Question

I am getting the following error

-[NSNull isEqualToString:]: unrecognized selector sent to instance 0x3c168090

on this line of code

cell.offerTitle.text = [voucherData objectForKey:@"offer_title"];

Could someone help me correct the problem please?

Thanks
Oliver

Answer 1

Is voucherData an NSDictionary?

It’s possible there’s an NSNull in your dictionary, and when the dictionary is trying to find the object for offer_title, it’s running into trouble.

Another possibility is that [voucherData objectForKey:@"offer_title"] is returning [NSNull null], and the label is barfing when you try to pass that instead of a string.

Try setting a breakpoint in objc_exception_throw and read the stack trace – that will give you a much better idea of what’s going on.

Added:

id value = [voucherData objectForKey:@"offer_title"];
if ([value isKindOfClass:[NSNull class]])
    cell.offerTitle.text = @"";
else
    call.offerTitle.text = value;

or

id value = [voucherData objectForKey:@"offer_title"];
cell.offerTitle.text = [value isKindOfClass:[NSNull class]] ? @"" : value;