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https://github.com/tristanhimmelman/AlamofireObjectMapper
An Alamofire extension which converts JSON response data into swift objects using ObjectMapper
https://github.com/tristanhimmelman/AlamofireObjectMapper
Last synced: 3 months ago
JSON representation
An Alamofire extension which converts JSON response data into swift objects using ObjectMapper
- Host: GitHub
- URL: https://github.com/tristanhimmelman/AlamofireObjectMapper
- Owner: tristanhimmelman
- License: mit
- Created: 2015-04-30T13:52:26.000Z (over 9 years ago)
- Default Branch: master
- Last Pushed: 2023-11-10T09:04:28.000Z (12 months ago)
- Last Synced: 2024-05-18T13:41:28.057Z (6 months ago)
- Language: Swift
- Homepage:
- Size: 248 KB
- Stars: 2,650
- Watchers: 50
- Forks: 476
- Open Issues: 62
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
AlamofireObjectMapper
============
[](https://travis-ci.org/tristanhimmelman/AlamofireObjectMapper)
[](https://github.com/tristanhimmelman/AlamofireObjectMapper)
[](https://github.com/Carthage/Carthage)
An extension to [Alamofire](https://github.com/Alamofire/Alamofire) which automatically converts JSON response data into swift objects using [ObjectMapper](https://github.com/Hearst-DD/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:
```swift
import AlamofireObjectMapper
let URL = "https://raw.githubusercontent.com/tristanhimmelman/AlamofireObjectMapper/d8bb95982be8a11a2308e779bb9a9707ebe42ede/sample_json"
Alamofire.request(URL).responseObject { (response: DataResponse) 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](https://github.com/Hearst-DD/ObjectMapper/) `Mappable` protocol. In the above example, the `WeatherResponse` object looks like the following:
```swift
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:
```swift
public func responseObject(queue: DispatchQueue? = nil, keyPath: String? = nil, mapToObject object: T? = nil, context: MapContext? = nil, completionHandler: @escaping (DataResponse) -> 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](https://github.com/Hearst-DD/ObjectMapper/#mapping-context) 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:
```json
"distance" : {
"text" : "102 ft",
"value" : 31
}
```
You can access the nested objects as follows:
```swift
func mapping(map: Map) {
distance <- map["distance.value"]
}
```
[See complete documentation](https://github.com/Hearst-DD/ObjectMapper#easy-mapping-of-nested-objects)
### 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.
```swift
let URL = "https://raw.githubusercontent.com/tristanhimmelman/AlamofireObjectMapper/2ee8f34d21e8febfdefb2b3a403f18a43818d70a/sample_keypath_json"
let expectation = expectationWithDescription("\(URL)")
Alamofire.request(URL).responseObject(keyPath: "data") { (response: DataResponse) 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:
```swift
public func responseArray(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:
```swift
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](https://cocoapods.org/) by adding the following line to your Podfile:
```
pod 'AlamofireObjectMapper', '~> 5.2'
```
If you're using [Carthage](https://github.com/Carthage/Carthage) you can add a dependency on AlamofireObjectMapper by adding it to your Cartfile:
```
github "tristanhimmelman/AlamofireObjectMapper" ~> 5.2
```