IPhone SDK: Delegation Method Not Called - Troubleshooting

Question

If the Delegate method is not called, then all things need to be checked only to ensure that the delegate is referenced in viewController?

Answer 1

Well, first you need to follow the protocol in your header:

@interface MyViewController : UIViewController < YOUR DELEGATE PROTOCOL HERE , 
 UITableViewDelegate>{ } @end 

This is the most common mistake, anyway.

Also just make sure you install the delegate. You can usually do this as follows:

 myObject.delegate = self; 

Although some classes do this upon initialization:

 UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"MY APP" 
 message:@"HELLO" 
 delegate: self 
 cancelButtonTitle:@"CLOSE" 
 otherButtonTitles:nil]; 

Answer 2

If delegate methods are not called when you expect them, you may not actually have connected a delegate. This can be done either in code or in the interface builder. For example, a UITableView in an interface builder can have its own dataSource and delegate outputs attached to the target, for example, “file owner”.