Question

简介

我正在创建一个应用程序，该应用程序的rootViewController中有一个val inputDStream = KafkaUtils.createDirectStream[String,String]( ssc, LocationStrategies.PreferConsistent, ConsumerStrategies.Assign[String, String]( topic-partition-list, kafkaProps, starting-offset-ranges))和一个UITableView附加到一个充当“句柄”的小型UIPanGestureRecognizer上，从而启用了自定义视图控制器从右平移名为{SlideOutViewController“的UIView的过渡。

问题

我注意到我的方法存在两个问题。但是实际的自定义过渡可以按预期工作。

在创建SlideOutViewController时，它没有附加到我认为的导航堆栈上，因此它没有关联的navigationBar。而且，如果我使用UIViewController将其压入堆栈，则会失去交互式转换。
侧面说明：我还没有找到一种方法来将手柄连接到以交互方式拖出的SlideOutViewController。因此，手柄的平移与SlideOutViewControllers的位置不一致。

问题

如何将SlideOutViewController添加到导航堆栈？这样，当我触发navigationController时，SlideOutViewController会随着NavigationBar过渡？

我的代码

在rootViewController中。

UIPanGestureRecognizer

class RootViewController: UIViewController { ... let slideControllerHandle = UIView() var interactionController : UIPercentDrivenInteractiveTransition? override func viewDidLoad() { super.viewDidLoad() ... // Setting up the table view etc... setupPanGForSlideOutController() } private func setupPanGForSlideOutController() { slideControllerHandle.translatesAutoresizingMaskIntoConstraints = false slideControllerHandle.layer.borderColor = UIColor.black.cgColor slideControllerHandle.layer.borderWidth = 1 slideControllerHandle.layer.cornerRadius = 30 view.addSubview(slideControllerHandle) slideControllerHandle.frame = CGRect(x: view.frame.width - 12.5, y: view.frame.height / 2, width: 25, height: 60) let panGestureForCalendar = UIPanGestureRecognizer(target: self, action: #selector(handlePanGestureForSlideOutViewController(_:))) slideControllerHandle.addGestureRecognizer(panGestureForCalendar) } @objc private func handlePanGestureForSlideOutViewController(_ gesture: UIPanGestureRecognizer) { let xPosition = gesture.location(in: view).x let percent = 1 - (xPosition / view.frame.size.width) switch gesture.state { case .began: guard let slideOutController = storyboard?.instantiateViewController(withIdentifier: "CNSlideOutViewControllerID") as? SlideOutViewController else { fatalError("Sigh...") } interactionController = UIPercentDrivenInteractiveTransition() slideOutController.customTransitionDelegate.interactionController = interactionController self.present(slideOutController, animated: true) case .changed: slideControllerHandle.center = CGPoint(x: xPosition, y: slideControllerHandle.center.y) interactionController?.update(percent) case .ended, .cancelled: let velocity = gesture.velocity(in: view) interactionController?.completionSpeed = 0.999 if percent > 0.5 || velocity.x < 10 { UIView.animate(withDuration: 0.5, delay: 0, usingSpringWithDamping: 0.8, initialSpringVelocity: 0.5, options: .curveEaseInOut, animations: { self.slideControllerHandle.center = CGPoint(x: self.view.frame.width, y: self.slideControllerHandle.center.y) }) interactionController?.finish() } else { UIView.animate(withDuration: 0.5, delay: 0, usingSpringWithDamping: 0.8, initialSpringVelocity: 0.5, options: .curveEaseInOut, animations: { self.slideControllerHandle.center = CGPoint(x: -25, y: self.slideControllerHandle.center.y) }) interactionController?.cancel() } interactionController = nil default: break } }

SlideOutViewController

自定义过渡代码。 Based on Rob's descriptive answer on this SO question

TransitionDelegate

class SlideOutViewController: UIViewController {

    var interactionController : UIPercentDrivenInteractiveTransition?
    let customTransitionDelegate = TransitionDelegate()

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        modalPresentationStyle = .custom
        transitioningDelegate = customTransitionDelegate
    }

    override func viewDidLoad() {
        super.viewDidLoad()
        view.backgroundColor = .red
        navigationItem.title = "Slide Controller"
        let addButton = UIBarButtonItem(barButtonSystemItem: .add, target: self, action: #selector(addNewData(_:)))
        navigationItem.setRightBarButton(addButton, animated: true)
    }

