5

我有一个CustomPresentationController带有自定义动画的进出动画；

这个特定的控制器被呈现出来，在屏幕尺寸的 50% 处更少，当我呈现它时，我添加了一个阴影灰色视图，presentingViewController因此它增加了一些深度。

presentedViewController如果我点击我调用默认方法的cancel按钮，我只能关闭。NavBardismiss(:)

我想要完成的是检测 外面的水龙头presentedViewController，也许在灰色区域内，所以我可以关闭presentedViewController，有点像关闭 anActionSheet但我没能做到。让我解释一下我到目前为止所做的尝试。

我尝试将 a 添加UITapGestureRecognizer到阴影灰色视图，但由于我呈现的是不同的控制器，因此应用程序引擎可能会认为，由于阴影视图不在顶层层次结构视图中，它可能无法访问，因此它“阻塞”识别器 - 每当我点击它时，手势句柄都不会触发。

我现在正在实施另外一个向下滑动来关闭，我可以很容易地做到这一点，但我真的希望点击外部功能也能正常工作。

关于如何解决这个问题的任何提示？

应用程序图像如下：

截屏

4

5 回答 5

6

我的解决方案：

在呈现视图控制器（又名 ViewControllerA）时：

let storyboard = UIStoryboard(name: "Main", bundle: nil)
                
let vcb = storyboard.instantiateViewController(withIdentifier: "ViewControllerB") as! ViewControllerB // ViewControllerB is the presented view controller 
        
vcb.modalPresentationStyle = .custom
        
vcb.transitioningDelegate = self

modalRatio = Float(0.5) // modalRatio is an object property 
   
self.present(pvc, animated: true)

ViewControllerA 还应实现转换委托：

extension ViewControllerA: UIViewControllerTransitioningDelegate {
        
    func presentationController(forPresented presented: UIViewController, presenting: UIViewController?, source: UIViewController) -> UIPresentationController? {
                
        return PartialSizePresentController(presentedViewController: presented, presenting: presenting, withRatio: modalRatio ?? 0.5) // modal ratio is configurable using modalRatio property
        
    }
    
}

然后，实现演示控制器（又名 PartialSizePresentController），以便它也处理轻击手势：

class PartialSizePresentController: UIPresentationController {
    
    let heightRatio : CGFloat
    
    init(presentedViewController: UIViewController, presenting presentingViewController: UIViewController?, withRatio ratio: Float = 0.5) {
        
        heightRatio = CGFloat(ratio)
        
        super.init(presentedViewController: presentedViewController, presenting: presentingViewController)
        
    }

    override var frameOfPresentedViewInContainerView: CGRect {
        
        guard let cv = containerView else { fatalError("No container view available") }
        
        return CGRect(x: 0, y: cv.bounds.height * (1 - heightRatio), width: cv.bounds.width, height: cv.bounds.height * heightRatio)
        
    }
    
    override func presentationTransitionWillBegin() {
        
        let bdView = UIView(frame: containerView!.bounds)
        
        bdView.backgroundColor = UIColor.black.withAlphaComponent(0.5)
        
        containerView?.addSubview(bdView)
        
        bdView.addSubview(presentedView!)
        
        let tapGesture = UITapGestureRecognizer(target: self, action: #selector(PartialSizePresentController.handleTap(_:)))
        
        bdView.addGestureRecognizer(tapGesture)
        
    }
    
    @objc func handleTap(_ sender: UITapGestureRecognizer) {
        presentedViewController.dismiss(animated: true, completion: nil)
    }
}
于 2020-08-03T16:50:27.163 回答
3

试试我下面的代码：

您需要在您作为弹出窗口使用的控制器中实现此方法。

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
   // Here write down you logic to dismiss controller     
}

希望这会奏效。:D

于 2017-07-03T09:20:45.493 回答
3

我只需要在我的一个应用程序中实现这一点。

我通过添加一个覆盖整个视图的按钮来使其工作，一旦点击此按钮就会触发 VC 被关闭。

添加按钮后，您可以在顶部添加自定义视图。

到目前为止，它看起来运行良好。

下面是我的代码（我以编程方式完成所有操作，没有情节提要）

    //—————————————————————————————
    // MARK: View Life Cycle
    //—————————————————————————————

override func viewDidLoad() {
    super.viewDidLoad()
    view.backgroundColor = UIColor.clear //VC view background transparent
    setupUI()
}

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

    //Animate blackView opacity to 1 to give some depth
    UIView.animate(withDuration: 0.4, delay: 0.2, options: .curveEaseInOut, animations: {
        self.blackView.alpha = 1 
    })
}

    //————————————————
    // MARK: Setup UI
    //————————————————

    let blackView: UIView = {
        let view = UIView()
        view.alpha = 0.0
        view.backgroundColor = UIColor.black.withAlphaComponent(0.6)
        return view
    }()
    //Invisible button which covers the entire view that can be tapped 
    lazy var dismissLayerBtn: UIButton = {
        let btn = UIButton()
        btn.addTarget(self, action: #selector(tapToDismiss), for: .touchUpInside)
        return btn
    }()

    @objc func tapToDismiss() {
        print("tapToDimiss")
        self.dismiss(animated: true, completion: nil)
    }

    let milestonePickerView: MilestonePickerView = {
        let view = MilestonePickerView(frame: .zero)
        return view
    }()

    func setupUI() {

        view.addSubview(blackView)
        view.addSubview(dismissLayerBtn)
        view.addSubview(milestonePickerView) //Important to add the customView after the button.

        blackView.anchor(top: view.topAnchor, left: view.leftAnchor, bottom: view.bottomAnchor, right: view.rightAnchor, paddingTop: 0, paddingLeft: 0, paddingBottom: 0, paddingRight: 0, width: 0, height: 0)

        dismissLayerBtn.anchor(top: view.topAnchor, left: view.leftAnchor, bottom: view.bottomAnchor, right: view.rightAnchor, paddingTop: 0, paddingLeft: 0, paddingBottom: 0, paddingRight: 0, width: 0, height: 0)

        milestonePickerView.anchor(top: nil, left: view.leftAnchor, bottom: view.bottomAnchor, right: view.rightAnchor, paddingTop: 0, paddingLeft: 20, paddingBottom: 40, paddingRight: 20, width: 0, height: 400)

//I'm using a custom extension to setup constraints (anchors) 
   }

如果您使用故事板，请确保将不可见按钮放在自定义视图下。

我希望这有帮助。

于 2018-02-28T09:12:16.903 回答
2

// 这个对我有用

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    var touch: UITouch? = touches.first
    if touch?.view == yourView {
        navigationController?.popViewController(animated: true)
        dismiss(animated: true, completion: nil)
    }
}
于 2021-06-18T13:14:56.350 回答
1

你在正确的轨道上使用UITapGestureRecognizer. 只要确保你shouldRecognizeSimultaneouslyWith这样实现：

func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool {
    return true
}

这应该允许手势正确触发。

于 2017-07-03T09:16:01.383 回答