FBSDKLoginManager not open login Dialog in native ios apps

Question

I am new to iPhone development ,i want to do a facebook login from my native iOS simple application using latest facebook sdk 4. something ,i just want to open a facebook login dialog from Custom

UIButton

click,in my apps and for that i do below code in my button click method..

- (IBAction)didTapLoginFaceBook:(id)sender {



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

    [login logInWithReadPermissions:@[@"email"] handler:^(FBSDKLoginManagerLoginResult *result, NSError *error) {

        if (error) {

            // Process error



        NSLog(@"Unexpected login error: %@", error);

        NSString *alertMessage = error.userInfo[FBSDKErrorLocalizedDescriptionKey] ?: @"There was a problem logging in. Please try again later.";

        NSString *alertTitle = error.userInfo[FBSDKErrorLocalizedTitleKey] ?: @"Oops";

        [[[UIAlertView alloc] initWithTitle:alertTitle

                                        message:alertMessage

                                       delegate:nil

                              cancelButtonTitle:@"OK"

                              otherButtonTitles:nil] show];





        } 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:@"email"]) {

                // Do work

            }

        }

    }];





}

This code is work something different,but i want to open a login dialog form Custom

UIButton

Click in the native iOS apps.

So,please suggest the right way with some code,thanks in advance

Answer 1

Facebook login with custom button in 4.x SDK

- (IBAction)btnFacebookPressed:(id)sender {
    FBSDKLoginManager *login = [[FBSDKLoginManager alloc] init];
    login.loginBehavior = FBSDKLoginBehaviorBrowser;
    [login logInWithReadPermissions:@[@"email"] handler:^(FBSDKLoginManagerLoginResult *result, NSError *error)
     {
         if (error)
         {
             // Process error
         }
         else if (result.isCancelled)
         {
             // Handle cancellations
         }
         else
         {
             if ([result.grantedPermissions containsObject:@"email"])
             {
                 NSLog(@"result is:%@",result);
                 [self fetchUserInfo];
                 [login logOut];
             }
         }
     }];
}
-(void)fetchUserInfo
{
    if ([FBSDKAccessToken currentAccessToken])
    {
        NSLog(@"Token is available : %@",[[FBSDKAccessToken currentAccessToken]tokenString]);

        [[[FBSDKGraphRequest alloc] initWithGraphPath:@"me" parameters:@{@"fields": @"id, name, link, first_name, last_name, picture.type(large), email, birthday, bio ,location , friends ,hometown , friendlists"}]
         startWithCompletionHandler:^(FBSDKGraphRequestConnection *connection, id result, NSError *error) {
             if (!error)
             {
                 NSLog(@"resultis:%@",result);

             }
             else
             {
                 NSLog(@"Error %@",error);
             }
         }];
    }
}

FBSDKLoginManager not open login Dialog in native ios apps

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