Upload image using multi-part form data in Swift

MultiPart_Image_Upload.swift

//
//  ViewController.swift
//  UploadImageDemo
//
//  Created by CodeCat15 on 9/22/20.
//

import UIKit

struct ImageResponse: Decodable
{
    let status: Int?
    let message: String?
}

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
        UploadImage()
    }

    func UploadImage(){
        // your image from Image picker, as of now I am picking image from the bundle
        let image = UIImage(named: "myimg.jpg",in: Bundle(for: type(of:self)),compatibleWith: nil)
        let imageData = image?.jpegData(compressionQuality: 0.7)

        let url =  "YOUR_UPLOAD_IMAGE_URL"
        var urlRequest = URLRequest(url: URL(string: url)!)

        urlRequest.httpMethod = "post"
        let bodyBoundary = "--------------------------\(UUID().uuidString)"
        urlRequest.addValue("multipart/form-data; boundary=\(bodyBoundary)", forHTTPHeaderField: "Content-Type")
      
        //attachmentKey is the api parameter name for your image do ask the API developer for this
       // file name is the name which you want to give to the file
        let requestData = createRequestBody(imageData: imageData!, boundary: bodyBoundary, attachmentKey: "profilePicture", fileName: "myTestImage.jpg")
        
        urlRequest.addValue("\(requestData.count)", forHTTPHeaderField: "content-length")
        urlRequest.httpBody = requestData

        URLSession.shared.dataTask(with: urlRequest) { (data, httpUrlResponse, error) in

            if(error == nil && data != nil && data?.count != 0){
                do {
                    let response = try JSONDecoder().decode(ImageResponse.self, from: data!)
                    print(response)
                }

                catch let decodingError {
                    debugPrint(decodingError)
                }
            }
        }.resume()
    }

    func createRequestBody(imageData: Data, boundary: String, attachmentKey: String, fileName: String) -> Data{
        let lineBreak = "\r\n"
        var requestBody = Data()

        requestBody.append("\(lineBreak)--\(boundary + lineBreak)" .data(using: .utf8)!)
        requestBody.append("Content-Disposition: form-data; name=\"\(attachmentKey)\"; filename=\"\(fileName)\"\(lineBreak)" .data(using: .utf8)!)
        requestBody.append("Content-Type: image/jpeg \(lineBreak + lineBreak)" .data(using: .utf8)!) // you can change the type accordingly if you want to
        requestBody.append(imageData)
        requestBody.append("\(lineBreak)--\(boundary)--\(lineBreak)" .data(using: .utf8)!)

        return requestBody
    }
}