平移手势与轻拍手势的冲突

Question

我目前正在开发一个使用UIGestureRecognizers的游戏。我使用平移手势来移动播放器，使用轻击手势来检测其他UI按钮的触摸。除了两个手势之间有冲突之外，一切似乎都很好。每当玩家在移动(平移手势被识别)时，游戏会忽略我所有的轻击手势(一旦识别了平移手势，视图就不会识别轻拍手势)。谁能告诉我如何让这两个手势一起工作。我想让玩家在点击UI按钮时停止移动。换句话说，每当识别到轻击手势时，我都想取消平移手势。

提前谢谢你！

下面是我如何设置这两个手势：

   let singleTap = UITapGestureRecognizer(target: self, action: #selector(doSingleTap))
    singleTap.numberOfTapsRequired = 1
    singleTap.delegate = self
    self.view?.addGestureRecognizer(singleTap)


   let panGesture = UIPanGestureRecognizer(target: self, action: #selector(handlePan))
    panGesture.minimumNumberOfTouches = 1
    panGesture.delegate = self
    self.view?.addGestureRecognizer(panGesture)


@objc func handlePan(gestureReconizer: UIPanGestureRecognizer) {

    if isPaused || player.isInAction {return}

    let translation = gestureReconizer.translation(in: self.view)

    if gestureReconizer.state == .changed {
        let angle = 180 + (atan2(-translation.x, translation.y) * (180/3.14159))
        player.movementAngle = angle
        player.atState = .Walk
    }
    if gestureReconizer.state == .ended {
        player.movementAngle = 0.0
        if player.atState == .Walk {
            player.atState = .Idle
        }
    }
}



@objc func doSingleTap(gestureReconizer: UITapGestureRecognizer) {

    let originaTapLocation = gestureReconizer.location(in: self.view)

    let location = convertPoint(fromView: originaTapLocation)
    let node = atPoint(location)

        switch node.name {
        case "HeroAvatar":
            //do stuff here
            break

        case "Fire":

            //do stuff here
            break

        case "Potion":
            //do stuff here
            break

        default:
            break
        } 
}

Answer 1

您需要实现UIGestureRecognizerDelegate的委托方法，如下所示：

func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer,
                       shouldRequireFailureOf otherGestureRecognizer: UIGestureRecognizer) -> Bool {

    // Don't recognize a single tap gesture until a pan gesture fails.
    if gestureRecognizer == singleTap &&
        otherGestureRecognizer == panGesture {
        return true
    }
    return false
}

希望这将为您工作:)

有关更多信息，请访问Apple Doc Preferring One Gesture Over Another