How to include null value in the JSON via NSJSONSerialization?

Question

I think I get it how to use the NSJSONSerialization over all. The call I am making is:

[NSJSONSerialization dataWithJSONObject:parameters options:0 error:&a         


        

Answer 1

You have to use NSNull. For instance

Swift

let dict = ["firstKeyHasValue": 2342, "secondKeyHasNoValue": NSNull()]

Objective-C

NSDictionary *dict = @{ @"error": [NSNull null] };

From the official documentation of NSDictionary:

Neither a key nor a value can be nil; if you need to represent a null value in a dictionary, you should use NSNull.