TableView crashing if Empty Array, how to fix?

Question

I'm using RestKit to pull data from a web service API, and when the API response with an empty array for "Image", the UITableView crashes.

I was wondering if an "if statement" would be best to solve the problem?

cellForRowAtIndexPath, which works perfectly when there is an Image Array:

Images *imageLocal = [apiResponseLocal.images objectAtIndex:0];
NSString *imageURL = [NSString stringWithFormat:@"%@", imageLocal.url];

My best guess that doesn't work for the "if statement"

if ([imageURL isEqualToString:@""])
    {
    [cell.imageView setImageWithURL:[NSURL URLWithString:@"http://staticimage.com/to/use/when/no/image/from/api"] placeholderImage:[UIImage imageNamed:@"placeholder.png"]];
    }
    else
    {
    [cell.imageView setImageWithURL:[NSURL URLWithString:[NSString stringWithFormat:@"%@", imageURL]] placeholderImage:[UIImage imageNamed:@"placeholder"]];
    }

I'm not sure if I'm on the right trail trying to solve with an "if statement", or what that actual statement might be. Any help would be much appreciated!

EDIT: Error & Crash I get when there is no image in the NSArray and I try scrolling the TableView toward that particular cell is "_NSArrayM objectAtIndex:]: index 0 beyond bounds for empty array"

Well obviously you're not going to get much of an image from an empty string, if that's what you're asking. — Hot Licks
– Hot Licks, Commented May 25, 2013 at 20:02
@HotLicks correct. I'm trying to place an Image in the ImageView spot if the Image array returned from the API is empty. You know what I mean? If I don't get anything back from them, I can put a Image of my own in there. — Realinstomp
– Realinstomp, Commented May 25, 2013 at 20:08
The TableView crashes as it stands now saying: "_NSArrayM objectAtIndex:]: index 0 beyond bounds for empty array". So I need to create some way for if there is no image in the array, for the TableView to not crash because of that specific TableViewCell. Know what I mean? — Realinstomp
– Realinstomp, Commented May 25, 2013 at 20:52

uchuugaka · Accepted Answer · 2013-05-25 21:02:11Z

3

You need to check your array count and handle if it is less than 1 before accessing any index. That's the place to do your default no-image image URL logic.

answered May 25, 2013 at 21:02

uchuugaka

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1 Comment

Realinstomp Over a year ago

Thanks for the helpful response! I will try that out today

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