Open Facebook iOS native app WITH back button to my app

Question

I am trying to open facebook app via AppLinks url , it opens user profile/page but does not show button "back to referer app" , I am providing "referer_app_link" data , I have generated JSON by this reference http://applinks.org/documentation/#applinknavigationprotocol

    NSDictionary *dict = @{
                       @"target_url" : @"fb://profile/USER_ID",
                       @"referer_app_link" : @{
                               @"target_url" : @"MY WEBSITE",
                               @"url" : @"CALLBACK URL",
                               @"app_name" : @"MY APP NAME",
                               @"app_store_id" : @"MY APP STORE ID"
                               }
                       };

NSData *data = [NSJSONSerialization dataWithJSONObject:dict options:0 error:nil];
NSString *jsonString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];

jsonString = [jsonString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

NSString *stringUrl = [NSString stringWithFormat:@"fb://applinks?al_applink_data=%@",jsonString];
NSLog(@"String url is %@",stringUrl);
NSURL *url = [NSURL URLWithString:stringUrl];

if([[UIApplication sharedApplication] canOpenURL:url]) {
    [[UIApplication sharedApplication] openURL:url];
} else {
    NSLog(@"Cant open %@",url);
}

any ideas ? is Facebook supposed to have "back button" at all ? my url scheme is set up correctly ...

Update: NSDictionary contains all valid values , I dont want to publish them at the moment , but url , name , store id ... etc all are valid

Update #2: Since iOS 9 , this is done by iOS System automatically.

Answer 1

applink is not wired into the FB friend profile page if you simply use the FB Custom URL to link into FB.APP or to safari it will not go back to your app automatically.

The alternative to this is to use the FB IOS SDK and Pick and display the remote user within your app as follows: (code from HelloFacebook sample app (comes with the SDK)

- (IBAction)pickFriendsClick:(UIButton *)sender {
   FBFriendPickerViewController *friendPickerController = [[FBFriendPickerViewController alloc] init];
     friendPickerController.title = @"Pick Friends";
     [friendPickerController loadData];

   // Use the modal wrapper method to display the picker.
   [friendPickerController presentModallyFromViewController:self animated:YES handler:
    ^(FBViewController *innerSender, BOOL donePressed) {
        if (!donePressed) {
            return;
       }

        NSString *message;

       if (friendPickerController.selection.count == 0) {
            message = @"<No Friends Selected>";
        } else {

            NSMutableString *text = [[NSMutableString alloc] init];

           // we pick up the users from the selection, and create a string that we use to update the text view
            // at the bottom of the display; note that self.selection is a property inherited from our base class
            for (id<FBGraphUser> user in friendPickerController.selection) {
                if ([text length]) {
                   [text appendString:@", "];
                }
               [text appendString:user.name];
           }
           message = text;
       }

        [[[UIAlertView alloc] initWithTitle:@"You Picked:"
                                 message:message
                                delegate:nil
                         cancelButtonTitle:@"OK"
                         otherButtonTitles:nil]
        show];
    }]; 

}

Note - the sample currently just picked the name property from the FBGraphUser Class instance ....

user will have other properties birthday, sex etc, just lookup header file within the SDK or look up FB documentation.