iOS：通过应用程序登录Facebook

Question

I'm trying to login to Facebook through my app using FBSDKLoginManager . I'm asking for some permissions while logging. But every time i get the following error:

[11624:2243947] data----(null) [11624:2243947] Access Facebook page error:Error Domain=com.facebook.sdk.core Code=8 "The operation couldn't be completed. (com.facebook.sdk.core error 8.)" UserInfo=0x15eb2e80 {com.facebook.sdk:FBSDKErrorDeveloperMessageKey=Sorry, this feature isn't available right now: An error occurred while processing this request. Please try again later., com.facebook.sdk:FBSDKGraphRequestErrorGraphErrorCode=2, com.facebook.sdk:FBSDKGraphRequestErrorCategoryKey=0}

Could anyone please help? This is the code that I've written:

FBSDKLoginManager *login = [[FBSDKLoginManager alloc] init];

[login logInWithPublishPermissions:@[@"publish_actions"] handler:^(FBSDKLoginManagerLoginResult *result, NSError *error) {
    NSLog(@"data----%@",result.grantedPermissions);
    if (error) {
        // Process error
        NSLog(@"Access Facebook page error:%@", error);
    } else if (result.isCancelled) {
        // Handle cancellations
    } else {
        // If you ask for multiple permissions at once, you
        // should check if specific permissions missing
        if ([result.grantedPermissions containsObject:@"publish_actions"]) {
            // Do work
            NSLog(@" publish actions permission granted");

            [login logInWithReadPermissions:@[@"user_likes",@"user_birthday"] handler:^(FBSDKLoginManagerLoginResult *result, NSError *error) {
                if (error) {
                    // Process error
                } else if (result.isCancelled) {
                    // Handle cancellations
                } else {
                    // If you ask for multiple permissions at once, you
                    // should check if specific permissions missing
                    if ([result.grantedPermissions containsObject:@"user_birthday"]) {
                        // Do work

                        NSLog(@"Permission  2: %@",result.grantedPermissions);
                    }
                }
            }];

        }
    }
}];

Answer 1

Login with Facebook SDK 4.x

Add following code to facebook login button click :

FBSDKLoginManager *login = [[FBSDKLoginManager alloc] init];
[login logInWithReadPermissions:@[@"email"] handler:^(FBSDKLoginManagerLoginResult *result, NSError *error)
 {
     if (error)
     {
         // Error
     }
     else if (result.isCancelled)
     {
         // Cancelled
     }
     else
     {
         if ([result.grantedPermissions containsObject:@"email"])
         {
             [self getFBResult];
         }
     }
}];

Get Facebook Result Method :

-(void)getFBResult
{
    if ([FBSDKAccessToken currentAccessToken])
    {
        [[[FBSDKGraphRequest alloc] initWithGraphPath:@"me" parameters:@{@"fields": @"id, name, first_name, last_name, picture.type(large), email"}]
         startWithCompletionHandler:^(FBSDKGraphRequestConnection *connection, id result, NSError *error) {
             if (!error)
             {
                 NSLog(@"fb user info : %@",result);
             }
             else
             {
                 NSLog(@"error : %@",error);
             }
         }];   
    }
}

You can change the fields of permissions as you want.