objective c - Facebook Graph Api call not working for iOS -

for ios app, using facebook sdk need fetch photos user's album need fetch them in single request info albums , containing photos @ same time, tried

/me/albums?fields=count,name,photos.limit(10){images} 

that api call working fine in graph api explorer not on ios platform. need images field of photos why using above api call

if run api runs fine

/me/albums?fields=count,name,photos.limit(10) 

only {images} part causing problem, error message of unsupported url, have acquired permissions user_photos

code :

fbsdkgraphrequest *request = [[fbsdkgraphrequest alloc] initwithgraphpath:@"/me/albums?fields=count,name,photos.limit(10){images}" parameters:nil httpmethod:@"get"];     fbsdkgraphrequestconnection *connection = [[fbsdkgraphrequestconnection alloc] init];     [connection addrequest:request completionhandler:^(fbsdkgraphrequestconnection *connection, id result, nserror *error) {          if(!error) {             nslog(@"result %@",result);         } else {             nslog(@"error description : %@",error.description);         }     }];      [connection start]; 

i making final url call adding/removing fields graph api explorer side pane, request call generating was

/me/albums?fields=count,name,photos.limit(10){images} 

not working on ios platform, if use syntax instead

/me/albums?fields=count,name,photos.limit(10).fields(images) 

to address fields of photos works fine, got inspiration answer posted here