UIAlertView Button Clicked Methods - objective-c

Question

In my email composer I would like for the result of 'cancelbuttonclicked' to close the MFMailComposerViewController. Can I implement within the switch statement or do those need to be separate methods. Also, I would like for the send button to send the message before dismissing.
- (void)mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error {
switch (result) {
case MFMailComposeResultSent:{
UIAlertView *messageSent = [[UIAlertView alloc] initWithTitle:#"Message Sent" message:#"Your message has been sent" delegate:self cancelButtonTitle:#"OK" otherButtonTitles:nil];
[messageSent show];
break;
}
case MFMailComposeResultSaved:{
UIAlertView *messageComposeResultSaved = [[UIAlertView alloc] initWithTitle:#"Message Saved" message:#"Your message has been saved" delegate:self cancelButtonTitle:#"OK" otherButtonTitles:nil];
[messageComposeResultSaved show];
break;
}
case MFMailComposeResultCancelled:{
UIAlertView *messageComposeResultCancelled = [[UIAlertView alloc] initWithTitle:#"Message Cancelled" message:#"Your message has been cancelled" delegate:self cancelButtonTitle:#"OK" otherButtonTitles: nil];
[messageComposeResultCancelled show];
break;}
case MFMailComposeResultFailed:{
UIAlertView *messageFailed = [[UIAlertView alloc]initWithTitle:#"Message Failed" message:#"Your message could not be sent" delegate:self cancelButtonTitle:#"OK" otherButtonTitles:nil];
[messageFailed show];
break;
}
}
}

Answer 1

Your code should work fine. There are no limitations on using UIAlertView inside a switch. However, to make it a bit less messy, I'd suggest rewriting it like this:
- (void)mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error {
NSString *alertTitle = nil;
NSString *alertMessage = nil;
switch (result) {
case MFMailComposeResultSent:{
alertTitle = #"Message Sent";
alertMessage = #"Your message has been sent";
break;
}
case MFMailComposeResultSaved:{
alertTitle = #"Message Saved";
alertMessage = #"Your message has been saved";
break;
}
case MFMailComposeResultCancelled:{
alertTitle = #"Message Cancelled";
alertMessage = #"Your message has been cancelled";
break;}
case MFMailComposeResultFailed:{
alertTitle = #"Message Failed";
alertMessage = #"Your message could not be sent";
break;
}
}
[[[UIAlertView alloc] initWithTitle:alertTitle
message:alertMessage
delegate:self
cancelButtonTitle:#"OK"
otherButtonTitles:nil] show];
}
It lets you avoid multiple initWithTitle....
But there is another concern: UIAlertView is deprecated is iOS 8. You should use UIAlertController instead. This answer has an example of UIAlertController usage.