ios - 在 swift 3.0 中实现 Facebook 和 Google 登录 API

Question

我挣扎了一夜半天才放弃，来这里寻求帮助。我已经在 stackoverflow 上阅读了几个线程，但任何解决方案似乎都有效，但即使应用程序在启动时崩溃

2016-10-26 16:03:58.793 MotivaMe[3997:404331] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<MotivaMe.ViewController 0x7ff1a0407700> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key loginButtonFB.'

已修复 请参阅底部的解决方案

编辑:编译器现在显示:“应用程序的实现:openURL:sourceApplication:注释:未找到。请将处理程序添加到您的应用程序委托(delegate)中。”特别是在身份验证之后，我陷入困境并且没有重定向到应用程序

这是我第一次尝试为 iOS 编写代码，所以我对目前仍在学习的 CocoaTouch 还没有那么有信心。感谢您的任何帮助(对修复的解释将非常感激，因为我不知道出了什么问题，谢谢大家)

这是 AppDelegate.swift

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool
{

    FBSDKApplicationDelegate.sharedInstance().application(application, didFinishLaunchingWithOptions: launchOptions)

    var configureError: NSError?
    GGLContext.sharedInstance().configureWithError(&configureError)
    assert(configureError == nil, "Error configuring Google services: \(configureError)")

    GIDSignIn.sharedInstance().delegate = self

    return true

}

func application(application: UIApplication, openURL url: NSURL, options: [UIApplicationOpenURLOptionsKey : Any] = [:]) -> Bool
{

    let googleDidHandle = GIDSignIn.sharedInstance().handle(
        url as URL!,
        sourceApplication: options[UIApplicationOpenURLOptionsKey.sourceApplication] as! String,
        annotation: options[UIApplicationOpenURLOptionsKey.annotation])

    let facebookDidHandle = FBSDKApplicationDelegate.sharedInstance().application(
        application,
        open: url as URL!,
        sourceApplication: options[UIApplicationOpenURLOptionsKey.sourceApplication] as! String,
        annotation: options [UIApplicationOpenURLOptionsKey.annotation])

    return googleDidHandle || facebookDidHandle
}

// The sign-in flow has finished and was successful if |error| is |nil|.
func sign(_ doLoginGoogle: GIDSignIn!, didSignInFor user: GIDGoogleUser!, withError error: Error!)
{
    if (error == nil)
    {
        // Perform any operations on signed in user here.
        let userId = user.userID                  // For client-side use only!
        let idToken = user.authentication.idToken // Safe to send to the server
        let fullName = user.profile.name
        let givenName = user.profile.givenName
        let familyName = user.profile.familyName
        let email = user.profile.email
        // ...
        print(userId,idToken,fullName,givenName,familyName,email)
    }
    else
    {
        print("\(error.localizedDescription)")
    }
}

这是 ViewController.swift

override func viewDidLoad() {
    super.viewDidLoad()


    GIDSignIn.sharedInstance().uiDelegate = self
    GIDSignIn.sharedInstance().signInSilently()
}

@IBOutlet weak var doLoginFacebook: FBSDKLoginButton!
@IBOutlet weak var doLoginGoogle: GIDSignInButton!

func loginButtonDidLogOut(_  doLoginFacebook: FBSDKLoginButton!)
{
    print("Did log out of facebook")
}

func loginButton(_ doLoginFacebook: FBSDKLoginButton!, didCompleteWith result: FBSDKLoginManagerLoginResult!, error: Error!)
{
    if error != nil
    {
        print(error)
        return
    }
    else
    {
        if(FBSDKAccessToken.current() != nil) //useless check but want to get confident with the api
        {
            //TODO implement switching pages on login 
            print("Sucessfully logged into facebook!")
        }
    }
}

Answer 1

我强烈怀疑您的 socket 连接之一卡在了您的 Stroyboard 或 Nib 中。这种情况可能会时不时地发生，因此您需要确保如果更新/删除 socket 连接，也会从接口(interface)构建器中删除。

要解决此问题，请转到界面编辑器，然后选择 View Controller 。然后转到右侧面板上的此处。

在那里您应该仍然可以看到已连接的loginButtonFB，旁边有一个小解释标记。删除此连接，应该可以解决您的问题。