Ios Swift：如何检测子视图中是否发生了刷卡？

假设

ui视图

“父视图”包含子视图、子视图和其他子视图

UIViewController

将滑动手势识别器附加到ParentView

在ChildView上滑动会触发此滑动处理程序

在ParentView的滑动处理程序中，是否有方法检测滑动是否发生在ChildView上

根据Josh的回答，以下是尝试的代码，但不起作用：

class TestViewController: UIViewController {    

@IBOutlet weak var targetView: UIView!


override func viewDidLoad() {
    super.viewDidLoad()
    initSwipeGestures()
}


fileprivate func initSwipeGestures() {
    let leftSwipe = UISwipeGestureRecognizer(target: self, action: #selector(didViewSwipe))
    let rightSwipe = UISwipeGestureRecognizer(target: self, action: #selector(didViewSwipe))
    let upSwipe = UISwipeGestureRecognizer(target: self, action: #selector(didViewSwipe))
    let downSwipe = UISwipeGestureRecognizer(target: self, action: #selector(didViewSwipe))
    leftSwipe.direction = .left
    rightSwipe.direction = .right
    upSwipe.direction = .up
    downSwipe.direction = .down
    view.addGestureRecognizer(leftSwipe)
    view.addGestureRecognizer(rightSwipe)
    view.addGestureRecognizer(upSwipe)
    view.addGestureRecognizer(downSwipe)
}


func didViewSwipe(_ sender:UISwipeGestureRecognizer) {
    let location = sender.location(in: view)
    let touchedView = view.hitTest(location, with: nil)

    // Ignore swipes if targetView was swiped
    if touchedView == targetView {
        print("YO YO YO")
    }
}
}

---

您可以使用

UIView

方法获取手势位置下的子视图

func swipe(_ recognizer: UISwipeGestureRecognizer)
{
    let location = recognizer.location(in: self)
    let touchedView = self.hitTest(location, with: nil)
}

---

您可以使用

UIView

方法获取手势位置下的子视图

func swipe(_ recognizer: UISwipeGestureRecognizer)
{
    let location = recognizer.location(in: self)
    let touchedView = self.hitTest(location, with: nil)
}

---

谢谢

self

应该是父视图还是子视图？父视图；这在刷卡手势的处理程序中。Hmmm似乎不起作用？更新了问题以便您可以查看代码。谢谢！

self

应该是父视图还是子视图？父视图；这在刷卡手势的处理程序中。Hmmm似乎不起作用？更新了问题，以便您可以查看代码。