MFMailComposeViewController delegate not called - ios

Question

I'm not able to call Mail composer delegate method even if I'm writing below code:
-(void)openMailComposerInViewController:(UIViewController *)hostController{
if ([MFMailComposeViewController canSendMail])
{
// Email Subject
NSString *emailTitle = #"Test Email";
// Email Content
NSString *messageBody = #"Test Email";
// To address
NSArray *toRecipents = [NSArray arrayWithObject:#"support#test.com"];
mailComposer = [[MFMailComposeViewController alloc] init];
mailComposer.mailComposeDelegate = self;
[mailComposer setSubject:emailTitle];
[mailComposer setMessageBody:messageBody isHTML:NO];
[mailComposer setToRecipients:toRecipents];
// Present mail view controller on screen
[hostController presentViewController:mailComposer animated:YES completion:NULL];
mailController = hostController;
}
else
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Failure"
message:#"Your device doesn't support the composer sheet"
delegate:nil
cancelButtonTitle:#"OK"
otherButtonTitles:nil];
[alert show];
}
}
pragma mark - Mail
- (void) mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error
{
switch (result)
{
case MFMailComposeResultCancelled:
NSLog(#"Mail cancelled");
break;
case MFMailComposeResultSaved:
NSLog(#"Mail saved");
break;
case MFMailComposeResultSent:
NSLog(#"Mail sent");
break;
case MFMailComposeResultFailed:
NSLog(#"Mail sent failure: %#", [error localizedDescription]);
break;
default:
break;
}
// Close the Mail Interface
[mailController dismissViewControllerAnimated:YES completion:NULL];
}
I do not want to call mail composer on self
However, my delegate is not getting called. Please help. The application crashed on clicking on Cancel or Send mail button

Answer 1

I experienced this problem, and my problem was I had the following code:
self.mailComposer.mailComposeDelegate = self
self.mailComposer = MFMailComposeViewController()
I was setting the delegate before I initialized the mailComposer object. I just switched those 2 lines to this and it worked:
self.mailComposer = MFMailComposeViewController()
self.mailComposer.mailComposeDelegate = self

Answer 2

Because of ARC, I was losing the viewcontroller in which the delegate was written so it was not gettting called. Below code helped me fix the issue:
+(MailComposer *)sharedInstance
{
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
sharedMailComposer = [[MailComposer alloc]init];
});
return sharedMailComposer;
}
Then I used the above instance while calling the MailComposerViewController
[[MailComposer sharedInstance] openMailComposerInViewController:[(UINavigationController *)moduleRouter.container topViewController]];
It Worked :)

Answer 3

your class instance must be same for setMailComposeDelegate and presentViewController.
mailComposer.mailComposeDelegate = hostController;
[hostController presentViewController:mailComposer animated:YES completion:nil];