Swift -显示术语"inView“的错误

Question

import SpriteKit
import UIKit
import Foundation

class GameScene: SKScene {

let coin = Coin()

    override func didMoveToView(view: SKView) {
    /* Setup your scene here */
        coin.coinFlip(inView view: UIView)

        }

override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
   /* Called when a touch begins */
       }

override func update(currentTime: CFTimeInterval) {
    /* Called before each frame is rendered */
}
}

Xcode不会让我把"coinFlip“函数放进去！它说我必须在"inView“后面加一个逗号，然后它说”使用未解析的标识符'inView'“。在这种情况下我该怎么办？