Why is viewDidUnload called less often than viewDidLoad?

Question

I put NSLog(@\"%@::%@\", [[self class] description], NSStringFromSelector(_cmd)); in both viewDidLoad and viewDidUnload of a view controll

Answer 1

I imagine that in the cases where -viewDidUnload wasn't called, the view controller was released.

1. viewDidLoad: controller loads view
2. viewDidUnload: memory warning, controller unloads view
3. viewDidLoad: controller loads view again
4. -: controller gets released, doesn't explicitly unload the view

You and up with 2 -viewDidLoad calls and 1 `-viewDidUnload' call.

Maybe also put a NSLog into the -dealloc method and see if the number of -dealloc and -viewDidUnload calls combined matches the number of -viewDidLoad calls.