如何使用Alamofire 4在Swift 3中为JSON数据发送带有参数和正文的POST请求？

Question

Postman api url added below.

Present code :

let baseUrl = "abc.com/search/"
let param  =  [
        "page":"1",
        "size":"5",
        "sortBy":"profile_locality"
    ]

    let headers = [
        "Content-Type": "application/json"
    ]


    Alamofire.SessionManager.default.request("\(baseUrl)field", method: .post,parameters: param, encoding: JSONEncoding.default, headers: headers).responseJSON { response in
        print(response.request ?? "no request")  // original URL request
        if(response.response?.statusCode != nil){
            print("done")
            if self.checkResponse(response.response!.statusCode){
                let json = JSON(data: response.data!)
                //print("at_LeadStop json \(json)")
                return completionHandler(json, false)

            } else {
                return completionHandler(JSON.null, true)
            }
        } else {
            print("gone")
            return completionHandler(JSON.null, true)
        }}

I don't know how to add body request through this code. Please help me to slove this problem.

Answer 1

You are mixing two things here, page , size and sortBy is you need to pass with the url string as query string. Now your body is request is JSON Array and you can post array with Alamofire only using URLRequest . So try like this.

let baseUrl = "abc.com/search/"
let queryStringParam  =  [
    "page":"1",
    "size":"5",
    "sortBy":"profile_locality"
]
//Make first url from this queryStringParam using URLComponents
var urlComponent = URLComponents(string: baseUrl)!
let queryItems = queryStringParam.map  { URLQueryItem(name: $0.key, value: $0.value) }
urlComponent.queryItems = queryItems

//Now make `URLRequest` and set body and headers with it
let param = [
    [
        "fieldName" : "abc",
        "fieldValue":"xyz"
    ],
    [
        "fieldName" : "123",
        "fieldValue":"789"
    ]
]
let headers = [ "Content-Type": "application/json" ]
var request = URLRequest(url: urlComponent.url!)
request.httpMethod = "POST"
request.httpBody = try? JSONSerialization.data(withJSONObject: param)
request.allHTTPHeaderFields = headers

//Now use this URLRequest with Alamofire to make request
Alamofire.request(request).responseJSON { response in
    //Your code
}

Answer 2

Try this: Using Custom Encoding

 struct JSONStringArrayEncoding: ParameterEncoding {
    private let array: [[String : Any]]

    init(array: [[String : Any]]) {
        self.array = array
    }

    func encode(_ urlRequest: URLRequestConvertible, with parameters: Parameters?) throws -> URLRequest {
        var urlRequest = try urlRequest.asURLRequest()

        let data = try JSONSerialization.data(withJSONObject: array, options: [])

        if urlRequest.value(forHTTPHeaderField: "Content-Type") == nil {
            urlRequest.setValue("application/json", forHTTPHeaderField: "Content-Type")
        }

        urlRequest.httpBody = data

        return urlRequest
    }
}

Calling

let values  = [
            [
                "fieldName" : "abc",
                "fieldValue":"xyz"
            ],
            [
                "fieldName" : "123",
                "fieldValue":"789"
            ]
        ]

        let param  =  [
            "page":"1",
            "size":"5",
            "sortBy":"profile_locality"
        ]

        let parameterEncoding = JSONStringArrayEncoding.init(array: values)

        Alamofire.request("url", method: .post, parameters: param, encoding:parameterEncoding  ).validate().response { (responseObject) in
            // do your work
        }