iphone - 联系后尝试隐藏节点

Question

我有一个 SKSprite 节点，我想让它在联系后消失。我尝试设置 .hidden = true 但这不起作用

var coin = SKSpriteNode()
//MARK: SKPhysicsContactDelegate methods

func didBeginContact(contact: SKPhysicsContact) {

    if (contact.bodyA.categoryBitMask == userCategory) && (contact.bodyB.categoryBitMask == objectCategory) {

        gameOver = 1
        movingObjects.speed = 0
        presentGameOverView()

    } else if (contact.bodyA.categoryBitMask == userCategory) && (contact.bodyB.categoryBitMask == coinCategory) {

        println("scoring")
        //code to hide node
        coin.hidden = true //not working

    }
}

}

Answer 1

SKPhysicsBody 有一个名为 node 的属性。可以在 didContactBegin 函数内部访问它以隐藏节点。

func didBeginContact(contact: SKPhysicsContact) {

    if (contact.bodyA.categoryBitMask == userCategory) && (contact.bodyB.categoryBitMask == coinCategory) {

        println("scoring")
        //code to hide node
        contact.bodyB.node?.hidden = true // Changed

    }
}