如何检测有关精灵纹理的接触

几条路可走:

1. 可以使用节点的 userData 所有物

   bullet.userData = ["type" : "white"]
   

   要访问它:

   println(bullet.userData?["type"])
   

2. 您可以创建作为SKSpriteNode子类的自定义Bullet类,并创建名为“type”的属性,然后在didBeginContact中访问该属性。

   class Bullet: SKSpriteNode {
   
       var type:String = ""
   
   
        init(type:String) {
            self.type = type //later you are accessing this with bulletNode.type
           //This is just an simple example to give you a basic idea  what you can do.
           //In real app you should probably implement some kind of security check to avoid wrong type
           let texture = SKTexture(imageNamed: type)
   
           super.init(texture: texture, color: nil, size: texture.size())
       }
   
       required init(coder aDecoder: NSCoder) {
           fatalError("init(coder:) has not been implemented")
       }
   }
   

3. 您可以使用 bullet.name 属性,并在创建时根据项目符号/块颜色进行适当设置。稍后在didBeginContact中,您将检查 项目符号名称 找出子弹的类型。街区也是如此。

   func spawnBulletWithType(type:String) -> SKSpriteNode{
   
        //set texture based on type
        //you can pass here something like white_bullet
   
        let atlas = SKTextureAtlas(named: "myAtlas")
   
   
        //here, if passed white_bullet string, SpriteKit will search for texture called white_bullet.png
        let bullet = SKSpriteNode(texture:atlas.textureNamed(type))
   
   
        bullet.name = type // name will be white_bullet, and that is what you will search for in didBeginContact
   
        bullet.physicsBody = SKPhysicsBody(texture: bullet.texture, size: bullet.size)
        bullet.physicsBody?.categoryBitMask = PhysicsCategory.Bullet
        bullet.physicsBody?.contactTestBitMask = PhysicsCategory.CgyBlock
        bullet.physicsBody?.collisionBitMask = PhysicsCategory.None
        bullet.physicsBody?.affectedByGravity = false
        bullet.physicsBody?.usesPreciseCollisionDetection = true
   
        return bullet
   }
   

编辑:

根据您最近的评论,您可能会这样做:

let bulletArray = ["redBullet","magentaBullet", "blueBullet", "cyanBullet", "greenBullet", "yellowBullet"]

//didMoveToView:
 var randomBullet = Int(arc4random_uniform(6))
 let bulletType = bulletArray[randomBullet]
 bulletInCannon.name = bulletType
 bulletInCannon = SKSpriteNode(imageNamed: bulletType )
 bulletInCannon.position = CGPointMake(CGRectGetMidX(self.frame), CGRectGetMidY(self.frame))
 addChild(bulletInCannon)


//touchesEnded:
var randomBullet = Int(arc4random_uniform(6))
        bullet = SKSpriteNode(texture: bulletInCannon.texture)
        bullet.name = bulletInCannon.name
        bullet.position = CGPointMake(CGRectGetMidX(self.frame), CGRectGetMidY(self.frame))

        bullet.physicsBody = SKPhysicsBody(texture: bullet.texture, size: self.bullet.size)
        bullet.physicsBody?.dynamic = true
        bullet.physicsBody?.categoryBitMask = PhysicsCategory.Bullet
        bullet.physicsBody?.contactTestBitMask = PhysicsCategory.CgyBlock
        bullet.physicsBody?.collisionBitMask = PhysicsCategory.None
        bullet.physicsBody?.affectedByGravity = false
        bullet.physicsBody?.usesPreciseCollisionDetection = true

        addChild(bullet)
let bulletType = bulletArray[randomBullet]
 bulletInCannon.texture = SKTexture(imageNamed: bulletType)
 bulletInCannon.name = bulletType

首先,您需要为项目符号和块定义一个类 然后,可以定义一个TextureTypes来存储纹理类型(红色、绿色),并将随机方法生成的任何属性设置为该类型的类变量。 然后,您应该管理联系人并找出BodyA和BodyB的节点。之后,可以根据节点的文本类型轻松地进行任何您喜欢的操作,

为了澄清代码,我将纹理定义为新类型

enum TextureTypes: String {
    case Red,Green 
    var description:String {
        switch self {
        case Red:return “Red"
        case Green:return “Green”
        case Green:return “Blue"
        }
    }
}

Blockclass和BulletClass都必须从SKNode继承,因为它们是一个节点!

class BlockClass:SKNode {
    var NodesTexture : TextureTypes = TextureTypes.Red
}

class BulletClass:SKNode {
    var NodesTexture : TextureTypes = TextureTypes.Red
}

将以下代码写入 didBeginContact 方法检测节点的TextureType

    if (contact.bodyA.categoryBitMask == PhysicsCategory.Bullet) &&    
       (contact.bodyB.categoryBitMask == PhysicsCategory.CgyBlock)
    {
        Ablock = (BlockClass *) contact.bodyB.node;
        Abullet = (BulletClass *) contact.bodyA.node;
    }
    if (contact.bodyA.categoryBitMask == PhysicsCategory.CgyBlock) &&    
       (contact.bodyB.categoryBitMask == PhysicsCategory.Bullet)
    {
        Ablock = (BlockClass *) contact.bodyA.node;
        Abullet = (BulletClass *) contact.bodyB.node;
        if ( Ablock.NodesTexture = TextureTypes.Red )
        {
            NSLOG(“A Red Block Detected”)

        }
    } 

不要忘记定义BlocksClass和BulletClass类型的块和项目符号