Do I need to explicitly alloc my NSNumber?

Question

I am defining a number, as follows:

NSNumber *nn0 = [NSNumber numberWithInt:0];

It works fine without any alloc. My understanding is that i

Answer 1

The "convenience constructors" for a lot of types produce an object that is automatically "autoreleased" - i.e. the new object will be retained by the current NSAutoreleasePool. You don't need to manually release these objects - they will be released when the current NSAutoreleasePool is released/drained.

See this page for a description of convenience constructors, and how to mange the memory for these.

http://www.macdevcenter.com/pub/a/mac/2001/07/27/cocoa.html?page=3