On Jul 5, 2009, at 1:40 PM, DKJ wrote:
I'm trying to write one of those convenient class initialisers for
one of my objects. On my still-incomplete understanding of these
matters, this is what I need to have:
Header:
+ (MyObject *)myObject;
Implementation:
+ (MyObject *)myObject
{
return [[[self alloc] init] autorelease];
}
(I'd have the usual init method in here as well, of course.)
The code above is fine.
Have I done this correctly? (My programme is crashing, but there are
plenty of other mistakes I may have made.)
If your code is crashing, avoid guessing as much as possible. *What*
is the exception? *Where* is it crashing (run the program in the
debugger to see the line of code and the stack trace)? If you put a
breakpoint a little before executing that line step through with the
debugger, do all your variables have the values you expect?
Frequent causes of crashes are uninitialized *local* variables
(*instance* variables are initialized to nil or 0), and over-
releasing. To test for over-releasing, use NSZombieEnabled (easy to
Google).
But avoid guessing.
--Andy
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