JSONStringToDictionary.swift

import UIKit
import AVFoundation

//JSON String -> Dictionary

let jsonText = "{\"anotherKey\":\"anotherValue\",\"aKey\":\"aValue\"}"

var dictonary:NSDictionary?

if let data = jsonText.dataUsingEncoding(NSUTF8StringEncoding) {
    
    do {
        dictonary =  try NSJSONSerialization.JSONObjectWithData(data, options: []) as? [String:AnyObject]
    } catch let error as NSError {
        print(error)
    }
}