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问SKSpriteNode -不同的精灵但功能相同
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Stack Overflow用户

提问于 2015-11-20 14:38:18

回答 1查看 38关注 0票数 0

基本上，我的代码只适用于"bubble1“。如果我想要有另一个泡泡"bubble2“，是否需要创建相同类型的许多函数？

   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

ios

sprite-kit

skphysicsbody

回答 1

Stack Overflow用户

回答已采纳

发布于 2015-11-20 15:13:05

只需创建一个扩展SKSpriteNode的冒泡类

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
    }
}

那就这样叫你的泡泡吧：

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

这样做将覆盖以前的方便方法，并且不允许您轻松地将其扩展到更多的类，因此，我建议创建一个新的方法来初始化您的精灵，以防您确实需要扩展这个init的特性，如下所示：

     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
    }

像这样叫你的泡泡：

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

票数 1

页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持

原文链接：

https://stackoverflow.com/questions/33829332

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