Question

简介

我正在创建一个应用程序，该应用程序在UIViewController中嵌入RootViewController，该应用程序在UINavigationController中启动。 RootViewController里面有一个UITableView，并且由UIPanGestureRecognizer触发的自定义转换附加到屏幕右边缘的小“ handleView”（类型为UIView）上， “ SlideOutViewController” UIViewController由用户拖动到屏幕上。

自定义过渡及其UIPanGestureRecognizer可以完美运行。我的自定义过渡看起来像UIScreenEdgePanGestureRecognizer用于默认的弹出式互动，但我也可以用它来推动UIViewController。即滑出式视图控制器。

问题

我不知道如何在手势/转换（推动和弹出）期间将handleView附加到“ SlideOutViewController”的前沿，以及如何始终将其锚定在“ RootViewController”中在不进行过渡时位于屏幕的右边缘。
我当前的尝试使“ handleView”的移动速度比过渡速度快。理想情况下，handleView应该锚定到“ SlideOutViewController”。

问题

我应该如何将其“ handleView”管理为 1。。它始终出现在RootViewController的右侧以及 2。上。自定义过渡（按入和弹出）过程中“ SlideOutViewController”的前沿？

我的代码

RootViewController

class RootViewController: UIViewController {

    ...

    let navigationDelegate = CNNavigationDelegate()
    let handleView = UIView()

     override func viewDidLoad() {
         super.viewDidLoad()
         navigationController?.delegate = navigationDelegate
         setupHandleView()
         navigationDelegate.addPushInteractionController(to: handleView)
         ... // Additional view controller setup
     }

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

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

     private func setupHandleView() {
         handleView.layer.borderWidth = 1
         handleView.layer.borderColor = UIColor.black.cgColor
         handleView.layer.cornerRadius = 20
         handleView.translatesAutoresizingMaskIntoConstraints = false
         view.addSubview(handleView)
         handleView.frame = CGRect(x: view.frame.width - 12.5, y: view.frame.height / 2, width: 25, height: 60)
     }

}

SlideOutViewController

class SlideOutViewController: UIViewController {

    var navigationDelegate : CNNavigationDelegate  { return navigationController?.delegate as! CNNavigationDelegate}

    override func viewDidLoad() {
        super.viewDidLoad()
        navigationDelegate.addPopInteractionController(to: view)
        view.backgroundColor = .red
        setupNavigationBar()
    }

    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)
        navigationDelegate.pushDestination = nil
    }
}

NavigationController委托

class CNNavigationDelegate: 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 CNNavigationAnimator(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 CNNavigationDelegate {
    func addPushInteractionController(to view: UIView) {
        let swipe = UIPanGestureRecognizer(target: self, action: #selector(handlePushGesture(_:)))
        view.addGestureRecognizer(swipe)
    }

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

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

        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)
            handleView.center = CGPoint(x: handleView.center.x + position.x, y: handleView.center.y)
            gesture.setTranslation(.zero, in: gesture.view?.superview)
        case .ended, .cancelled:
            let speed = gesture.velocity(in: gesture.view)
            if speed.x < 0 || (speed.x == 0 && percentComplete > 0.5) {
                interactionController?.finish()
                UIView.animate(withDuration: 0.1, delay: 0.5, options: .curveLinear, animations: {
                    handleView.center = CGPoint(x: UIScreen.main.bounds.width, y: handleView.center.y)
                })
            } else {
                interactionController?.cancel()
                UIView.animate(withDuration: 0.5, delay: 0, options: .curveLinear, animations: {
                    handleView.center = CGPoint(x: UIScreen.main.bounds.width, y: handleView.center.y)
                })
            }
            interactionController = nil

        default:
            break
        }
    }
}

// MARK: - Pop

extension CNNavigationDelegate {
    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
        }
    }
}

NavigationAnimator

class CNNavigationAnimator: 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
    }
}

感谢您阅读我的问题。

Swift：为目标视图控制器添加句柄以进行自定义导航控制器过渡

简介

问题

问题

我的代码

0 个答案: