我正在尝试使用Facebook登录，它成功登录，但不能返回到应用程序 [英] I am trying login with Facebook, it succeeds at login but do not return to app

问题描述

我无法再回到应用程序（如下图所示），无法检索任何用户的数据。

我已经搜索，但没有找到任何合适的答案我的查询。

日志的图片： p>

结束如下图所示的图片，不要回到应用程序，没有用户的数据：

解决方案

 步骤1。下载最新的Facebook SDK（包括重大变更）。 
 
 Step-2。将FBSDKCoreKit.framework和FBSDKLoginKit.framework添加到
您的项目。 
 
步骤3。现在去项目>构建阶段>添加
 SafariServices.framework 
 
步骤4。 info.plist有三个变化，我们需要验证。 
 
 4.1确保您的info.plist文件中有以下文件
 
 
 
< key> CFBundleURLTypes< / key> 
< array> 
< dict> 
< key> CFBundleURLSchemes< / key> 
< array> 
< string><你的fb id这里例如。 fbxxxxxx>< /串GT; 
< / array> 
< / dict> 
< / array> 
< key> FacebookAppID< / key> 
< string><你的FacebookAppID>< / string> 
< key> FacebookDisplayName< / key> 
< string>< Your_App_Name_Here>< / string> 
 
 4.2现在添加以下白名单Facebook服务器，这是iOS 9必须的
 
< key> NSAppTransportSecurity< / key> 
< dict> 
< key> NSExceptionDomains< / key> 
< dict> 
< key> facebook.com< / key> 
< dict> 
< key> NSIncludesSubdomains< / key> 
< true /> 
< key> NSExceptionRequiresForwardSecrecy< / key> 
< false /> 
< / dict> 
< key> fbcdn.net< / key> 
< dict> 
< key> NSIncludesSubdomains< / key> 
< true /> 
< key> NSExceptionRequiresForwardSecrecy< / key> 
< false /> 
< / dict> 
< key> akamaihd.net< / key> 
< dict> 
< key> NSIncludesSubdomains< / key> 
< true /> 
< key> NSExceptionRequiresForwardSecrecy< / key> 
< false /> 
< / dict> 
< / dict> 
< / dict> 
 
 4.3添加URL方案
< key> LSApplicationQueriesSchemes< / key> 
< array> 
< string> fbapi< / string> 
< string> fb-messenger-api< / string> 
< string> fbauth2< / string> 
< string> fbshareextension< / string> 
< / array> 
 Step-5。现在打开AppDelegate.m文件
 
 5.1添加以下import语句
 
 #import< FBSDKLoginKit / FBSDKLoginKit.h> 
 #import< FBSDKCoreKit / FBSDKCoreKit.h> 
 
 5.2更新以下方法
 
 
 
  - （BOOL）应用程序：（UIApplication *）应用程序
 openURL：（NSURL *） url 
 sourceApplication：（NSString *）sourceApplication 
注释：（id）注释{
 return [[FBSDKApplicationDelegate sharedInstance]应用程序：应用程序
 openURL：url 
 sourceApplication：sourceApplication 
注释：注释]; 
} 
 
  - （void）applicationDidBecomeActive :( UIApplication *）应用程序{
 [FBSDKAppEvents activateApp]; 
} 
 
  - （BOOL）应用程序：（UIApplication *）应用程序didFinishLaunchingWithOptions :( NSDictionary *）launchOptions {
 return [[FBSDKApplicationDelegate sharedInstance]应用程序：应用程序
 didFinishLaunchingWithOptions ：launchOptions]; 
} 
 
第六步。现在我们需要修改我们的登录控制器，我们在哪里登录任务
 
 6.1在Login ViewController.m中添加这些导入
 
 #import< FBSDKCoreKit / FBSDKCoreKit.h> 
 #import< FBSDKLoginKit / FBSDKLoginKit.h> 
 
 6.2添加Facebook登录按钮
 
 FBSDKLoginButton * loginButton = [[FBSDKLoginButton alloc] init]; 
 loginButton.center = self.view.center; 
 [self.view addSubview：loginButton]; 
 
 6.3手柄登录按钮点击
 
 
 
  - （IBAction）facebookLogin：（id）sender 
 {
 FBSDKLoginManager * login = [[FBSDKLoginManager alloc] init]; 
 
 if（[FBSDKAccessToken currentAccessToken]）
 {
 NSLog（@令牌可用：％@，[[FBSDKAccessToken currentAccessToken] tokenString]）; 
 [self fetchUserInfo]; 
} 
 
 {
 [login logInWithReadPermissions：@ [@email] fromViewController：self handler：^（FBSDKLoginManagerLoginResult * result，NSError * error）
 { 
如果（错误）
 {
 NSLog（@登录过程错误）; 
} 
 else if（result.isCancelled）
 {
 NSLog（@用户取消登录）; 
} 
 else 
 {
 NSLog（@登录成功）; 
 
 if（[result.grantedPermissions containsObject：@email]）
 {
 NSLog（@result is：％@，result）; 
 [self fetchUserInfo]; 
} 
 else 
 {
 [SVProgressHUD showErrorWithStatus：@Facebook电子邮件权限错误]; 
 
} 
} 
}]; 
} 
} 
 6.4获取用户信息（名称，电子邮件等）
 
  - （void）fetchUserInfo 
 {
 if（[ FBSDKAccessToken currentAccessToken]）
 {
 NSLog（@令牌可用：％@，[[FBSDKAccessToken currentAccessToken] tokenString]）; 
 
 [[FBSDKGraphRequest alloc] initWithGraphPath：@me参数：@ {@fields：@id，name，email}] 
 startWithCompletionHandler：^（FBSDKGraphRequestConnection * ，id result，NSError * error）{
 if（！error）
 {
 NSLog（@results：％@，result）; 
 
 NSString * email = [result objectForKey：@email]; 
 NSString * userId = [result objectForKey：@id]; 
 
 if（email.length> 0）
 {
 //开始你的应用程序Todo 
} 
 else 
 {
 NSLog（@Facebook电子邮件未验证）; 
} 
} 
 else 
 {
 NSLog（@Error％@，error）; 
} 
}]; 
} 
} 
  

I cannot get back to app after this (shown in the pictures below) and cannot retrieve any user's data.

I have searched but didn't got any suitable answer to my query.

Log's picture:

Ends up like the picture bellow shown, do not come back to app and there is no data of user:

解决方案

Step-1. Download latest Facebook SDK (it includes major changes).

Step-2. Add FBSDKCoreKit.framework and FBSDKLoginKit.framework to 
        your project.

Step-3. Now go to Project > Build Phases > add 
        SafariServices.framework

Step-4. There are three changes in info.plist we need to verify.

4.1 Make sure you have below in your info.plist file



 <key>CFBundleURLTypes</key>
<array>
  <dict>
  <key>CFBundleURLSchemes</key>
  <array>
    <string><your fb id here eg. fbxxxxxx></string>
  </array>
  </dict>
</array>
  <key>FacebookAppID</key>
  <string><your FacebookAppID></string>
  <key>FacebookDisplayName</key>
<string><Your_App_Name_Here></string>

4.2 Now add below for White-list Facebook Servers, this is must for     iOS 9

    <key>NSAppTransportSecurity</key>
<dict>
  <key>NSExceptionDomains</key>
  <dict>
    <key>facebook.com</key>
    <dict>
      <key>NSIncludesSubdomains</key>
      <true/>
      <key>NSExceptionRequiresForwardSecrecy</key>
      <false/>
    </dict>
    <key>fbcdn.net</key>
    <dict>
      <key>NSIncludesSubdomains</key>
      <true/>
      <key>NSExceptionRequiresForwardSecrecy</key>
      <false/>
    </dict>
    <key>akamaihd.net</key>
    <dict>
      <key>NSIncludesSubdomains</key>
      <true/>
      <key>NSExceptionRequiresForwardSecrecy</key>
      <false/>
    </dict>
  </dict>
</dict>

