Mantle property class based on another property?
问题 How can I use Github Mantle to choose a property class based on another property in the same class? (or in the worse case another part of the JSON object). For example if i have an object like this: { "content": {"mention_text": "some text"}, "created_at": 1411750819000, "id": 600, "type": "mention" } I want to make a transformer like this: +(NSValueTransformer *)contentJSONTransformer { return [MTLValueTransformer transformerWithBlock:^id(NSDictionary* contentDict) { return [MTLJSONAdapter