iOS Programming: The Big Nerd Ranch Guide, 6th Edition

JSON Data

JSON data, especially when it is condensed like it is in your console, may seem daunting. However, it is actually a very simple syntax. JSON can contain the most basic types used to represent model objects: arrays, dictionaries, strings, and numbers. A JSON dictionary contains one or more key-value pairs, where the key is a string and the value can be another dictionary or a string, number, or array. An array can consist of strings, numbers, dictionaries, and other arrays. Thus, a JSON document is a nested set of these types of values.

Here is an example of some really simple JSON:

{
    "name" : "Christian",
    "friends" : ["Stacy", "Mikey"],
    "job" : {
        "company" : "Big Nerd Ranch",
        "title" : "Senior Nerd"
    }
}

This JSON document ...