如何从 facebook sdk 4 快速获取用户电子邮件

Posted 2023-03-16

【中文标题】如何从 facebook sdk 4 快速获取用户电子邮件

【英文标题】：How to get user email from facebook sdk 4 whith swift

【发布时间】：2015-09-11 01:30:15

【问题描述】：

我一直在尝试使用此代码来获取我的 ios 应用程序所需的用户信息，当我按下 func loginButton 时，我应该登录并获取用户名和电子邮件，

    func loginButton(loginButton: FBSDKLoginButton!, didCompleteWithResult result: FBSDKLoginManagerLoginResult!, error: NSError!) 

    if( error != nil)
    
        println(error.localizedDescription)
        return
    

    if let userToken = result.token
        //Get user acces token 
        let token:FBSDKAccessToken=result.token

        println("Token = \(FBSDKAccessToken.currentAccessToken().tokenString)")

        println("User ID = \(FBSDKAccessToken.currentAccessToken().userID)")


        let protectedPage = self.storyboard?.instantiateViewControllerWithIdentifier("ProtectedPageViewController") as! ProtectedPageViewController
        let protectedPageNav = UINavigationController(rootViewController: protectedPage)

        let appDelegate = UIApplication.sharedApplication().delegate as! AppDelegate

        appDelegate.window?.rootViewController = protectedPageNav

    

    //Show user information
    let graphRequest : FBSDKGraphRequest = FBSDKGraphRequest(graphpath: "me", parameters: nil)

    graphRequest.startWithCompletionHandler( (connection, result, error) -> Void in

        if ((error) != nil)
        
            // Process error
            println("Error: \(error)")
        
        else
        
            println("fetched user: \(result)")
            let userEmail : NSString = result.valueForKey("email") as! NSString
            println("User Email is: \(userEmail)")
            let userName : NSString = result.valueForKey("name") as! NSString
            println("User Name is: \(userName)")

        
    )

有一条评论显示用户信息，它应该打印电子邮件和用户名，它打印名称但不打印电子邮件，我收到以下错误： FBSDKLog：从 Graph API v2.4 开始，对 /me 的 GET 请求应该包含一个明确的“字段”参数，有人知道我在做什么错吗？谢谢

【参考方案1】：

我认为您需要添加参数。

尝试将其更改为：

let graphRequest : FBSDKGraphRequest = FBSDKGraphRequest(graphPath: "me", parameters: ["fields":"name, email"])

【参考方案2】：

我也有同样的问题，我找到了这个目标 c 的解决方案

 NSMutableDictionary*params = [NSMutableDictionary dictionary];
[params setValue:@"fields" forKeyPath:@"fields"];
[params setValue:@"name" forKeyPath:@"name"];
[params setValue:@"email" forKeyPath:@"email"];

并将参数的值设置为 params 这将起作用

【参考方案3】：

添加LoginButtonDelegate委托并添加协议，然后添加以下代码并测试

 func loginButton(_ loginButton: FBLoginButton, didCompleteWith result: LoginManagerLoginResult?, error: Error?) 
        print(loginButton)
        let loginManager = LoginManager()
        print(result?.token?.tokenString) //YOUR FB TOKEN
        let req = GraphRequest(graphPath: "me", parameters: ["fields":"email,name"], tokenString: result?.token?.tokenString, version: nil, httpMethod: HTTPMethod(rawValue: "GET"))
        req.start  (connection, resultData, err) in
            if err == nil 
                print(resultData)
            else 
                print(err)
            
        

           loginManager.logIn(permissions: ["email"], from: self)  (result, error) in
             if error != nil 
              // self.showPopup(isSuccess: false)
               return
             
             guard let token = AccessToken.current else 
               print("Failed to get access token")
           //    self.showPopup(isSuccess: false)
               return
             

             FirebaseAuthManager().login(credential: FacebookAuthProvider.credential(withAccessToken: token.tokenString)) [weak self] (success) in
          //     self?.showPopup(isSuccess: true)
             
           
    

    func loginButtonDidLogOut(_ loginButton: FBLoginButton) 
         print(loginButton)