Share image on twitter in IOS

HI I want to share Image on twitter from my APP. I have tweet text succesfully by following code.How can I tweet image with text.

-(IBAction)updateTwitter{ if(!_engine){ _engine = [[SA_OAuthTwitterEngine alloc] initOAuthWithDelegate:self]; _engine.consumerKey = kOAuthConsumerKey; _engine.consumerSecret = kOAuthConsumerSecret; } if(![_engine isAuthorized]){ UIViewController *controller = [SA_OAuthTwitterController controllerToEnterCredentialsWithTwitterEngine:_engine delegate:self]; if (controller){ [self presentModalViewController: controller animated: YES]; } } if([_engine isAuthorized]){ [_engine sendUpdate:@"This is my first test"]; } }