Firebase+；iOS：处理多个身份验证提供程序

我正在创建一个应用程序来学习如何使用Firebase和Swift 3。到目前为止，我已经用facebook和google实现了身份验证。棘手的部分是AppDelegate中的func：

func application(_ application: UIApplication, open url: URL, sourceApplication: String?, annotation: Any) -> Bool {

    // Works with google
    return GIDSignIn.sharedInstance().handle(url,sourceApplication: sourceApplication, annotation: annotation)

    // Works with facebook
    //return FBSDKApplicationDelegate.sharedInstance().application(application, open: url, sourceApplication: sourceApplication, annotation: annotation)
}

问题是：如果我在用户登录facebook时评论facebook行，它将不会返回应用程序。谷歌也是如此

我遵循以下指南：

我的问题是，我应该如何使用此函数才能与许多身份验证提供程序正常工作？如果没有办法做到这一点，那么正确的实施方法是什么

---

谢谢你的帮助，我找到了答案。func现在是这样的，适用于谷歌和Facebook：

func application(_ application: UIApplication, open url: URL, sourceApplication: String?, annotation: Any) -> Bool {

    if GIDSignIn.sharedInstance().handle(url,
                                         sourceApplication: sourceApplication,
                                         annotation: annotation) {
        return true
    }
    return FBSDKApplicationDelegate.sharedInstance().application(application,
                                                                 open: url,
                                                                 sourceApplication: sourceApplication,
                                                                 annotation: annotation)
}

像这样：

func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey : Any] = [:]) -> Bool {

    let googleSignIn = GIDSignIn.sharedInstance().handle(url, sourceApplication: options[UIApplicationOpenURLOptionsKey.sourceApplication] as? String, annotation: options[UIApplicationOpenURLOptionsKey.annotation])

    let facebookSignIn = FBSDKApplicationDelegate.sharedInstance().application(app, open: url, sourceApplication: options[UIApplicationOpenURLOptionsKey.sourceApplication] as? String, annotation: options[UIApplicationOpenURLOptionsKey.annotation])

    return googleSignIn || facebookSignIn
}