Re: NSComboBox problem in 10.6.2
Re: NSComboBox problem in 10.6.2
- Subject: Re: NSComboBox problem in 10.6.2
- From: Scott Anguish <email@hidden>
- Date: Fri, 19 Mar 2010 02:16:30 -0400
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?_______________________________________________
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