Checking a null value in Objective-C that has been returned from a JSON string

Question

I have a JSON object that is coming from a webserver.

The log is something like this:

{          
   \"status\":\"success\",
   \"Us         


        

Answer 1

Best would be if you stick to best practices - i.e. use a real data model to read JSON data.

Have a look at JSONModel - it's easy to use and it will convert [NSNUll null] to * nil * values for you automatically, so you could do your checks as usual in Obj-c like:

if (mymodel.Telephone==nil) {
  //telephone number was not provided, do something here 
}

Have a look at JSONModel's page: http://www.jsonmodel.com

Here's also a simple walk-through for creating a JSON based app: http://www.touch-code-magazine.com/how-to-make-a-youtube-app-using-mgbox-and-jsonmodel/