ios - 如何在 Swift Spritekit 中向我的节点添加触摸和按住手势？

Question

我有这个游戏，我的节点在屏幕中间，如果我按住屏幕的左侧，节点将向左移动，如果我按住屏幕的右侧，节点将移动到正确的。我尝试了一切，但似乎无法让它发挥作用。谢谢! (我有一些代码，但它没有做我想让它做的事情。如果你想看它和它做了什么，我会把它贴出来。)

编辑代码:

    var location = touch.locationInNode(self)

    if location.x < self.size.width/2 {
        // left code
        let moveTOLeft = SKAction.moveByX(-300, y: 0, duration: 0.6)
        hero.runAction(moveTOLeft)
    }
    else {
        // right code
        let moveTORight = SKAction.moveByX(300, y: 0, duration: 0.6)
        hero.runAction(moveTORight)


    }

Answer 1

您必须在每次更新中检查触摸的位置，以确定您希望角色移动的方向。

override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) {
    var touch = touches.first as! UITouch
    var point = touch.locationInView(self)
    touchXPosition = point.x
    touchingScreen = true
}

override func touchesEnded(touches: Set<NSObject>, withEvent event: UIEvent) {
    super.touchesEnded(touches, withEvent: event)
    touchingScreen = false
}

override func update(currentTime: CFTimeInterval) {
    if touchingScreen {
        if touchXPosition > CGRectGetMidX(self.frame) {
            // move character to the right.
        }
        else {
            // move character to the left. 
        }
    }
    else { // if no touches.
        // move character back to middle of screen. Or just do nothing.
    }
}