4.3 Add URL schemes
    <key>LSApplicationQueriesSchemes</key>
  <array>
      <string>fbapi</string>
      <string>fb-messenger-api</string>
      <string>fbauth2</string>
      <string>fbshareextension</string>
  </array>
Step-5. Now open AppDelegate.m file

5.1 Add below import statements

#import <FBSDKLoginKit/FBSDKLoginKit.h>
#import <FBSDKCoreKit/FBSDKCoreKit.h>

5.2 update following following methods



 - (BOOL)application:(UIApplication *)application
            openURL:(NSURL *)url
  sourceApplication:(NSString *)sourceApplication
         annotation:(id)annotation {
  return [[FBSDKApplicationDelegate sharedInstance] application:application
                                                         openURL:url
                                               sourceApplication:sourceApplication
                                                      annotation:annotation];
}

- (void)applicationDidBecomeActive:(UIApplication *)application {
  [FBSDKAppEvents activateApp];
}

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
  return [[FBSDKApplicationDelegate sharedInstance] application:application
                                    didFinishLaunchingWithOptions:launchOptions];
}

Step-6. Now we need to modify our Login Controller, where we do Login task

6.1 Add these imports in Login ViewController.m

#import <FBSDKCoreKit/FBSDKCoreKit.h>
#import <FBSDKLoginKit/FBSDKLoginKit.h>

6.2 Add Facebook Login Button

    FBSDKLoginButton *loginButton = [[FBSDKLoginButton alloc] init];
loginButton.center = self.view.center;
[self.view addSubview:loginButton];

6.3 Handle Login button click



 -(IBAction)facebookLogin:(id)sender
{
    FBSDKLoginManager *login = [[FBSDKLoginManager alloc] init];

    if ([FBSDKAccessToken currentAccessToken])
    {
        NSLog(@"Token is available : %@",[[FBSDKAccessToken currentAccessToken]tokenString]);
        [self fetchUserInfo];
    }
    else
    {
        [login logInWithReadPermissions:@[@"email"] fromViewController:self handler:^(FBSDKLoginManagerLoginResult *result, NSError *error)
         {
             if (error)
             {
                 NSLog(@"Login process error");
             }
             else if (result.isCancelled)
             {
                 NSLog(@"User cancelled login");
             }
             else
             {
                 NSLog(@"Login Success");

                 if ([result.grantedPermissions containsObject:@"email"])
                 {
                     NSLog(@"result is:%@",result);
                     [self fetchUserInfo];
                 }
                 else
                 {
                     [SVProgressHUD showErrorWithStatus:@"Facebook email permission error"];

                 }
             }
         }];
    }
}
6.4 Get user info (name, email etc.)

    -(void)fetchUserInfo
{
    if ([FBSDKAccessToken currentAccessToken])
    {
        NSLog(@"Token is available : %@",[[FBSDKAccessToken currentAccessToken]tokenString]);

        [[[FBSDKGraphRequest alloc] initWithGraphPath:@"me" parameters:@{@"fields": @"id, name, email"}]
         startWithCompletionHandler:^(FBSDKGraphRequestConnection *connection, id result, NSError *error) {
             if (!error)
             {
                 NSLog(@"results:%@",result);

                 NSString *email = [result objectForKey:@"email"];
                 NSString *userId = [result objectForKey:@"id"];

                 if (email.length >0 )
                 {
                     //Start you app Todo
                 }
                 else
                 {
                    NSLog(@"Facebook email is not verified");
                 }
             }
             else
             {
                 NSLog(@"Error %@",error);
            }
         }];
    }
}

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