UIViewController Functions Calling Hierarchy

I have been asked this question in many interviews for iPhone Developer position. I have googled it but couldnt find a开发者_运维问答 satisfactory answer. The Question is

" what is the order of calling for the UIViewController functions " Some of functions that i know are

1. loadview
2. viewDidLoad
3. viewWillAppear
4. viewDidUnload

It goes something like this:

-loadView,
-viewDidLoad,
-viewWillAppear,
-viewDidAppear,
-viewWillDisappear,
-viewDidDisappear,
-viewDidUnload

Try to put:

 NSLog(@"%@::%@", [[self class] description], NSStringFromSelector(_cmd)); 

in every function of the above and see how things going in the log window...