NSArrayM objectAtIndex: index 5 beyond bounds for empty array

Question

I'm trying to use the code from here: https://github.com/leah/PullToRefresh

but when I too big of a "pull height", I get a crash and this message:

NSArrayM objectAtIndex: index 5 beyond bounds for empty array

If my tableview cell only visit 4 cells, the crash message is instead

NSArrayM objectAtIndex: index 4 beyond bounds for empty array

etc. Please advise.

Nicolas Miari · Accepted Answer · 2012-07-05 11:18:46Z

1

Of course it is beyond bounds: your array is empty, you can not extract any object form it.

If the array has n objects, you can retrieve up to index n - 1. An empty array has 0 objects, so you can not even retrieve index 0.

answered Jul 5, 2012 at 11:18

Nicolas Miari

16.3k8 gold badges89 silver badges195 bronze badges

Sign up to request clarification or add additional context in comments.

9 Comments

Nicolas Miari Over a year ago

Well, then the second line of code ("data = [NSData...") is causing the crash; but I don't see any array. Perhaps urlAddress is already deallocated and the array error comes from inside URLWithString:?

Nicolas Miari Over a year ago

Try NSLog("Address String: %@", urlAddress); instead of data = [NSData dataWithContentsOfURL: [NSURL URLWithString: urlAddress] options:0 error:&error1];

pengwang Over a year ago

when i pull height < cell height all is ok,but when > cell height,my code is wrong

Nicolas Miari Over a year ago

The NSURL created from the string is valid too? Try NSURL* url = [NSURL URLURLWithString: urlAddress]; data = [NSData dataWithContentsOfURL: url options:0 error:&error1]; and see if url is always not-nil

pengwang Over a year ago

NSLog(@"Address URL: %@", [NSURL URLWithString: urlAddress]); not nil

|

Collectives™ on Stack Overflow

NSArrayM objectAtIndex: index 5 beyond bounds for empty array

1 Answer 1

9 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

9 Comments

Your Answer

Sign up or log in

Post as a guest

Related