unrecognized selector on NSArray : 'NSInvalidArgumentException'

Question

I am sitting since a hour on some strange exception. I try to call some method with:

for (int i = 0; i < [[DBElements objectAtIndex:index] count]; i++) {
            NSLog(@"selected Element: %@", [[DBElements objectAtIndex:index] objectAtIndex:i]);
            [self addElementsToView:dash withString:[[DBElements objectAtIndex:index] objectAtIndex:i] index:index andSubindex:i];
        }

the method is of types: - (void) addElementsToView: (UIView *) dash withString: (NSString *) type index:(NSInteger)index andSubindex : (int) i {}

NSLog shows me:

selected Element: NUMBER so the index stuff is ok. Why I get on the next step the following exception:

[__NSArrayI intValue]: unrecognized selector sent to instance 0x14d44f70 * Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSArrayI intValue]: unrecognized selector sent to instance 0x14d44f70'

UPDATE: The DBElements is:

( ( NUMBER, LABEL ), LABEL )

index is 0 i is 0. so it shows to NUMBERS of type NSString.

Split up all objectAtIndex operations into different lines, enable exception breakpoint and see where it happens exactly. It's hard to predict what you have in those arrays - maybe give a dump of data you are iterating through — Grzegorz Krukowski
Please share the code of addElementsToView too. Also pls set a breakpoint on this method - as I understand it gives the exception trying to execute this method, is it so? — nzs
So you put a breakpoint into the addElementsToView and before it captured an exception happened: with this few code information I would try to cast "withString:[[DBElements objectAtIndex:index] objectAtIndex:i]" like this: "withString:(NSString *)[[DBElements objectAtIndex:index] objectAtIndex:i]" — nzs
@codedad : Yeah, you are right. It works now. Please write the answer. — Watsche

nzs nzs · Accepted Answer · 2014-07-03T09:50:33

Try to cast

withString:[[DBElements objectAtIndex:index] objectAtIndex:i]

like this:

withString:(NSString *)[[DBElements objectAtIndex:index] objectAtIndex:i]

Hope it helps!

unrecognized selector on NSArray : 'NSInvalidArgumentException'

2 Answers