NSDictionary supports the JSONRepresentation method which is quite useful for generating JSON to send to servers. I recently had an issue where if one of my object's members was null, the JSONRepresentation would fail. If I set the member NSString to @"", then "" would get sent across, but what I really wanted was "member":null to be sent.
The solution is to set your object to [NSNull null], and then the correct JSONRepresentation will be created.
Thursday, November 4, 2010
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