}

DragAnimatedTransitioning

class TransitioningDelegate: NSObject, UIViewControllerTransitioningDelegate {

    weak var interactionController : UIPercentDrivenInteractiveTransition?
    func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
        return CNRightDragAnimationController(transitionType: .presenting)
    }

    func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
        return CNRightDragAnimationController(transitionType: .dismissing)
    }

    func presentationController(forPresented presented: UIViewController, presenting: UIViewController?, source: UIViewController) -> UIPresentationController? {
        return PresentationController(presentedViewController: presented, presenting: presenting)
    }

    func interactionControllerForPresentation(using animator: UIViewControllerAnimatedTransitioning) -> UIViewControllerInteractiveTransitioning? {
        return interactionController
    }    

    func interactionControllerForDismissal(using animator: UIViewControllerAnimatedTransitioning) -> UIViewControllerInteractiveTransitioning? {
        return interactionController
    }
}

PresentationController

class CNRightDragAnimationController: NSObject, UIViewControllerAnimatedTransitioning {

    enum TransitionType {
        case presenting
        case dismissing
    }

    let transitionType: TransitionType

    init(transitionType: TransitionType) {
        self.transitionType = transitionType
        super.init()
    }

    func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
        let inView   = transitionContext.containerView
        let toView   = transitionContext.view(forKey: .to)!
        let fromView = transitionContext.view(forKey: .from)!

        var frame = inView.bounds

        switch transitionType {
        case .presenting:
            frame.origin.x = frame.size.width
            toView.frame = frame

            inView.addSubview(toView)
            UIView.animate(withDuration: transitionDuration(using: transitionContext), animations: {
                toView.frame = inView.bounds
            }, completion: { finished in
                transitionContext.completeTransition(!transitionContext.transitionWasCancelled)
            })
        case .dismissing:
            toView.frame = frame
            inView.insertSubview(toView, belowSubview: fromView)

            UIView.animate(withDuration: transitionDuration(using: transitionContext), animations: {
                frame.origin.x = frame.size.width
                fromView.frame = frame
            }, completion: { finished in
                transitionContext.completeTransition(!transitionContext.transitionWasCancelled)
            })
        }
    }

    func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {
        return 0.5
    }
}

感谢您阅读我的问题。

Answer 1

您从中获取的动画代码用于自定义的“呈现”（例如模式）过渡。但是，如果要在使用导航控制器时在推入/弹出时进行自定义导航，请为UINavigationController指定一个委托，然后在navigationController(_:animationControllerFor:from:to:)中返回适当的过渡委托。并实现navigationController(_:interactionControllerFor:)并返回您的交互控制器。

例如我会做类似的事情：

class FirstViewController: UIViewController {

    let navigationDelegate = CustomNavigationDelegate()

    override func viewDidLoad() {
        super.viewDidLoad()

        navigationController?.delegate = navigationDelegate
        navigationDelegate.addPushInteractionController(to: view)
    }

    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)

        navigationDelegate.pushDestination = { [weak self] in
            self?.storyboard?.instantiateViewController(withIdentifier: "Second")
        }
    }
}

位置：

class CustomNavigationDelegate: NSObject, UINavigationControllerDelegate {

    var interactionController: UIPercentDrivenInteractiveTransition?
    var current: UIViewController?
    var pushDestination: (() -> UIViewController?)?

    func navigationController(_ navigationController: UINavigationController,
                              animationControllerFor operation: UINavigationController.Operation,
                              from fromVC: UIViewController,
                              to toVC: UIViewController) -> UIViewControllerAnimatedTransitioning? {
        return CustomNavigationAnimator(transitionType: operation)
    }

    func navigationController(_ navigationController: UINavigationController,
                              interactionControllerFor animationController: UIViewControllerAnimatedTransitioning) -> UIViewControllerInteractiveTransitioning? {
        return interactionController
    }

    func navigationController(_ navigationController: UINavigationController, didShow viewController: UIViewController, animated: Bool) {
        current = viewController
    }
}

// MARK: - Push

extension CustomNavigationDelegate {
    func addPushInteractionController(to view: UIView) {
        let swipe = UIScreenEdgePanGestureRecognizer(target: self, action: #selector(handlePushGesture(_:)))
        swipe.edges = [.right]
        view.addGestureRecognizer(swipe)
    }

