- You can parse JSON using Apple's Key value coding technique with minimum lines of code.
- You can archive & unarchive your custom object in User Defaults with minimum lines of code.
- You can convert models to JSON request format e.g [String: Any] Dictionary
- You can further convert this dictionary to JSON string format
CocoaPods is a dependency manager for Cocoa projects. You can install it with the following command:
$ gem install cocoapodsTo integrate FAParser into your Xcode project using CocoaPods, specify it in your Podfile:
source 'https://github.com/CocoaPods/Specs.git'
platform :ios, '10.0'
use_frameworks!
target '<Your Target Name>' do
pod 'FAParser'
endThen, run the following command:
$ pod install- Key Value Coding
- To learn about key-value-coding, please visit Apple's official KVC documentation
- Let suppose, if following is the JSON response object of your API call
// Let say we get a JSON object of Movie as response from API call,
{
"id":"m_123456789",
"Title":"Batman",
"Year":"1989",
"Rated":"PG-13",
"Released":"23 Jun 1989",
"Runtime":"126 min",
"Genre":"Action, Adventure",
"Director":"Tim Burton",
"Writer":"Bob Kane (Batman characters), Sam Hamm (story), Sam Hamm (screenplay), Warren Skaaren (screenplay)",
"Actors":"Michael Keaton, Jack Nicholson, Kim Basinger, Robert Wuhl",
"Language":"English, French",
"Country":"USA, UK",
"Awards":"Won 1 Oscar. Another 9 wins & 22 nominations.",
"Poster":"https://images-na.ssl-images-amazon.com/images/M/MV5BMTYwNjAyODIyMF5BMl5BanBnXkFtZTYwNDMwMDk2._V1_SX300.jpg",
"Ratings":[
{
"Source":"Internet Movie Database",
"Value":"7.6/10"
},
{
"Source":"Rotten Tomatoes",
"Value":"72%"
},
{
"Source":"Metacritic",
"Value":"69/100"
}
],
"Author":{
"name" :"Fahid Attique",
"email":"[email protected]"
},
"Metascore":"69",
"imdbRating":"7.6",
"imdbVotes":"279,110",
"imdbID":"tt0096895",
"Type":"movie",
"DVD":"25 Mar 1997",
"BoxOffice":"N/A",
"Production":"Warner Bros. Pictures",
"Website":"N/A",
}import FAParser
let movie = Movie.objectfrom(json: responseFromAPI)- Make sure the name of keys of JSON response matches exactly the same with the name of properties/keys of your modal class, as Apple follows it in KVC
- For special cases like "id", you can use other names like "movie_id" or "movieID" etc
class Movie: NSObject {
// MARK: Properties
// Array of Nested JSON object
var Ratings:Array<Rating>? = nil
// Nested JSON object
var Author:Author? = nil
// JSON simple keys
var movie_id :String = "" // Special case
var Title :String = ""
var Year:String = ""
var Rated:String = ""
var Released:String = ""
var Runtime:String = ""
var Genre:String = ""
var Director:String = ""
var Writer:String = ""
var Actors:String = ""
var Language:String = ""
var Country:String = ""
var Awards:String = ""
var Poster:String = ""
var Metascore:String = ""
var imdbRating:String = ""
var imdbVotes:String = ""
var imdbID:String = ""
var Type:String = ""
var DVD:String = ""
var BoxOffice:String = ""
var Production:String = ""
var Website:String = ""
// MARK: initialization
override init() {
super.init()
}
// MARK: KVC + JSON Parsing
override func setValue(_ value: Any?, forKey key: String) {
if let aVlaue = value {
if key == "Author" { // As our JSON have nested JSON object with this key
// Parse Nested JSON using FAParser
Author = Author.objectfrom(json: value)
}
else if key == "Ratings" { // As out JSON have an array of nested JSON objects
// Parse Array of Nested JSON objects using FAParser
Ratings = Rating.objectsfrom(jsonArray: value as! Array)
}
else{ // In case of simple JSON keys i.e: Not a nested JSON object or an Array of JSON objects
if key == "id"{ // Special cases only. Otherwise no need of adding if statement
movie_id = value
}
else{
// Following code will automatically parse remaining fields of your JSON to model as their names are same as our Model properties
super.setValue(aVlaue, forKey: key)
}
}
}
}
override func setValue(_ value: Any?, forUndefinedKey key: String) {
// In case there is a key in JSON that does not exist as a property in our Model Class
print("This class is not key-value-compliant for key: \(key) & value : \(value)")
}
}
class Author: NSObject {
// MARK: Properties
var name:String = ""
var email:String = ""
// MARK: initialization
override init() {
super.init()
}
// MARK: KVC + JSON Parsing
override func setValue(_ value: Any?, forKey key: String) {
// Following code will automatically parse JSON to model as their names are same as our Model properties
super.setValue(value, forKey: key)
}
override func setValue(_ value: Any?, forUndefinedKey key: String) {
// In case there is a key in JSON that does not exist as a property in our Model Class
print("This class is not key-value-compliant for key: \(key) & value : \(value)")
}
}class Rating: NSObject {
// MARK: Properties
var Source:String = ""
var Value:String = ""
// MARK: initialization
override init() {
super.init()
}
// MARK: KVC + JSON Parsing
override func setValue(_ value: Any?, forKey key: String) {
// Following code will automatically parse JSON to model as their names are same as our Model properties
super.setValue(value, forKey: key)
}
override func setValue(_ value: Any?, forUndefinedKey key: String) {
// In case there is a key in JSON that does not exist as a property in our Model Class
print("This class is not key-value-compliant for key: \(key) & value : \(value)")
}
}
- Let say, you want to archive the Movie class object in UserDefaults. Just inherit it from Class "FAAutoCode"
import FAParser
// Subclass your Custom Modal Class with FAAutoCode Class
class Movie: FAAutoCode {
... // Additional code, if exist
// MARK: NSCoding
required init(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
}
}- All Done!!! FAAutoCode Class will automatically write the NSCoding protocols code for class Movie
// Now you can Archive your custom object with fillowing lines of code
let data = NSKeyedArchiver.archivedData(withRootObject:<custom object>)
UserDefaults.standard.set(data, forKey: "<Any Key you want>")
UserDefaults.standard.synchronize()
// To Unarchive your custom object from User Defaults, use the following code
if let data = UserDefaults.standard.value(forKey: "<Any Key you want>") {
movie = NSKeyedUnarchiver.unarchiveObject(with: data as! Data) as! <Custom Class>?
}- Let say, you want to convert Movie class object in dictionary to pass it in some api request. Just conform it to protocol "AZJSONable"
import FAParser
// conform your Modal Class with AZJSONable Protocol
class Movie: AZJSONable {
var title: String = ""
var actor: String = ""
}
- And to convert we only just need to do this
let movie: Movie = Movie()
movie.title = "La La Land"
movie.actor = "Emma Stone"
let dictFormat :[String: Any] = (movie.toDictionary()) // will convert full object to dictionary
// To convert it in JSON String
dictFormat.jsonString() // or use
dictFormat.jsonString(prettify: true)
FAParser is available under the MIT license. See the LICENSE file for more info.
Fahid Attique - (https://github.com/fahidattique55)