如何让 UIGestureRecognizer 与手动添加的子视图一起工作

Question

我以编程方式制作了一个子视图，它显示在我的主视图中。它还有一个单独的视图控制器。虽然我的 gestureRecognizers 在主视图中的 UIImageViews 上工作，但它们在我的子视图中不起作用。

这是我在主视图控制器中的内容：

var hVC: HandViewController = HandViewController()

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

func createHandImageView() {
    addChildViewController(hVC)
    let w: CGFloat = cardWidth + ((hVC.maxHandCards-1) * hVC.handCardSep)
    let h: CGFloat = cardHeight
    let screenWidth = view.frame.size.width
    let screenHeight = view.frame.size.height
    let x: CGFloat = (screenWidth - w) / 2
    let frame = CGRectMake(x, screenHeight - cardHeight - 20, w, h)
    hVC.view = UIImageView(frame: frame)
    hVC.view.backgroundColor = UIColor(white: 0, alpha: 0.3)
    // This is where I add the Hand View that eventually holds the card views
    view.addSubview(hVC.view)
    hVC.didMoveToParentViewController(self)
}

和子视图控制器：

init() {
    super.init(nibName: nil, bundle: nil)
}

required init?(coder aDecoder: NSCoder) {
    super.init(coder: aDecoder)
}

override func viewDidLoad() {
    super.viewDidLoad() // This NEVER fires
    NSLog("did load");
}

func updateHandCardsView(cards: [Int]) {
    handCardViews = [];
    for card in cards {
        addNewHandCardImage(card)
    }
}

func addNewHandCardImage(card: Int) {
    let imageView  = UIImageView(frame:CGRectMake(0, 0, cardWidth, cardHeight));
    imageView.image = UIImage(named: Deck.getCardName(card))
    // This is where I add each Card View to the Hand View
    self.view.addSubview(imageView)
    handCardViews.append(imageView)
    addEventRecognizers(imageView)
}

func addEventRecognizers(view: UIImageView) {
    let singleTap = UITapGestureRecognizer(target: self, action: "highlightCard:")
    singleTap.numberOfTapsRequired = 1
    singleTap.numberOfTouchesRequired = 1
    view.userInteractionEnabled = true
    view.addGestureRecognizer(singleTap)

    let doubleTap = UITapGestureRecognizer(target: self, action: "playCard:")
    doubleTap.numberOfTapsRequired = 2
    doubleTap.numberOfTouchesRequired = 1
    view.userInteractionEnabled = true
    view.addGestureRecognizer(doubleTap)
}

所有卡片视图都显示在手牌视图中。全部以编程方式创建。当我将手势代码复制并粘贴到主视图中并在 table 上的卡片上使用它时，会调用操作，但不会在子视图 (HandView) 中调用。

我错过了什么？

Answer 1

手势识别器仅适用于它们所属的视图。有一个 UIView 方法可以添加手势识别器。您的 addEventRecognizers 只是向传入的任何 UIImageView 添加识别器。您应该更改函数调用以接受 UIView，因为 UIImageView 只是 UIView 的一个子类，它仍然适用于您的图像。然后调用

addEventRecognizers(HandView) //Pass in the view that will get set with gesture recognizer.

或者，如果您只想添加一个手势识别器，只需调用 HandView.addGestureRecognizer(gesture)

如何让 UIGestureRecognizer 与手动添加的子视图一起工作

How can I get UIGestureRecognizer to work with manually added subviews

uiviewcontroller

ios

uitapgesturerecognizer

swift

swift2