[英]How to change the fillColor of a SKShapeNode within the didBegin contact function?
My goal is to change the fillColor of a SKShapeNode as soon as that node collides with another Node.我的目标是在 SKShapeNode 与另一个节点发生碰撞时立即更改该节点的 fillColor。 I do know how to edit the physics body at the point of collision but I couldn't manage to figure out how to change properties like fill- or strokeColor of a Node.
我确实知道如何在碰撞点编辑物理体,但我无法弄清楚如何更改节点的填充或描边颜色等属性。
The SKShapeNode: SKShapeNode:
func addBrick() -> SKShapeNode {
let brick = SKShapeNode(rect: CGRect(x: -100, y: -20, width: 200, height: 40), cornerRadius: 20)
brick.fillColor = .blue
brick.strokeColor = .blue
brick.physicsBody = SKPhysicsBody(rectangleOf: CGSize(width: 200, height: 40))
brick.position = CGPoint(x: 0, y: -50)
brick.zPosition = 2
brick.physicsBody?.categoryBitMask = BrickCategory
brick.physicsBody?.collisionBitMask = PlayerCategory
brick.physicsBody?.contactTestBitMask = PlayerCategory
return brick
}
Then I test the contact between the player and the brick:然后我测试玩家和积木之间的接触:
func didBegin(_ contact: SKPhysicsContact) {
let contactMask = contact.bodyA.categoryBitMask | contact.bodyB.categoryBitMask
switch contactMask {
case PlayerCategory | BrickCategory:
print("")
default:
print("Unknown collision")
}
}
I do know that I can make changes to the physics body itself by using我知道我可以通过使用来改变物理体本身
contact.bodyB.node?.//make changes here
, but I don't know how to change the fillColor of bodyB for example to red. ,但我不知道如何将 bodyB 的 fillColor 例如更改为红色。
I appreciate your help!我感谢您的帮助!
If you have an SKNode
node
that you know should be an SKShapeNode
, then you can cast it like:如果您有一个您知道应该是
SKShapeNode
的SKNode
node
,那么您可以将其转换为:
if let shapeNode = node as? SKShapeNode {
shapeNode.fillColor = .red
}
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