ios - 背景 block 粒子效果

Question

我向我的应用程序添加了背景和爆炸粒子效果。背景和 Sprite 一起工作得很好，但爆炸效果出现在背景后面。背景的 zposition 设置为零，一些帮助是合法的。

   background = SKSpriteNode(imageNamed: "Starfield")
    background.size = CGSize(width: 430, height: 700)
    background.position = CGPoint(x: self.frame.width / 2, y: self.frame.height / 2 )
    self.addChild(background)
    background.zPosition = 0

func explosion(pos: CGPoint) {
    var emitterNode = SKEmitterNode(fileNamed: "Explosion.sks")
    emitterNode!.particlePosition = pos
    self.addChild(emitterNode!)
    // Don't forget to remove the emitter node after the explosion
    self.runAction(SKAction.waitForDuration(2), completion: { emitterNode!.removeFromParent() })

}

Answer 1

这是为有需要的人提供的解决方案。

func explosion(pos: CGPoint) {
    var emitterNode = SKEmitterNode(fileNamed: "Explosion.sks")
    emitterNode!.particlePosition = pos
    self.addChild(emitterNode!)
    // Don't forget to remove the emitter node after the explosion
    self.runAction(SKAction.waitForDuration(2), completion: { emitterNode!.removeFromParent() })
emitterNode?.zPosition = 2

}