Application crashing on email in device

Question

I have added a function of "Email" in my iPhone application and it is crashing on iPhone but working on simulator. Please guide me why it is crashing on Device

this is the code

-(IBAction)sendMail{
    MFMailComposeViewController *controller = [[MFMailComposeViewController alloc] init];
    controller.mailComposeDelegate = self;
    [controller setSubject:@"Contact"];

    [controller setToRecipients:[NSArray arrayWithObject:@"[email protected]"]];
    [controller setMessageBody:@"" isHTML:NO];
    [self presentModalViewController:controller animated:YES];
    [controller release];
}

- (void)mailComposeController:(MFMailComposeViewController*)controller  
          didFinishWithResult:(MFMailComposeResult)result 
                        error:(NSError*)error;
{
    if (result == MFMailComposeResultSent) {
        NSLog(@"It's away!");
    }
    [self dismissModalViewControllerAnimated:YES];
}

Answer 1

use this code its work fine.

-(IBAction)Btn_EmailPressed:(id)sender{
    if (![MFMailComposeViewController canSendMail]) {
        UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"Alert" message:@"Email cannot be configure." delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
        [alert show];
        [alert release];
        return;
    }else {
        picker = [[MFMailComposeViewController alloc] init];
        picker.mailComposeDelegate=self;
        [picker setToRecipients:nil];
        [picker setSubject:@"Email"];
        [picker setMessageBody:nil isHTML:NO];
        NSArray *toRecipients = [[NSArray alloc] initWithObjects:lblSite.text,nil];
        [picker setToRecipients:toRecipients];
        [self presentModalViewController:picker animated:YES];
    }
}


- (void)mailComposeController:(MFMailComposeViewController*)mailController didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error {
    NSString *msg1;
    switch (result)
    {
        case MFMailComposeResultCancelled:
            msg1 =@"Sending Mail is cancelled";
            break;
        case MFMailComposeResultSaved:
            msg1=@"Sending Mail is Saved";
            break;
        case MFMailComposeResultSent:
            msg1 =@"Your Mail has been sent successfully";
            break;
        case MFMailComposeResultFailed:
            msg1 =@"Message sending failed";
            break;
        default:
            msg1 =@"Your Mail is not Sent";
            break;
    }
    UIAlertView *mailResuletAlert = [[UIAlertView alloc]initWithFrame:CGRectMake(10, 170, 300, 120)];
    mailResuletAlert.message=msg1;
    mailResuletAlert.title=@"Message";
    [mailResuletAlert addButtonWithTitle:@"OK"];
    [mailResuletAlert show];
    [mailResuletAlert release];
    [self dismissModalViewControllerAnimated:YES];  
}