ios - 如何在离开 SpriteKit 场景后删除 SKNode

Question

我正在 SpriteKit 中构建一个游戏，玩家试图避免与物体发生碰撞。对象每 3 到 5 秒创建一次，我正试图找出一种方法，一旦它与屏幕底部发生碰撞，就从父对象中删除，但由于某种原因，当它发生时它会进入游戏结束请看下面的横向代码.

import SpriteKit

class PlayScene: SKScene, SKPhysicsContactDelegate {

enum ColliderType: UInt32 {

    case none = 0
    case player1 = 1
    case object = 2
    case border = 4
    case remove = 8
}

gameOver = false

let ground = SKNode()
    ground.position = CGPoint(x: 0, y: 0)
    ground.physicsBody = SKPhysicsBody(rectangleOf: CGSize(width: self.frame.size.width + 500, height: 1))
    ground.physicsBody?.isDynamic = false

    ground.physicsBody?.categoryBitMask = ColliderType.remove.rawValue
    ground.physicsBody?.contactTestBitMask = ColliderType.object.rawValue
    ground.physicsBody?.collisionBitMask = ColliderType.none.rawValue

character1.physicsBody!.categoryBitMask = ColliderType.player1.rawValue
    character1.physicsBody!.contactTestBitMask = ColliderType.object.rawValue
    character1.physicsBody!.collisionBitMask = ColliderType.object.rawValue | ColliderType.border.rawValue

object1.physicsBody!.categoryBitMask = ColliderType.object.rawValue
        object1.physicsBody!.contactTestBitMask = ColliderType.player1.rawValue | ColliderType.remove.rawValue
        object1.physicsBody!.collisionBitMask = ColliderType.player1.rawValue | ColliderType.border.rawValue | ColliderType.object.rawValue

if contact.bodyA.categoryBitMask == ColliderType.object.rawValue || contact.bodyB.categoryBitMask == ColliderType.object.rawValue {

gameOver == true
}

if contact.bodyA.categoryBitMask == ColliderType.remove.rawValue || contact.bodyB.categoryBitMask == ColliderType.remove.rawValue {


            object1.removeFromParent()
// it runs this code as well as code above collision object with object but i want contact remove with object
}

Answer 1

尝试在未来发布您的完整代码，而不是将一些随机的代码拼凑在一起。

您的碰撞代码没有多大意义。它应该看起来更像这样，你检查 player->object and object->remove 或者反之亦然

func didBegin(_ contact: SKPhysicsContact) {

    let firstBody: SKPhysicsBody
    let secondBody: SKPhysicsBody

    // This way you only need to do 1 if statement for each collision.
    if contact.bodyA.categoryBitMask < contact.bodyB.categoryBitMask {
        firstBody = contact.bodyA
        secondBody = contact.bodyB
    } else {
        firstBody = contact.bodyB
        secondBody = contact.bodyA
    }


    // Player hit Object or Object hit Player
    if (firstBody.categoryBitMask == ColliderType.player.rawValue) && (secondBody.categoryBitMask == ColliderType.object.rawValue) {

        gameOver == true
    }

    // Object hit Remove or Remove hit Object
    if (firstBody.categoryBitMask == ColliderType.object.rawValue) && (secondBody.categoryBitMask == ColliderType.remove.rawValue) {

        // Remove object
        firstBody.node?.removeFromParent()
    }
}

我建议你阅读更多关于 sprite kit collision 的教程，如果这让你感到困惑，有很多可用的。

希望对你有帮助