同時解析UITapGestureRecognizer和UILongPressGestureRecognizer並觸發UIGestureRecognizer.State。

Question

首先，所有已經回答的問題都對我沒有幫助

1. Swift：長按手勢識別器-檢測水龍頭和長按
2. 在表格視圖中同時使用輕擊手勢和長按
3. 長按手勢識別器僅在手指松開時觸發
4. 等等

該代碼幾乎可以正常工作，只有一件事：長按手勢僅在我將手指從屏幕上抬起時調用。 但是我需要表現出類似Instagram Stories中的行為（當您可以在故事之間切換並按住手指來暫停某些故事時）。

我的問題更多是關於當用戶觸摸手指而不是手指時如何強制UILongPressGesture觸發。

這是我的代碼：

private func setupTapGestures() {
    tapRecognizer = UITapGestureRecognizer()
    tapRecognizer?.addTarget(self, action: #selector(handleTapGesture(_:)))
    tapRecognizer?.delegate = self
    view.addGestureRecognizer(tapRecognizer!)

    longPressRecognizer = UILongPressGestureRecognizer()
    longPressRecognizer?.addTarget(self, action: #selector(handleLongPressGesture(_:)))
    longPressRecognizer?.minimumPressDuration = 0.1
    longPressRecognizer?.delegate = self
    view.addGestureRecognizer(longPressRecognizer!)
}

@objc func handleTapGesture(_ gestureRecognizer: UIGestureRecognizer) {
    let width = view.frame.width
    let point = gestureRecognizer.location(in: view)
    viewModel?.tapAction(viewWidth: width, tapPoint: point)
    Swift.print("Tap gesture")
}

@objc func handleLongPressGesture(_ gestureRecognizer: UILongPressGestureRecognizer) {
    if gestureRecognizer.state == .began {
        Swift.print("Began")
    } else if gestureRecognizer.state == .ended {
        Swift.print("Ended")
    }
}

UIGestureRecognizerDelegate ：

func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRequireFailureOf otherGestureRecognizer: UIGestureRecognizer) -> Bool {
    // Don't recognize a single tap until a long-press fails
    if gestureRecognizer == tapRecognizer && otherGestureRecognizer == longPressRecognizer {
        return true
    }
    return false
}

shouldRequireFailureOf文檔

有什么建議或想法嗎？

Answer 1

我想知道您的shouldRequireFailureOf實施是否引起問題？

這對我來說效果很好（請注意：我使用.minimumPressDuration = 0.25因為在0.1秒內.minimumPressDuration = 0.25它有點困難）：

class GestureTestViewController: UIViewController {

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

    private func setupTapGestures() -> Void {

        let singleTapGesture = UITapGestureRecognizer(target: self, action: #selector(handleTapGesture(_:)))
        view.addGestureRecognizer(singleTapGesture)

        let longPressGesture = UILongPressGestureRecognizer(target: self, action: #selector(handleLongPressGesture(_:)))
        longPressGesture.minimumPressDuration = 0.25
        view.addGestureRecognizer(longPressGesture)

    }

    @objc func handleLongPressGesture(_ gesture: UILongPressGestureRecognizer) -> Void {
        if gesture.state == .began {
            print("Did Long Press (began)")
        }
        if gesture.state == .ended {
            print("Did Long Press (ended)")
        }
    }

    @objc func handleTapGesture(_ gesture: UITapGestureRecognizer) -> Void {
        print("Did Single Tap")
    }

}

點擊時 ，在調試控制台中顯示“ Did Single Tap” 。

按住時 ，我很快會收到“開始長按（開始）”的信息 ，而在手指抬起時得到“長按（結束）的”信息