如何使用Swift执行multipart / form-data post请求？

let Url = String(format: "http://url/ios.php") guard let serviceUrl = URL(string: Url) else { return } let parameterDictionary :[String:String] = ["Episodes" : "http://url/anime/07-ghost.html"] var request = URLRequest(url: serviceUrl) request.httpMethod = "POST" request.setValue("multipart/form-data", forHTTPHeaderField: "Content-Type") request.httpBody = NSKeyedArchiver.archivedData(withRootObject: parameterDictionary) let session = URLSession.shared session.dataTask(with: request) { (data, response, error) in if let response = response { print(response) } if let data = data { do { let json = try JSONSerialization.jsonObject(with: data, options: []) print(json) }catch { print(error) } } }.resume() } 

我收到错误

 Error Domain=NSCocoaErrorDomain Code=3840 "No value." UserInfo={NSDebugDescription=No value.} 

不确定我是否正确发送数据，我认为我设置httpbody incorectly

我甚至试过json request.setValue（“application / json”，forHTTPHeaderField：“Content-Type”）后卫让httpBody =试试？ JSONSerialization.data（withJSONObject：parameterDictionary，options：[]）else {return}

Answer 1

Swift 3，试试这个，删除responseHandler参数以及任何其他如果你的代码中没有使用它

 class func API_POST_FORM_DATA(param:[String : String], songData:Data?, fileName:String ,responseHandler : @escaping CompletionHandler) { let API_URL = API_POST_ADD_SONG_TO_PLAYLIST print("API_URL : \(API_URL)") let request = NSMutableURLRequest(url: URL(string: API_URL)!) request.httpMethod = "POST" let boundary = API_Calling.generateBoundaryString() //define the multipart request type request.setValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "Content-Type") let body = NSMutableData() let fname = fileName let mimetype = "image/png" //define the data post parameter body.append("--\(boundary)\r\n".data(using: String.Encoding.utf8)!) body.append("Content-Disposition:form-data; name=\"test\"\r\n\r\n".data(using: String.Encoding.utf8)!) body.append("hi\r\n".data(using: String.Encoding.utf8)!) body.append("--\(boundary)\r\n".data(using: String.Encoding.utf8)!) body.append("Content-Type: \(mimetype)\r\n\r\n".data(using: String.Encoding.utf8)!) if let songRawData = songData { body.append("Content-Disposition:form-data; name=\"song\"; filename=\"\(fname)\"\r\n".data(using: String.Encoding.utf8)!) body.append(songRawData) } body.append("\r\n".data(using: String.Encoding.utf8)!) body.append("--\(boundary)--\r\n".data(using: String.Encoding.utf8)!) for (key, value) in param { body.append("--\(boundary)\r\n".data(using: String.Encoding.utf8)!) body.append("Content-Disposition: form-data; name=\"\(key)\"\r\n\r\n".data(using: String.Encoding.utf8)!) body.append("\(value)\r\n".data(using: String.Encoding.utf8)!) } request.httpBody = body as Data // return body as Data print("Fire....") let session = URLSession.shared let task = session.dataTask(with: request as URLRequest) { ( data, response, error) in print("Complete") if error != nil { print("error upload : \(error)") responseHandler(nil) return } do { if let json = try JSONSerialization.jsonObject(with: data!, options: .allowFragments) as? [String: Any] { responseHandler(json as NSDictionary?) }else { print("Invalid Json") } } catch { print("Some Error") responseHandler(nil) } } task.resume() } class func generateBoundaryString() -> String { return "Boundary-\(NSUUID().uuidString)" }