UINavigationController栈
class SomeViewController: UIViewController, UINavigationControllerDelegate {
func pushToNext() {
let randomViewController = randomViewController()
navigationController?.pushViewController(randomViewController, animated: true)
}
}
答
如果你想使用自定义的转换则需要申请transitioningDelegate 将视图控制器的transitioningDelegate设置为您的自定义类并返回自定义动画控制器。
我想代替委托设置过渡委托。 toViewController.transitioningDelegate = self。 –