Question

我正在尝试使用UIPanGesture平移SKSpriteNode，问题是运动太快了（距离远大于手指的运动，下面是代码。我怀疑我添加了当前位置后出现了问题和翻译。非常感谢您的帮助。

@objc func panGestureHandler(_ recognizer: UIPanGestureRecognizer) {

    if recognizer.state == .began {
        print("Touchdown")
        var touchLocation = recognizer.location(in: recognizer.view)
        touchLocation = self.convertPoint(fromView: touchLocation)

        if (self.atPoint(touchLocation) is SKSpriteNode){
            selectedNode = self.atPoint(touchLocation) as! SKSpriteNode
        } else {
            recognizer.state = .failed 
        }


    } else if recognizer.state == .changed {

        var translation = recognizer.translation(in: recognizer.view!)
        translation = CGPoint(x: translation.x, y: -translation.y)
        let position = selectedNode.position
        selectedNode.position = CGPoint(x: position.x + translation.x, y: position.y + translation.y)
        recognizer.setTranslation(CGPoint.zero, in: recognizer.view)

    } else if recognizer.state == .ended {
        recognizer.setTranslation(CGPoint.zero, in: recognizer.view)
    }
}

Answer 1

这是最终代码：

 @objc func panGestureHandler(_ recognizer: UIPanGestureRecognizer) {
    var touchLocation = recognizer.location(in: recognizer.view)
    touchLocation = self.convertPoint(fromView: touchLocation)
    if recognizer.state == .began {
        print("Touchdown")

        if (self.atPoint(touchLocation) is SKSpriteNode){
            selectedNode = self.atPoint(touchLocation) as! SKSpriteNode
        } else {
            recognizer.state = .failed 
        }


    } else if recognizer.state == .changed {

        var translation = recognizer.translation(in: recognizer.view!)
        //translation = self.convertPoint(fromView: translation)

        translation = CGPoint(x: translation.x, y: -translation.y)


        selectedNode.position = CGPoint(x: pos.x + translation.x, y: pos.y + translation.y)
        recognizer.setTranslation(CGPoint.zero, in: recognizer.view)
         pos = touchLocation

    } else if recognizer.state == .ended {
        recognizer.setTranslation(CGPoint.zero, in: recognizer.view)
    }
}

Knight0fDragon，即使在更改状态下，您也是需要连接的翻译。 0x141E感谢您解释翻译。

将UIPanGesture与SpriteKit结合使用

1 个答案: