1
SKAction.group([moveToAction, SKAction.fadeAlphaTo(1.0, duration: 0.2)]), completion:nil)
}
runAction(SKAction.waitForDuration(0.2), completion: completion)
当我这样做,我得到的错误:零不符合预期的参数类型不兼容“() - >虚空”
nil is not compatible with expected argument type '() -> Void'