Xcode 6.1升级 - ViewController不再符合协议WKScriptMessageHandler

Question

我WKScriptMessageHandler在我的iOS应用程序中使用来自Webkit的消息.我正在使用该WKScriptMessageHandler协议,但显然在将Xcode升级到最新的6.1升级后,我现在收到此错误消息:

Type 'ViewController' does not conform to protocol 'WKScriptMessageHandler'

关于如何做到这一点的任何想法？为什么Apple会改变这一点

这是我的代码如下:

import UIKit
import WebKit

class ViewController: UIViewController, WKScriptMessageHandler {

    @IBAction func fourButton(sender: UIButton){
        performSegueWithIdentifier("login", sender: self)
    }

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    func userContentController(userContentController: WKUserContentController!, didReceiveScriptMessage message: WKScriptMessage!){
        println("got message: \(message.body)")
    }

}

Answer 1

函数定义已更改,删除感叹号:

func userContentController(userContentController: WKUserContentController, didReceiveScriptMessage message: WKScriptMessage)