Google OAuth2.0 回调如何在 iOS 应用中工作？

Question

我想知道 iOS 应用在使用 GoogleSignIn 包时在获得 Google 授权后从 Safari 回调后如何获取授权。

我关注了instructions on google's developer site，它告诉我将以下代码添加到 AppDelegate，我相信它负责处理。

func application(application: UIApplication,
   openURL url: NSURL, options: [String: AnyObject]) -> Bool {
      return GIDSignIn.sharedInstance().handleURL(url,
         sourceApplication: options[UIApplicationOpenURLOptionsSourceApplicationKey] as? String,
         annotation: options[UIApplicationOpenURLOptionsAnnotationKey])
}

但是当我在这个方法上放置一个断点，所以我可以看到 url，它从来没有被调用过。我什至尝试删除此方法，它仍然有效！

谁能给我解释一下这是什么魔法？

Answer 1

我已通过以下方式在我的一个应用程序中实现了 Google 登录...

必需的吊舱

pod 'GoogleSignIn'

用户点击 Google 登录按钮

我已经创建了自定义按钮。

@IBAction func btnGoogleSignInTapped(_ sender: UIButton) {

    GIDSignIn.sharedInstance().clientID = kGoogleClientID
    GIDSignIn.sharedInstance().delegate = self
    GIDSignIn.sharedInstance().uiDelegate = self
    GIDSignIn.sharedInstance().signIn()
}

GIDSignInDelegate 实施

extension MyVC: GIDSignInDelegate {

func sign(_ signIn: 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

        debugPrint("user id = \(String(describing: userId))")
        debugPrint("idToken = \(String(describing: idToken))")
        debugPrint("fullName = \(String(describing: fullName))")
        debugPrint("givenName = \(String(describing: givenName))")
        debugPrint("familyName = \(String(describing: familyName))")
        debugPrint("email = \(String(describing: email))")

        //sign in successfull......
    } else {
        debugPrint("Google sign in error :\(error.localizedDescription)")
    }
}

//-----------------------------------------------------

func sign(_ signIn: GIDSignIn!, didDisconnectWith user: GIDGoogleUser!, withError error: Error!) {

    debugPrint("User did disconnecte with error !!")
}

//-----------------------------------------------------
}

您需要在项目的 info.plist 文件下设置 URL 类型...