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

when a new view loads, the old view can still be loaded in the background. you are searching for viewWillAppear as conterpart i think.

views only unload in case of a memorywarning.