iOS: NSMutableArray is empty

Question

for (XMLProductView *pV in entries) { NSString *test = pV.appName; [allTableData addObject:test]; NSLog(@"Entries: %@", allTableData); }

In my NSString *test I get all results. Why does the NSMutableArray 'allTableData' show up Null?

Most probably you never allocated it. Objective-C will happily ignore calls to a function using a null pointer, so you can run for 100 lines with the pointer null before you discover a problem. — Hot Licks
– Hot Licks, Commented Aug 19, 2012 at 23:41

ggrana · Accepted Answer · 2012-08-20 01:23:39Z

5

It is hard to say because you added just a few information, but probably you are not allocating it correctly.

Try to add it before your for:

allTableData = [[NSMutableArray alloc] init]; for (XMLProductView *pV in entries) { NSString *test = pV.appName; [allTableData addObject:test]; } NSLog(@"Entries: %@", allTableData);

--

Edit

I edited the code to try to make it clear.

edited Aug 20, 2012 at 1:23

answered Aug 19, 2012 at 23:35

ggrana

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3 Comments

filou Over a year ago

Ok when I add this, I'm getting a SIGABRT here: pV = [allTableData objectAtIndex:indexPath.row];

eric.mitchell Over a year ago

That is probably because indexPath.row is greater than the -length of the array.

Mick MacCallum Over a year ago

@SaschaWieland are you putting this alloc/init inside the loop? If so don't, put it before the loop starts.

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