Do I need to release NSString generated using @"..."?

Question

If I make an NSString using the code below, do I need to need to release someString?

NSString *someString = @"somestring";

Answer 1

No, it's a compile time constant string object, so it doesn't need releasing. It's the moral equiv of char *c = "hello world" -- where the string hello world is in global data, and you're assigning the address of this data to the pointer c.

Answer 2

No, since it's a compile-time constant string, you do not need to release it. In fact, doing so will likely cause a run-time error.

Answer 3

So, please check what Apple does under the section "Insert Data Using a POST Request" at the following link: http://developer.apple.com/safari/articles/creatingrestfulclients.html

I see a "[urlString release];", why?

thanks

Answer 4

incredible, they doesn't even try the code inside their articles oO. Thank you!

Answer 5

I checked http://developer.apple.com/safari/articles/creatingrestfulclients.html this case is different from NSString *someThing = @"someThing"; they should release urlString because of
[[NSString alloc] initWithFormat:@"%@%@", baseURLString, queryTerm];

Anywhere you use alloc/init you release it no mater what.

Answer 6

If you created an object via a method call that contains alloc, retain, or copy, or starts with new (N-A-R-C = "narc"), then you are responsible for releasing the object. If this is not the case, then you can ignore the object.

So in the case of strings:

NSString * myString = @"This is a string";

I don't see a call there to a NARC method, so you are not responsible for releasing it. It's really that simple.

Answer 7

Because constant NSString does not get released, would it cause memory problems if used extensively?