NSPressGestureRecognizer 在 minimumPressDuration 之前调用

Question

我需要 NSButton 响应常规点击和长按。我像这样添加 NSPressGestureRecognizer：

override func viewDidLoad() {
    super.viewDidLoad()

    let gr = NSPressGestureRecognizer()
    gr.minimumPressDuration = 1
    gr.action = #selector(handleLongPress)
    button.addGestureRecognizer(gr)  
}

func handleLongPress(gr: NSPressGestureRecognizer) {

    if gr.state == .Began {
        Swift.print("long press")
    }

}

不幸的是，handleLongPress 即使在短暂的单击或双击时也会随机触发。即使我将 minimumPressDuration 设置为更高的值也会发生这种情况。

我试过 shouldBeRequiredToFailByGestureRecognizer 但它没有解决问题。

我的代码是否遗漏了什么？

Answer 1

我已经通过处理多个手势识别器解决了这个问题：

class 必须实施 NSGestureRecognizerDelegate

var singleClick:NSClickGestureRecognizer?
var longClick:NSPressGestureRecognizer?

override func viewDidLoad() {
    super.viewDidLoad()

    longClick = NSPressGestureRecognizer()
    longClick!.minimumPressDuration = 1
    longClick!.action = #selector(handleGestureLong)
    longClick!.delegate = self

    singleClick = NSClickGestureRecognizer()
    singleClick?.numberOfClicksRequired = 1
    singleClick!.action = #selector(handleGestureSingle)
    singleClick!.delegate = self

    btn.addGestureRecognizer(longClick!)
    btn.addGestureRecognizer(singleClick!)

}

func gestureRecognizer(gestureRecognizer: NSGestureRecognizer, shouldRequireFailureOfGestureRecognizer otherGestureRecognizer: NSGestureRecognizer) -> Bool {
    if gestureRecognizer == singleClick && otherGestureRecognizer == longClick {
        return false
    }
    return true
}

func handleGestureSingle(gr: NSClickGestureRecognizer) {

    switch gr.state {

    case .Ended:
        print("single click")
        break
    default:
        break

    }
}

func handleGestureLong(gr: NSPressGestureRecognizer) {

    switch gr.state {

    case .Began:
        print("long click")
        break
    default:
        break

    }
}