Question

I am trying to send an SMS on an iPhone using MFMessageComposeVieController and I want to add a listener that recognizes when the SMS is sent (in other words, when the user presses “Send”). What is the syntax for this?

For example, I know that with a textField, an example of a listener would be:
[textField addTarget:self action:@selector(methodName) forControlEvents:UIControlEventEditingDidEndOnExit];

Answer 1

You want to add a delegate to your MFMessageComposeViewController. In the delegate’s messageComposeViewController:didFinishWithResult: method, you can check the result parameter to see whether the user canceled or sent the SMS.

- (void)messageComposeViewController:(MFMessageComposeViewController *)controller 
                 didFinishWithResult:(MessageComposeResult)result {
        switch(result) {
        case MessageComposeResultCancelled:
            // user canceled sms
            break;
        case MessageComposeResultSent:
            // user sent sms
            break;
        case MessageComposeResultFailed:
            // sms send failed
            break;
        default:
            break;
}