How to invite friends to my application via facebook iOS SDK and Graph API

Question

I\'m writing an iPhone application.

I want to give the user the option to invite friends to start using my application via Facebook.

More specifically I want to

Answer 1

[FBWebDialogs
 presentRequestsDialogModallyWithSession:nil
 message:@"YOUR_MESSAGE_HERE"
 title:nil
 parameters:nil
 handler:^(FBWebDialogResult result, NSURL *resultURL, NSError *error) {
     if (error) {
         // Error launching the dialog or sending the request.
         NSLog(@"Error sending request.");
     } else {
         if (result == FBWebDialogResultDialogNotCompleted) {
             // User clicked the "x" icon
             NSLog(@"User canceled request.");
         } else {
             // Handle the send request callback
             NSDictionary *urlParams = [self parseURLParams:[resultURL query]];
             if (![urlParams valueForKey:@"request"]) {
                 // User clicked the Cancel button
                 NSLog(@"User canceled request.");
             } else {
                 // User clicked the Send button
                 NSString *requestID = [urlParams valueForKey:@"request"];
                 NSLog(@"Request ID: %@", requestID);
             }
         }
     }
}];