Отправка сообщения электронной почты из приложения с помощью MFMailComposeViewController в MessageUI на iPhone

Я разработчик программного обеспечения, и я создаю приложение для сообщения электронной почты, и у меня есть следующий код:

// Header file  

// importing the MessageUI framework  
#import <MessageUI/MessageUI.h>  

// adding the delegate functionality to the class (<MFMailComposeViewControllerDelegate>)  
@interface TutorialProjectViewController : UIViewController <MFMailComposeViewControllerDelegate> {  

}  

- (IBAction)pressTheMailButtonDudeFunction:(id)sender

// Implementation file  

- (IBAction)pressTheMailButtonDudeFunction:(id)sender {  

    // allocatind new message composer window  
    MFMailComposeViewController *mc = [[MFMailComposeViewController alloc] init];  

    // setting a delegate method to "self"  
    mc.mailComposeDelegate = self;  

    // pre-populating the message subject  
    [mc setSubject:@"Send me a message"];  

    // adding content of the message as a plain text  
    [mc setMessageBody:@"Send me a message is you like this tutorial :)" isHTML:NO];  

    // adding content of the message as an HTML  
    [mc setMessageBody:@"<p>Send me a message is you like this tutorial :)<p>" isHTML:YES];  

    // adding recipients  
    [mc setToRecipients:[NSArray arrayWithObjects:@"Fuerte <info@fuerte.cz>", @"info@xprogress.com", nil]];  

    // adding recipients for a send copy to (arrayWithObject or arrayWithObjects)  
    [mc setCcRecipients:[NSArray arrayWithObject:@"test@example.com"]];  

    // adding hidden recipients  
    [mc setBccRecipients:[NSArray arrayWithObject:@"test@example.com"]];  

    // adding image attachment  
    // getting path for the image we have in the tutorial project  
    NSString *path = [[NSBundle mainBundle] pathForResource:@"Extra_Xcode_100x100" ofType:@"png"];  

    // loading content of the image into NSData  
    NSData *imageData = [NSData dataWithContentsOfFile:path];  

    // adding the attachment to he message  
    [mc addAttachmentData:imageData mimeType:@"image/png" fileName:@"Collection"];  

    // setting different than the default transition for the modal view controller  
    [mc setModalTransitionStyle:UIModalTransitionStyleCrossDissolve];  

    /* 
     Modal view controllers transitions: 

     UIModalTransitionStyleCoverVertical => pops up from the bottom, default transition 
     UIModalTransitionStyleCrossDissolve => fade on the screen 
     UIModalTransitionStyleFlipHorizontal => page flip 
     */  

    // displaying our modal view controller on the screen (of course animated has to be set on YES if you want to see any transition)  
    [self presentModalViewController:mc animated:YES];  

    // releasing the controller  
    [mc release];  
}  

// delegate function callback  
- (void)mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error {  
    // switchng the result  
    switch (result) {  
        case MFMailComposeResultCancelled:  
            NSLog(@"Mail send canceled.");  
            /* 
             Execute your code for canceled event here ... 
             */  
            break;  
        case MFMailComposeResultSaved:  
            NSLog(@"Mail saved.");  
            /* 
             Execute your code for email saved event here ... 
             */  
            break;  
        case MFMailComposeResultSent:  
            NSLog(@"Mail sent.");  
            /* 
             Execute your code for email sent event here ... 
             */  
            break;  
        case MFMailComposeResultFailed:  
            NSLog(@"Mail send error: %@.", [error localizedDescription]);  
            /* 
             Execute your code for email send failed event here ... 
             */  
            break;  
        default:  
            break;  
    }  
    // hide the modal view controller  
    [self dismissModalViewControllerAnimated:YES];  
}  

И я не получаю правильный ответ ... Это правильный код?