// 照明效果
let lightMyNode = SKLightNode()
lightMyNode.enabled = true
lightMyNode.lightColor = UIColor.yellowColor()
lightMyNode.position = CGPoint(x: size.width/2.0, y: size.height/2.0)
lightMyNode.categoryBitMask = 0xffffffff
spriteNode1.lightingBitMask = 0x1
self.addChild(lightMyNode)
如上是照明效果的设置,默认的照明效果很小,所以很有可能位置远一点就一片漆黑了==