Question

Should I release NSBundle in the below code or not? NSURL should also be release or not?
I am confused.

NSBundle  *mainBundle = [NSBundle mainBundle];
NSError   *error;
NSURL     *audioURL = [NSURL fileURLWithPath:[mainBundle pathForResource:@"count_in" ofType: @"mp3"]];
AVAudioPlayer *player1 = [(AVAudioPlayer*) [AVAudioPlayer alloc] initWithContentsOfURL:audioURL error:&error];
self.player =   player1;
[self.player play];
[player1 release];

Answer 1

You should not release NSBundle and NSURL instances because you haven’t alloced these.

From the apple Documentation.

You take ownership of an object if you create it using a method whose
name begins with “alloc”, “new”,
“copy”, or “mutableCopy” (for example,
alloc, newObject, or mutableCopy), or
if you send it a retain message.

You use release or autorelease to relinquish ownership of an object.
autorelease just means “send a release
message in the future” (specifically:
when the used autorelease pool
receives a drain message—to understand
when this will be, see “Autorelease
Pools”).

I would highly recommend you to clear your memory management concept.

Read the apple article on
Memory Management Rules