swift类型类没有成员函数

我创建了这个函数sayHello，它每4秒调用一次。这方面的代码是：

_ = NSTimer.scheduledTimerWithTimeInterval(0.4, target: self, selector: #selector(GameScene.sayHello(_:)), userInfo: nil, repeats: true)

}
func sayHello(Enem: SKSpriteNode) {
}

但是，当我将变量Enem添加到此函数时：

 _ = NSTimer.scheduledTimerWithTimeInterval(0.4, target: self, selector: #selector(GameScene.sayHello(_:)), userInfo: nil, repeats: true)
sayHello()

}
func sayHello() {

    let array = [Enemy(imageNamed: "Slide 2"),Enemy(imageNamed: "Slide 1"),Enemy(imageNamed: "Slide 3"),Enemy(imageNamed: "Slide 4"),Enemy(imageNamed: "Slide 5"),Enemy(imageNamed: "Slide 6"),Enemy(imageNamed: "Slide 7"),Enemy(imageNamed: "Slide 8"),Enemy(imageNamed: "Slide 9"),Enemy(imageNamed: "Slide 10")]
    var level0 = Enemy(imageNamed: "Slide 1")
    let level2 = SKSpriteNode(imageNamed: "Slide 2")
    let level3 = SKSpriteNode(imageNamed: "Slide 3")
    let level4 = SKSpriteNode(imageNamed: "Slide 4")
    let level5 = SKSpriteNode(imageNamed: "Slide 5")
    let level6 = SKSpriteNode(imageNamed: "Slide 6")
    let level7 = SKSpriteNode(imageNamed: "Slide 7")
    let level8 = SKSpriteNode(imageNamed: "Slide 8")
    let level9 = SKSpriteNode(imageNamed: "Slide 9")
    let level10 = SKSpriteNode(imageNamed: "Slide 10")
    var touchLocation = CGPoint?()
    var slide = arc4random_uniform(10)
    let level1 = Int(arc4random_uniform(UInt32(array.count)))
    let Enem = array[level1]
    //moveEnem(Enem)
    (string: "\(level1)")

    print("sayhdkl")
    Enem.position = CGPoint(x: 540, y: 320 )
    Enem.physicsBody = SKPhysicsBody(texture: Enem.texture!, size: Enem.size)
    Enem.physicsBody?.dynamic = true
    Enem.physicsBody?.categoryBitMask = BodyType.level1
    Enem.physicsBody?.collisionBitMask = 0
    Enem.zPosition = 12
    addChild(Enem)

我在电话里听到一个错误

\u=NSTimer.scheduledTimerWithTimeInterval（0.4，目标：self，选择器：#选择器（GameSecene.sayHello（：）），用户信息：nil，重复：true）

---

它说类型游戏场景没有成员sayHello。有人能解释一下为什么现在会发生这种情况，因为我很困惑。

您需要更改选择器语法，您的函数没有参数，所以您需要像这样编写选择器

NSTimer.scheduledTimerWithTimeInterval(0.4, target: self, selector: #selector(GameScene.sayHello()), userInfo: nil, repeats: true)

---

是的，尽管出现了一个新的错误：“在类型GameSecene上使用实例成员sayHello您是不是想在NSTimery中的“GameSecene”上使用类型GameSecene的值”，如下面的

#选择器（GameSecene.sayHello）