LumaJSON

An extremely simple and light-weight Swift wrapper for Objective-C JSON parser

Usage

To use this in your project, just copy the file in to your project. Normally I'm a fan of Cocoapods and all that, but it just seems unneccessary given the simplicity of what is really being done here.

Given a JSON structure such as:

{
"user": {
"name": "jquave",
"id": 542,
"url": "http://jamesonquave.com"
},
"friend_ids": [
299,
341,
492
],
"alert_message": "Please verify e-mail address to continue"
}

LumaJSON will recognize this as having a root NSDictionary node with three keys: user, friend_ids, and alert_message

These can be accessed using a subscript, and will return either an Optional LumaJSONObject or an object of the expected type if cast.

Example:

iflet parsed =LumaJSON.parse(jsonStr){
// Simple printing to the console to check JSON structure
println(parsed)
// Simple Key/Value retreival
iflet alertMessage =parsed["alert_message"]as?String{println("Alert: \(alertMessage)")}
// Nested JSON
iflet userName =parsed["user"]?["name"]as?String{println("Username is \(userName)")}
// Nested object casting works using Swift's built-in mechanisms
iflet friendIDs =parsed["friend_ids"]as?[Int]{forfriendIDin friendIDs {println("Friend ID: \(friendID)")}}}

Output to console:

LumaJSONObject: Optional({"alert_message"="Please verify e-mail address to continue";
"friend_ids"=(299,341,492);
user ={
id =542;
name = jquave;
url ="http://jamesonquave.com";
};
})Alert: Please verify e-mail address to continue
Username is jquave
Friend ID:299
Friend ID:341
Friend ID:492

Encoding Swift objects to JSON

Encoding objects as JSON requires creating an object that adheres to [String: AnyObject] at the root level.

varmyData=[String: AnyObject]()myData["friend_count"]=4myData["username"]="jquave"iflet str =LumaJSON.jsonFromObject(myData){println(str)}

Outputs:

{"username":"jquave","friend_count":4}

Under MIT License http://opensource.org/licenses/MIT