SKSpriteNode - 不同的精灵但功能相同

Question

基本上我有这个代码只适用于 "bubble1"。如果我想再有一个泡泡，是否需要创建许多相同类型的函数，"bubble2"

   func addBubbles() {


    let bubble1 = SKSpriteNode(imageNamed: "bubble_purple")

    //the new one I want to create
    let bubble2 = SKSpriteNode(imageNamed: "bubble_green")


    bubble1.name = "bubble1"
    bubble1.physicsBody = SKPhysicsBody(circleOfRadius: bubble1.size.width * 0.5, center: CGPointZero)

    bubble2.name = "bubble2"
    bubble2.physicsBody = SKPhysicsBody(circleOfRadius: bubble1.size.width * 0.5, center: CGPointZero)


    physicsWorld.contactDelegate = self
    physicsWorld.gravity = CGVectorMake(0, 0)



    //Physics implementation of the bubbles
    bubble1.physicsBody?.dynamic = true
    bubble1.physicsBody?.usesPreciseCollisionDetection = true
    bubble1.physicsBody?.categoryBitMask = PhysicsCategory.Bubble
    bubble1.physicsBody?.contactTestBitMask = PhysicsCategory.Cones
    bubble1.physicsBody?.collisionBitMask = 0
    bubble1.physicsBody?.allowsRotation = false

Answer 1

只需创建一个扩展 SKSpriteNode

的气泡 class

class Bubble : SKSpriteNode
{
    convenience init(imageNamed name:String)
    {
        let texture = SKTexture(imageNamed:named)
        self.init(texture:texture,color:UIColor.clearColor(),size: texture!.size())
        self.physicsBody = SKPhysicsBody(circleOfRadius: self.size.width * 0.5, center: CGPointZero)

        //Physics implementation of the bubbles
        self.physicsBody?.dynamic = true
        self.physicsBody?.usesPreciseCollisionDetection = true
        self.physicsBody?.categoryBitMask = PhysicsCategory.Bubble
        self.physicsBody?.contactTestBitMask = PhysicsCategory.Cones
        self.physicsBody?.collisionBitMask = 0
        self.physicsBody?.allowsRotation = false
    }
}

那么就这样调用你的泡泡：

var bubble1 = Bubble(imageNamed:"bubble_purple")
bubble1.name = "bubble1"
var bubble2 = Bubble(imageNamed:"bubble_green")
bubble2.name = "bubble2"

这样做会覆盖以前的便捷方法，并且不允许您轻松地将其扩展到 classes，因此我建议创建一个新方法来初始化您的精灵以防万一你确实需要扩展这个 init 的功能，像这样：

     init(named:String)
    {
        let texture = SKTexture(imageNamed:named)
        super.init(texture:texture,color:UIColor.clearColor(),size: texture!.size())
        self.physicsBody = SKPhysicsBody(circleOfRadius: self.size.width * 0.5, center: CGPointZero)

        //Physics implementation of the bubbles
        self.physicsBody?.dynamic = true
        self.physicsBody?.usesPreciseCollisionDetection = true
        self.physicsBody?.categoryBitMask = PhysicsCategory.Bubble
        self.physicsBody?.contactTestBitMask = PhysicsCategory.Cones
        self.physicsBody?.collisionBitMask = 0
        self.physicsBody?.allowsRotation = false
    }

并这样称呼你的泡泡：

var bubble1 = Bubble(named:"bubble_purple")
bubble1.name = "bubble1"
var bubble2 = Bubble(named:"bubble_green")
bubble2.name = "bubble2"

SKSpriteNode - 不同的精灵但功能相同

SKSpriteNode - Different sprites but same function

ios

sprite-kit

skphysicsbody