我希望能够在用户向下滑动时更改节点的physicsBody高度,但除了重置整个物理体外,我还没有找到如何实现此操作。
当我最初加载节点时,我使用以下代码:
nodeHero.color = UIColor .grayColor()
nodeHero.size.width = 20
nodeHero.size.height = 45
nodeHero.position.x = -frame.size.width/2 + 45
nodeHero.position.y = pointMainY + 30 + nodeHero.size.height/2
nodeHero.zPosition = 110
nodeHero.physicsBody = SKPhysicsBody(rectangleOfSize: CGSizeMake(nodeHero.size.width, nodeHero.size.height))
nodeHero.physicsBody?.mass = 1
nodeHero.physicsBody?.angularVelocity = 0
nodeHero.physicsBody?.allowsRotation = false
nodeHero.physicsBody?.restitution = 0
nodeHero.physicsBody?.categoryBitMask = bitHero
addChild(nodeHero)
当我向下滑动时,我希望能够像这样做(此代码无法正常工作):
nodeHero.size.height = 28
nodeHero.physicsBody?.size.height = 28
但是我必须再次使用nodeHero.physicsBody = SKPhysicsBody(),这会重置所有其他的物理体属性,所以我必须执行以下操作:
nodeHero.size.height = 28
nodeHero.physicsBody = SKPhysicsBody(rectangleOfSize: CGSizeMake(nodeHero.size.width, nodeHero.size.height))
nodeHero.physicsBody?.mass = 1
nodeHero.physicsBody?.angularVelocity = 0
nodeHero.physicsBody?.allowsRotation = false
nodeHero.physicsBody?.restitution = 0
nodeHero.physicsBody?.categoryBitMask = bitHero