AlamofireObjectMapper alternatives and similar libraries
Based on the "JSON" category
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EVReflection
Reflection based JSON encoding and decoding. Including support for NSDictionary, NSCoding, Printable, Hashable and Equatable -
JSONHelper
lightning fast JSON deserialization and value conversion library for iOS & OS X written in Swift. -
Genome
A simple, type safe, failure driven mapping library for serializing JSON to models in Swift 2.0. -
CodableAlamofire
An extension for Alamofire that converts JSON data into Decodable objects. -
Elevate
JSON parsing framework that leverages Swift to make parsing simple, reliable and composable. -
JSONNeverDie
Auto reflection tool from JSON to Model, user friendly JSON encoder / decoder, aims to never die. -
AlamofireJsonToObjects
An Alamofire extension which converts JSON response data into swift objects using Reflection. -
JSONFeed
JSONFeed parser with built in reader for jsonfeed.org. -
JSONParserSwift
Framework for easily parsing your JSON data directly to Swift object. -
SafeDecoder
A Codable extension to decode arrays and to catch & log all decoding failures
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README
AlamofireObjectMapper
An extension to Alamofire which automatically converts JSON response data into swift objects using ObjectMapper.
Usage
Given a URL which returns weather data in the following form:
{
"location": "Toronto, Canada",
"three_day_forecast": [
{
"conditions": "Partly cloudy",
"day" : "Monday",
"temperature": 20
},
{
"conditions": "Showers",
"day" : "Tuesday",
"temperature": 22
},
{
"conditions": "Sunny",
"day" : "Wednesday",
"temperature": 28
}
]
}
You can use the extension as the follows:
import AlamofireObjectMapper
let URL = "https://raw.githubusercontent.com/tristanhimmelman/AlamofireObjectMapper/d8bb95982be8a11a2308e779bb9a9707ebe42ede/sample_json"
Alamofire.request(URL).responseObject { (response: DataResponse<WeatherResponse>) in
let weatherResponse = response.result.value
print(weatherResponse?.location)
if let threeDayForecast = weatherResponse?.threeDayForecast {
for forecast in threeDayForecast {
print(forecast.day)
print(forecast.temperature)
}
}
}
The WeatherResponse object in the completion handler is a custom object which you define. The only requirement is that the object must conform to ObjectMapper's Mappable protocol. In the above example, the WeatherResponse object looks like the following:
import ObjectMapper
class WeatherResponse: Mappable {
var location: String?
var threeDayForecast: [Forecast]?
required init?(map: Map){
}
func mapping(map: Map) {
location <- map["location"]
threeDayForecast <- map["three_day_forecast"]
}
}
class Forecast: Mappable {
var day: String?
var temperature: Int?
var conditions: String?
required init?(map: Map){
}
func mapping(map: Map) {
day <- map["day"]
temperature <- map["temperature"]
conditions <- map["conditions"]
}
}
The extension uses Generics to allow you to create your own custom response objects. Below is the responseObject function definition. Just replace T in the completionHandler with your custom response object and the extension handles the rest:
public func responseObject<T: BaseMappable>(queue: DispatchQueue? = nil, keyPath: String? = nil, mapToObject object: T? = nil, context: MapContext? = nil, completionHandler: @escaping (DataResponse<T>) -> Void) -> Self
The responseObject function has 4 optional parameters and a required completionHandler:
queue: The queue on which the completion handler is dispatched.keyPath: The key path of the JSON where object mapping should be performed.mapToObject: An object to perform the mapping on to.context: A context object that is passed to the mapping function.completionHandler: A closure to be executed once the request has finished and the data has been mapped by ObjectMapper.
Easy Mapping of Nested Objects
AlamofireObjectMapper supports dot notation within keys for easy mapping of nested objects. Given the following JSON String:
"distance" : {
"text" : "102 ft",
"value" : 31
}
You can access the nested objects as follows:
func mapping(map: Map) {
distance <- map["distance.value"]
}
KeyPath
The keyPath variable is used to drill down into a JSON response and only map the data found at that keyPath. It supports nested values such as data.weather to drill down several levels in a JSON response.
let URL = "https://raw.githubusercontent.com/tristanhimmelman/AlamofireObjectMapper/2ee8f34d21e8febfdefb2b3a403f18a43818d70a/sample_keypath_json"
let expectation = expectationWithDescription("\(URL)")
Alamofire.request(URL).responseObject(keyPath: "data") { (response: DataResponse<WeatherResponse>) in
expectation.fulfill()
let weatherResponse = response.result.value
print(weatherResponse?.location)
if let threeDayForecast = weatherResponse?.threeDayForecast {
for forecast in threeDayForecast {
print(forecast.day)
print(forecast.temperature)
}
}
}
Array Responses
If you have an endpoint that returns data in Array form you can map it with the following function:
public func responseArray<T: Mappable>(queue queue: dispatch_queue_t? = nil, keyPath: String? = nil, completionHandler: DataResponse<[T]> -> Void) -> Self
For example, if your endpoint returns the following:
[
{
"conditions": "Partly cloudy",
"day" : "Monday",
"temperature": 20
},
{
"conditions": "Showers",
"day" : "Tuesday",
"temperature": 22
},
{
"conditions": "Sunny",
"day" : "Wednesday",
"temperature": 28
}
]
You can request and map it as follows:
let URL = "https://raw.githubusercontent.com/tristanhimmelman/AlamofireObjectMapper/f583be1121dbc5e9b0381b3017718a70c31054f7/sample_array_json"
Alamofire.request(URL).responseArray { (response: DataResponse<[Forecast]>) in
let forecastArray = response.result.value
if let forecastArray = forecastArray {
for forecast in forecastArray {
print(forecast.day)
print(forecast.temperature)
}
}
}
Installation
AlamofireObjectMapper can be added to your project using CocoaPods by adding the following line to your Podfile:
pod 'AlamofireObjectMapper', '~> 5.2'
If you're using Carthage you can add a dependency on AlamofireObjectMapper by adding it to your Cartfile:
github "tristanhimmelman/AlamofireObjectMapper" ~> 5.2