can change facebook app invitation text using graph api - ios

Question

Can we change facebook app invitation text using facebook Graph api ?
Generally this has format - "Inviter name sent you a request", can we replace this text to our own ?
(This get displayed as a notification on fb wall.)
I am using below code -
- (void)load:(BOOL)NeedToSendAppRequest AndMessage:(NSString*)message AndFriendID:(NSString*)friendID {
NSString *urlString = nil;
isNeedToSendAppRequest = NeedToSendAppRequest;
if (NeedToSendAppRequest) {
NSString *redirectUrlString = FACEBOOK_REDIRECT_URL;
NSString *authFormatString = #"https://m.facebook.com/dialog/apprequests?app_id=%#&target_url=fb%#&to=%#&message=%#&redirect_uri=%#";
urlString = [NSString stringWithFormat:authFormatString, _apiKey, _apiKey,friendID,message,redirectUrlString];
}else{
NSString *redirectUrlString = #"http://www.facebook.com/connect/login_success.html";
NSString *authFormatString = #"https://graph.facebook.com/oauth/authorize?client_id=%#&redirect_uri=%#&scope=%#&type=user_agent&display=touch";
urlString = [NSString stringWithFormat:authFormatString, _apiKey, redirectUrlString, _requestedPermissions];
}
NSURL *url = [NSURL URLWithString:urlString];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
[_webView loadRequest:request];
}

Answer 1

Check out the sample below - friendToInviteCSVString is a comma separated string of friend FB IDs that you want to invite. You can set a custom invite message in the message key of the parameter dictionary.
This is using the 3.x FB iOS SDK, by the way:
//Remove last comma from CSV string
friendToInviteCSVString = [friendToInviteCSVString stringByTrimmingCharactersInSet:[NSCharacterSet punctuationCharacterSet]];
NSMutableDictionary *parameters = [NSMutableDictionary dictionaryWithObjectsAndKeys:
NSLocalizedString(#"Check out this awesome app.", #"Check out this awesome app."), #"message",
friendToInviteCSVString, #"to", nil];
//Do FB invites
DDLogVerbose(#"Active fb session: %#", [FBSession activeSession]);
[FBWebDialogs presentDialogModallyWithSession:[FBSession activeSession] dialog:#"apprequests" parameters:parameters handler:^(FBWebDialogResult result, NSURL *resultURL, NSError *error)
{
DDLogVerbose(#"Facebook closed dialog with result: %d, URL: %#, error: %#", result, resultURL, error);
}];
EDIT:
Ok so I went digging around in my legacy code and here's a sample using FBDialog which is what's available in the SDK version you're using. First you need a Facebook object:
Facebook *facebook = [[Facebook alloc] initWithAppId:kFBAppID andDelegate:self];
//Check if token is valid
if (FBSession.activeSession.accessToken)
{
DLog(#"Init FB with activeSession, token: %# and expirationDate: %#", FBSession.activeSession.accessToken, FBSession.activeSession.expirationDate);
self.facebook.accessToken = FBSession.activeSession.accessToken;
self.facebook.expirationDate = FBSession.activeSession.expirationDate;
}
else
{
//No FB Token, do something here - ask user for permission, etc
}
NSMutableDictionary *parameters = [NSMutableDictionary dictionaryWithObjectsAndKeys:
NSLocalizedString(#"Check out this awesome app.", #"Facebook apprequest invite message"), #"message", friendsToInvite, #"to", nil];
[self.facebook dialog:#"apprequests" andParams:parameters andDelegate:self];