As per:
<http://developer.apple.com/mac/library/DOCUMENTATION/Cocoa/Conceptual/MemoryMgmt/MemoryMgmt.html
>
"You take ownership of an object if you create it using a method whose
name begins with “alloc” or “new” or contains “copy” (for example,
alloc, newObject, or mutableCopy), or if you send it a retain message.
You are responsible for relinquishing ownership of objects you own
using release or autorelease. Any other time you receive an object,
you must not release it."
If your object, at any point in its lifecycle, takes ownership of
another object then it has to release that object or you'll have a
potential resource leak. Usually the best place to do this is in the
dealloc method of the object. When dealloc is called on your object
it can run cleanup code and release anything it needs to release. The
runtime will then call dealloc on any objects that need it, and so
on. In this way your tree will traverse itself and deallocate any
resources that need to be taken care of.
This is the great thing about following the memory management
guidelines and good object oriented principles, your objects can
mostly take care of themselves if you set them up properly.
Note that if you are using garbage collection most of this goes out
the window. The runtime will handle most of it for you, however you
might still need to use stuff like the finalize method to take care of
issues other than object ownership:
<http://developer.apple.com/mac/library/DOCUMENTATION/Cocoa/Conceptual/GarbageCollection/Articles/gcEssentials.html
>
- Ken
On Oct 3, 2009, at 4:10 AM, Nick Rogers wrote:
Hi,
I have a class as following:
@interface NodeTypeOrph : NSObject {
int count;
ItemTypeOrph *key[4]; // Warning: indexing starts at 0, not 1
NodeTypeOrph *branch[5]; // Fake pointers to child nodes
}
when I'll send a release to an object of this type, will it
automatically release the arrays of ItemTypeOrph and NodeTypeOrph
objects.
Or do I have to explicitly traverse and release?
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