Question

With the SDK / Cocoa Touch, is it feasible to make an app that will SMS automatically?
My objective isn’t to SPAM anyone.

Answer 1

Three is a way to pre-build an SMS using MFMessageComposeViewController. The only issue with this method is that a modal view will be shown to the user to accept the SMS (like the window that sends an e-mail by the default way). There is no way to send a SMS in “silent mode” without jailbreak.

{    
...
[self sendSMS:@"_SMS_TEXT_" recipientList:[NSArray arrayWithObjects:@"PHONE_NUMBER", nil]];
...
}

- (void)sendSMS:(NSString *)bodyOfMessage recipientList:(NSArray *)recipients
{
    MFMessageComposeViewController *controller = [[[MFMessageComposeViewController alloc] init] autorelease];
    if([MFMessageComposeViewController canSendText])
    {
        controller.body = bodyOfMessage;    
        controller.recipients = recipients;
        controller.messageComposeDelegate = self;
        [self presentModalViewController:controller animated:YES];
    }    
}

- (void)messageComposeViewController:(MFMessageComposeViewController *)controller didFinishWithResult:(MessageComposeResult)result
{
    [self dismissModalViewControllerAnimated:YES];

    if (result == MessageComposeResultCancelled)
        NSLog(@"Message cancelled")
    else if (result == MessageComposeResultSent)
        NSLog(@"Message sent")  
    else 
        NSLog(@"Message failed")  
}