ios - Facebook login returning null for name result -


i trying use new facebook 4.0 sdks, quite confused how name once permissions. nslog returns null value reason?

fbsdkloginmanager *login = [[fbsdkloginmanager alloc] init];     [login loginwithreadpermissions:@[@"public_profile"] handler:^(fbsdkloginmanagerloginresult *result, nserror *error) {         if (error) {             // process error                     } else if (result.iscancelled) {             // handle cancellations          } else {         //success              _nam = [fbsdkprofile currentprofile].name;             nslog(@"name %@", _nam);       }}];

this ended solving it.

fbsdkloginmanager *login = [[fbsdkloginmanager alloc] init];     [login loginwithreadpermissions:@[@"public_profile"] handler:^(fbsdkloginmanagerloginresult *result, nserror *error) {         if (error) {             // process error                     } else if (result.iscancelled) {             // handle cancellations          } else {    [[[fbsdkgraphrequest alloc] initwithgraphpath:@"me" parameters:nil]          startwithcompletionhandler:^(fbsdkgraphrequestconnection *connection, id result, nserror *error) {              if (error) {               }              else {                  nsstring *userid = [[fbsdkaccesstoken currentaccesstoken] userid];                  nsstring *username = [result valueforkey:@"name"]; }}]; }}];

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