what does the symbols array contain? are you sure it’s the length you think it
is? and what is index? It says −1 or possibly larger.
On Mar 18, 2010, at 3:38 PM, H. Miersch wrote:
> hi.
> I have a window with 3 comboboxes. one of them uses a data source. the
> problem is that it keeps throwing an exception, and i can't find out why.
> I've put the following methods in my appcontroller:
>
> -(NSInteger)numberOfItemsInComboBox:(NSComboBox *)aComboBox {
> return (NSInteger)[symbols count];
> }
>
> -(id)comboBox:(NSComboBox *)sender objectValueForItemAtIndex:(NSInteger)index
> {
> return [symbols objectAtIndex:index];
> }
>
> symbols is an NSMutableArray which can contain any number of NSStrings (I
> initialize it with 5 NSStrings)
>
> when i try to launch the app from within xcode, the console shows the
> following:
>
> 2010-03-18 19:26:28.515 StoX[63999:a0f] An uncaught exception was raised
> 2010-03-18 19:26:28.534 StoX[63999:a0f] *** -[NSCFArray objectAtIndex:]:
> index (-1 (or possibly larger)) beyond bounds (5)
> 2010-03-18 19:26:28.596 StoX[63999:a0f] *** Terminating app due to uncaught
> exception 'NSRangeException', reason: '*** -[NSCFArray objectAtIndex:]: index
> (-1 (or possibly larger)) beyond bounds (5)'
> *** Call stack at first throw:
> (
> 0 CoreFoundation 0x00007fff87ddb444
> __exceptionPreprocess + 180
> 1 libobjc.A.dylib 0x00007fff800470f3
> objc_exception_throw + 45
> 2 CoreFoundation 0x00007fff87ddb267
> +[NSException raise:format:arguments:] + 103
> 3 CoreFoundation 0x00007fff87ddb1f4
> +[NSException raise:format:] + 148
> 4 Foundation 0x00007fff8798e080
> _NSArrayRaiseBoundException + 122
> 5 Foundation 0x00007fff878f0b81 -[NSCFArray
> objectAtIndex:] + 75
> 6 AppKit 0x00007fff80ba2012
> -[NSComboBoxCell selectItemAtIndex:] + 191
> 7 StoX 0x0000000100001693
> -[AppController awakeFromNib] + 50
> 8 CoreFoundation 0x00007fff87d8a82d -[NSSet
> makeObjectsPerformSelector:] + 205
> 9 AppKit 0x00007fff8086c913
> -[NSIBObjectData nibInstantiateWithOwner:topLevelObjects:] + 1445
> 10 AppKit 0x00007fff8086ab49 loadNib + 226
> 11 AppKit 0x00007fff8086a059
> +[NSBundle(NSNibLoading) _loadNibFile:nameTable:withZone:ownerBundle:] + 248
> 12 AppKit 0x00007fff80869e91
> +[NSBundle(NSNibLoading) loadNibNamed:owner:] + 326
> 13 AppKit 0x00007fff80867413
> NSApplicationMain + 279
> 14 StoX 0x00000001000015a8 start + 52
> )
> terminate called after throwing an instance of 'NSException'
>
> i've checked that i'm using the types that the docs say i should be using,
> but i don't understand why index comes back as -1.
>
> am i doing something wrong? should I be doing something i'm not doing? is the
> documentation wrong? is there a bug
> somewhere?_______________________________________________
>
> Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)
>
> Please do not post admin requests or moderator comments to the list.
> Contact the moderators at cocoa-dev-admins(at)lists.apple.com
>
> Help/Unsubscribe/Update your Subscription:
> http://lists.apple.com/mailman/options/cocoa-dev/scott%40cocoadoc.com
>
> This email sent to sc...@cocoadoc.com
_______________________________________________
Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)
Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com
This email sent to arch...@mail-archive.com
