Whenever I try to add a new item, the app crashes. I don't get the
normal gdb window: instead I get a window that says 'loading stack
frames' and the assembly code. The line that the program seems to be
stuck on is this:
0x92efbfe2 <+0018> call 0x92efbfe7 <CFBagAddValue+23>
But here's the really strange part: if I have only one column bound to
the array controller (any one: chemid, name, OR description), the
whole
thing works fine. I'm completely stumped.
When I build your project, I get:
/tmp/ChemTrak/MyDocument.xcdatamodel: Chemical.description: warning
Chemical.description -- property name conflicts with a method already
on NSObject or NSManagedObject
That's bad.
You should always review the warnings and eliminate as many as
possible. Once you start writing 64 bit code, warnings become
synonymous with errors. What were once harmless casting or missing
function declarations will just start crashing.
There are approximately 75 reserved property names. Basically
anything you see in NSObject.h or NSManagedObject.h. Unfortunately,
neither Objective-C nor Key Value Coding have any namespace features
to isolate different naming scopes.
Categories people put on NSObject (in frameworks and such) can create
more, but imho putting a category on a class whose implementation does
not belong to you, in anything besides your own 100% self contained
code base, is an error. Regardless, it's rude to pollute our limited
global namespace.
- Ben
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