    @objc private func handlePushGesture(_ gesture: UIScreenEdgePanGestureRecognizer) {
        guard let pushDestination = pushDestination else { return }

        let position = gesture.translation(in: gesture.view)
        let percentComplete = min(-position.x / gesture.view!.bounds.width, 1.0)

        switch gesture.state {
        case .began:
            interactionController = UIPercentDrivenInteractiveTransition()
            guard let controller = pushDestination() else { fatalError("No push destination") }
            current?.navigationController?.pushViewController(controller, animated: true)

        case .changed:
            interactionController?.update(percentComplete)

        case .ended, .cancelled:
            let speed = gesture.velocity(in: gesture.view)
            if speed.x < 0 || (speed.x == 0 && percentComplete > 0.5) {
                interactionController?.finish()
            } else {
                interactionController?.cancel()
            }
            interactionController = nil

        default:
            break
        }
    }
}

// MARK: - Pop

extension CustomNavigationDelegate {
    func addPopInteractionController(to view: UIView) {
        let swipe = UIScreenEdgePanGestureRecognizer(target: self, action: #selector(handlePopGesture(_:)))
        swipe.edges = [.left]
        view.addGestureRecognizer(swipe)
    }

    @objc private func handlePopGesture(_ gesture: UIScreenEdgePanGestureRecognizer) {
        let position = gesture.translation(in: gesture.view)
        let percentComplete = min(position.x / gesture.view!.bounds.width, 1)

        switch gesture.state {
        case .began:
            interactionController = UIPercentDrivenInteractiveTransition()
            current?.navigationController?.popViewController(animated: true)

        case .changed:
            interactionController?.update(percentComplete)

        case .ended, .cancelled:
            let speed = gesture.velocity(in: gesture.view)
            if speed.x > 0 || (speed.x == 0 && percentComplete > 0.5) {
                interactionController?.finish()
            } else {
                interactionController?.cancel()
            }
            interactionController = nil


        default:
            break
        }
    }
}

和

class CustomNavigationAnimator: NSObject, UIViewControllerAnimatedTransitioning {

    let transitionType: UINavigationController.Operation

    init(transitionType: UINavigationController.Operation) {
        self.transitionType = transitionType
        super.init()
    }

    func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
        let inView   = transitionContext.containerView
        let toView   = transitionContext.view(forKey: .to)!
        let fromView = transitionContext.view(forKey: .from)!

        var frame = inView.bounds

        switch transitionType {
        case .push:
            frame.origin.x = frame.size.width
            toView.frame = frame

            inView.addSubview(toView)
            UIView.animate(withDuration: transitionDuration(using: transitionContext), animations: {
                toView.frame = inView.bounds
            }, completion: { finished in
                transitionContext.completeTransition(!transitionContext.transitionWasCancelled)
            })

        case .pop:
            toView.frame = frame
            inView.insertSubview(toView, belowSubview: fromView)

            UIView.animate(withDuration: transitionDuration(using: transitionContext), animations: {
                frame.origin.x = frame.size.width
                fromView.frame = frame
            }, completion: { finished in
                transitionContext.completeTransition(!transitionContext.transitionWasCancelled)
            })

        case .none:
            break
        }
    }

    func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {
        return 0.5
    }
}

然后，如果第二个视图控制器希望具有自定义的交互式弹出窗口以及滑动到第三个视图控制器的功能：

class SecondViewController: UIViewController {

    var navigationDelegate: CustomNavigationDelegate { return navigationController!.delegate as! CustomNavigationDelegate }

    override func viewDidLoad() {
        super.viewDidLoad()

        navigationDelegate.addPushInteractionController(to: view)
        navigationDelegate.addPopInteractionController(to: view)
    }

    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)

        navigationDelegate.pushDestination = { [weak self] in
            self?.storyboard?.instantiateViewController(withIdentifier: "Third")
        }
    }

}

但是如果最后一个视图控制器不能推到任何东西，而只能弹出：

class ThirdViewController: UIViewController {

    var navigationDelegate: CustomNavigationDelegate { return navigationController!.delegate as! CustomNavigationDelegate }

    override func viewDidLoad() {
        super.viewDidLoad()

        navigationDelegate.addPopInteractionController(to: view)
    }

    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)

        navigationDelegate.pushDestination = nil
    }

}

Swift：实例化视图控制器以在当前导航堆栈中进行自定义过渡

简介

问题

问题

我的代码

1 个答案: