ios - TouchesEnded 被称为其他按钮被点击并取消其他操作

Question

当玩家按住按钮四处移动然后按下射击按钮时，会调用 TouchesEnded，然后取消玩家的移动。这两个操作单独工作，但当它们同时被调用时则不会。

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    super.touchesBegan(touches, with: event)

    if let touch = touches.first {
        let location = touch.location(in: self)

        let objects = nodes(at: location)
        for node in objects {
            if node.name == "leftBtn" {
                player.run(player.leftMovement, withKey: "leftMovement")
            } else if node.name == "rightBtn" {
                player.run(player.rightMovement, withKey: "rightMovement")
            } else if node.name == "upBtn" {
                let jump = SKAction.applyImpulse(CGVector(dx: 0, dy: 1000), duration: 0.2)
                player.run(jump, withKey: "jump")
            } else if node.name == "downBtn" {
                let downMovement = SKAction.applyImpulse(CGVector(dx: 0, dy: -500), duration: 0.2)
                player.run(downMovement, withKey: "downMovement")
            } else if node.name == "shootBtn" {
                player.shoot()
            }
        }
    }
}

override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {

    player.removeAction(forKey: "leftMovement")
    player.removeAction(forKey: "rightMovement")
    player.removeAction(forKey: "jump")
    player.removeAction(forKey: "downMovement")
}

我希望这两个操作独立于另一个操作，但不幸的是，事实并非如此。

Answer 1

这可能是因为当您触摸拍摄按钮时，touchesEnded 也会被调用，这将取消您的所有 Action 。

与您在 touchesBegan 方法中检查哪些节点被触摸的方式类似，您需要在 touchesEnded 中检查拍摄按钮是否被按下:

override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
    if let touch = touches.first {
        let location = touch.location(in: self)

        let objects = nodes(at: location)
        for node in objects {
            if ["leftBtn", "rightBtn", "upBtn", "downBtn"].contains(node.name) {
                player.removeAction(forKey: "leftMovement")
                player.removeAction(forKey: "rightMovement")
                player.removeAction(forKey: "jump")
                player.removeAction(forKey: "downMovement")
            }
        }
    }