Question

I am new to iphone and I want to know when does -(void) dealloc method call. I know it is used to release objects but can we release any kind of object using dealloc method? And is it necessry to add this method and why we write [suped dealloc] in dealooc method?

share your views.

Answer 1

Here is the explanation straight from APPLE’s Docs

The NSObject class defines a method, dealloc, that is invoked
automatically when an object has no owners and its memory is
reclaimed—in Cocoa terminology it is “freed” or “deallocated.”.

Important

Never invoke another object’s dealloc method directly.

Here is the answer why we call [super dealloc]?

You must invoke the superclass’s implementation at the end of your
implementation. You should not tie management of system resources to
object lifetimes

When an application terminates, objects may not be sent a dealloc
message. Because the process’s memory is automatically cleared on
exit, it is more efficient simply to allow the operating system to
clean up resources than to invoke all the memory management methods.