屏幕上同时有两个相同的节点 Swift SpriteKit

Question

I am creating a space shooter game. I have created an enemy node. What I want to do is have 4 of those nodes in each corner of the screen. In other words, I want to spawn multiple copies of the same node at the same time. When the game loads, I want there to be four nodes, that are all the same. How can I do this?

Thanks

Answer 1

Here's a section of code I use to generate a row of 4 space invaders. I reuse the same SKSpriteNode() variable as once the node has been added to the scene, the variable is no longer required:

    for invaderPosition in 100.stride(to: 500, by: 120) {
        invader = SKSpriteNode(texture: texturesA[0])
        invader.position = CGPoint(x: CGFloat(invaderPosition), y: 200)
        invader.xScale = 8
        invader.yScale = 6
        invader.color = SKColor.redColor()
        invader.colorBlendFactor = 1.0
        invader.name = "InvaderA"
        invader.texture = texturesA[1]
          invader.runAction(SKAction.repeatActionForever(SKAction.animateWithTextures(texturesA, timePerFrame: self.timePerMove)))
        addChild(invader)
    }

invader is defined as an SKSpriteNode property. texturesA is just an array of SKTextures ; timePerMove is just a time interval after which the invader should move (in Update ) and change shape(texture).

var invader = SKSpriteNode()
var texturesA:[SKTexture] = []
let timePerMove: CFTimeInterval = 1.0

So you could do something similar except the invader's positions would be the 4 corners rather than a row.

Answer 2

只需使用复制命令，

let newNode = originalNode.copy() as! SKSpriteNode;