Swift - 如何将点击手势添加到 UIViews 数组? [英] Swift - How to add tap gesture to array of UIViews?

问题描述

希望将点击手势添加到 UIView 的数组中 - 没有成功.在此阶段似乎无法识别 Tap.

Looking to add a tap gesture to an array of UIViews - without success. Tap seems not to be recognised at this stage.

在下面的代码(摘录)中:在主视图上显示一系列 PlayingCardViews(每个都是一个 UIView).集合为一个数组:cardView.需要能够独立点击每个 PlayingCardView(然后能够识别点击了哪个).

In the code (extract) below: Have a series of PlayingCardViews (each a UIView) showing on the main view. Brought together as an array: cardView. Need to be able to tap each PlayingCardView independently (and then to be able to identify which one was tapped).

@IBOutlet private var cardView: [PlayingCardView]!


override func viewDidLoad() {
    super.viewDidLoad()
    let tap = UITapGestureRecognizer(target: self, action: #selector(tapCard(sender: )))
    for index in cardView.indices {
        cardView[index].isUserInteractionEnabled = true
        cardView[index].addGestureRecognizer(tap)
        cardView[index].tag = index
    }
}

@objc func tapCard (sender: UITapGestureRecognizer) {
    if sender.state == .ended {
        let cardNumber = sender.view.tag
        print("View tapped !")
    }
}

推荐答案

您需要

@objc func tapCard (sender: UITapGestureRecognizer) { 
     let clickedView = cardView[sender.view!.tag] 
     print("View tapped !" , clickedView ) 
}

这里不需要检查状态，因为这种手势类型的方法只被调用一次，而且每个视图都应该有一个单独的点击，所以在 for 循环中创建它

No need to check state here as the method with this gesture type is called only once , also every view should have a separate tap so create it inside the for - loop

for index in cardView.indices  { 
   let tap = UITapGestureRecognizer(target: self, action: #selector(tapCard(sender: )))

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