iOS Checking null value

[erdinc27]

I got Json data from webservice. But i have a problem. The data comes like this

{
    hediyeCom = "(null)";
....
....
}

i check null value like this

 if ([giftDictionary objectForKey:@"hediyeCom"] == [NSNull null]) {
NSLog(@"NULL");
    }

But it doesnt fall down in if state. How can i check the null value ?

 

[Guiyon]

I got Json data from webservice. But i have a problem. The data comes like this

{
    hediyeCom = "(null)";
....
....
}

i check null value like this

 if ([giftDictionary objectForKey:@"hediyeCom"] == [NSNull null]) {
NSLog(@"NULL");
    }

But it doesnt fall down in if state. How can i check the null value ?

Depending on the JSON response you're getting, there are a couple of possibilities here. First, the `hediyeCom` key might not even be in the response, in which case you'd be getting back a nil value for that key, not a NSNull object (in this case, giftDictionary[@"hediyeCom"] == nil instead of giftDictionary[@"hediyeCom"] == [NSNull null]). If the excerpt you've shown above is the actual JSON response, the value might be the literal string "(null)". I'd try adding a

NSLog(@"%@",giftDictionary[@"hediyeCom"]);

call or adding a breakpoint right before the if statement to see exactly what you're working with.

 

[erdinc27]

Depending on the JSON response you're getting, there are a couple of possibilities here. First, the `hediyeCom` key might not even be in the response, in which case you'd be getting back a nil value for that key, not a NSNull object (in this case, giftDictionary[@"hediyeCom"] == nil instead of giftDictionary[@"hediyeCom"] == [NSNull null]). If the excerpt you've shown above is the actual JSON response, the value might be the literal string "(null)". I'd try adding a

NSLog(@"%@",giftDictionary[@"hediyeCom"]);

call or adding a breakpoint right before the if statement to see exactly what you're working with.

thank you for your response buddy. It was an actual response actually and the response was not a null as you said it was a string "(null)" so i can handle it now. Thank you for the help.

 

[PhoneyDeveloper]

That is not a standard JSON representation of null. If you have access to the server authors you might ask them the reason for not getting back a standard null.