iPad - dataWithContentsOfURL throws NSRangeException when I load a URL that has data

Question

Hi all... my corporate overlords want me to display image ads for our upcoming iPad application. I'm currently trying to show the image by using the following code:

- (UIImage *)getAdImage:(NSString *)adName {

NSString *adID = [self getPrivateConfigSettings:adName];
NSString *adUrl =
     [NSString stringWithFormat:[self getPrivateConfigSettings:@"eplanningURL"],
     [self getPrivateConfigSettings:@"eplanningSite"], adID];

NSData *theData =
     [NSData dataWithContentsOfURL:[NSURL URLWithString:adUrl]];

return [UIImage imageWithData: theData];
}

As it stands, its throwing the following exception:

Terminating app due to uncaught exception 'NSRangeException', reason:
'*** -[NSCFArray objectAtIndex:]: index (-1( or possibly larger))
beyond bounds (0)'

in the line where I create "theData".

However, when I check the URL I'm loading (http://ads.us.e-planning.net/eb/3/9770/19e905cdc35ec591?o=i) it has data on it.

PD: I know that code is leaky! for now I just want to find the cause of my error ;)

Answer 1

Try to manually set your URL, like this:

- (UIImage *)getAdImage:(NSString *)adName {

NSString *adUrl = @"http://ads.us.e-planning.net/eb/3/9770/19e905cdc35ec591?o=i";

NSData *theData =
     [NSData dataWithContentsOfURL:[NSURL URLWithString:adUrl]];

return [UIImage imageWithData: theData];
}

If it works fine, your problem is in retrieving the correct URL from the getPrivateConfigSettings.