Question

每当我点击UIPickeView中的某个项目时，我想触发点按手势。

我使用以下代码进行LongPress Gesture工作正常。但是，如果我切换到UITapGestureRecognizer，则不会触发任何内容。

完整的代码更新！

 @IBOutlet weak var showClaims: UIPickerView!

    override func viewDidLoad() {

        super.viewDidLoad()
showClaims.isUserInteractionEnabled = true
        let tapped = UITapGestureRecognizer(target: self, action: #selector(ClaimVC.SelectClaimInfo))

        showClaims.addGestureRecognizer(tapped)
}


func SelectClaimInfo() {
        GetClaimInfo()
}

Answer 1

我相信评论中的@dfd是正确的。

示例：

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

private func setupTapGesture()
{
    let tapGesture = UITapGestureRecognizer(target: self,
                                            action: #selector(myVC.doStuff(_:)))
    view.addGestureRecognizer(tapGesture)
}

func doStuff(gesture: UITapGestureRecognizer) {}

你确实错过了：

view.addGestureRecognizer(tapGesture)

更新：检查来自此SO的touchesBegan：touchesBegan Swift 3.0 有了它，您可以检查您的UIPicker是否正确地重新启动了触摸器。

Answer 2

对于谁来点击手势不为他们工作，直到做出一切：

let tap = UITapGestureRecognizer(target: self, action:#selector(self.handleTap(_:)))
myView.addGestureRecognizer(tap)

尝试符合UIGestureRecognizerDelegate然后 mKE tap.delegate = self，您必须实施此UIGestureRecognizerDelegate方法使

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

swift Tap Gesture不会触发

2 个答案: