Alamofire wrapper with SwiftyJSON

Most iOS apps have to communicate with their backend servers. Alamofire is a very widely used library for making server calls easy and efficient. But your app may have to manage several API calls, a wrapper makes it clean and efficient. so let’s learn how to create one.

Assuming you have created a new Xcode project and initialised CocoaPods.

Add these dependencies to Podfile

pod 'Alamofire'
pod 'Alamofire-SwiftyJSON'

Create a new Swift file named AFWrapper.swift

import UIKit
import Alamofire
import SwiftyJSON
import Alamofire_SwiftyJSON

class AFWrapper: NSObject {
    static let sharedInstance = AFWrapper()

    func cancelAllRequests() {
        let sessionManager = Alamofire.SessionManager.default
        sessionManager.session.getTasksWithCompletionHandler { dataTasks, uploadTasks, downloadTasks in
            dataTasks.forEach { $0.cancel() }
            uploadTasks.forEach { $0.cancel() }
            downloadTasks.forEach { $0.cancel() }
        }
    }

    func requestGET(_ strURL: String, success:@escaping (JSON) -> Void, failure:@escaping (Error) -> Void) {

        Alamofire.request(strURL)
            .responseSwiftyJSON(completionHandler: { dataResponse in
            if dataResponse.result.isSuccess {
                let resJson = JSON(dataResponse.result.value!)
                success(resJson)
            }
            if dataResponse.result.isFailure {
                let error : Error = dataResponse.result.error!
                failure(error)
            }
        })
    }

    
    func requestPOST(_ strURL : String, params : [String : AnyObject]?, headers : [String : String]?, success:@escaping (JSON) -> Void, failure:@escaping (Error) -> Void) {
        Alamofire.request(strURL, method: .post, parameters: params, encoding: JSONEncoding.default, headers: headers)
            .responseSwiftyJSON(completionHandler: { dataResponse in
                
                if dataResponse.result.isSuccess {
                    let resJson = JSON(dataResponse.result.value!)
                    success(resJson)
                }
                
                if dataResponse.result.isFailure {
                    let error : Error = dataResponse.result.error!
                    failure(error)
                }
            })
    }

}

Example: Using it in your ViewController

AFWrapper.sharedInstance.requestGET(MY_API_URL, success: { (json) in
        
    //PARSE DATA. 
    if let myjson = json.array {
        for itemobj in myjson ?? [] {
            //parse and add obj
        }
    }

    }, failure: { (error) in
        print(error)
    })

If you want to cancel all current Alamofire requests:

AFWrapper.sharedInstance.cancelAllRequests()

For parsing data, I recommend you to go through this.