Question

In my app, I have email sending code.

It’s quite plain-vanilla (pasted at end of question).

What happens is the following sequence:
– Click the “EMAIL” button of my app, that calls the sendEmail method
– Click the To field
– Type an email address
– Click the MFMailComposer Send button
– The email is sent (and arrives – I typically set my own email address)
– The application crashes… with this stack crawl:

2011-07-25 11:21:21.179 MyApp[2769:3d0b] -[__NSCFString searchQuery:returnedResults:]: unrecognized selector sent to instance 0x3c3410
2011-07-25 11:21:21.201 MyApp[2769:3d0b] uncaughtExceptionHandler
2011-07-25 11:21:21.202 MyApp[2769:3d0b] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFString searchQuery:returnedResults:]: unrecognized selector sent to instance 0x3c3410'

What I notice is the following:
1. As I type the the To address, the debugger output shows CPSqliteStatementSendResults: interrupted
2. If I add a setToRecipients (effectively “hard-coding” the To email address), the application doesn’t crash…

Any ideas? (code below)

- (void)sendEmail:(id)sender {
    MFMailComposeViewController *controller = [[MFMailComposeViewController alloc] init];
    controller.mailComposeDelegate = self;

    [controller setSubject:@"The Subject"];

    [self presentModalViewController:controller animated:YES];
    [controller release];
}

- (void)mailComposeController:(MFMailComposeViewController*)controller  
          didFinishWithResult:(MFMailComposeResult)result 
                        error:(NSError*)error;
{
    switch (result)
    {
        case MFMailComposeResultCancelled:
            break;
        case MFMailComposeResultSaved:
            break;
        case MFMailComposeResultSent:
            break;
        case MFMailComposeResultFailed:
            NSLog(@"Sending Failed");
            break;
        default:
            NSLog(@"Message not sent");
            break;
    }
    [self dismissModalViewControllerAnimated:YES];
}

Answer 1

Try not to release the MFMailComposeViewController immediately but in his delegate method didFinishWithResult (at the very end).