知道 skspritenode 已经完全移过另一个 skspritenode

Question

我试图找出一个 SKSpriteNode 已完全迭代另一个 SKSpriteNode。 这是我目前想出的代码，

if (node.frame.maxY == player.frame.minY) {
    player.physicsBody?.collisionBitMask = collisionTypes.vortex.rawValue
}

我知道这很简单，但我在这里迷路了。

Answer 1

设置两个对象的contactTestBitMask 属性。然后在 didBegin 函数中检测它们何时发生碰撞，然后在 didEnd 函数中检测它们何时停止碰撞

player.physicsBody?.contactTestBitMask = collisionTypes.bullet.rawValue
bullet.physicsBody?.contactTestBitMask = collisionTypes.player.rawValue

func didBegin(_ contact: SKPhysicsContact) {
    //detect your collision and do what you need to do
    //maybe set a bool to true if you have multiple collision types
}

func didEnd(_ contact: SKPhysicsContact) {
    //check that the above collison is the one that ended
    //run appropriate code for end collision
}