How to send form data in POST request in Swift 3 - post

Question

I am trying to post form-data using webservice, userName & password, but in response it's showing an error stating "Could not connect to the server.".
Please help me to send form data in the POST request.
let dict:[String:String] = ["userName": userName as! String, "password": password as! String]
do {
let jsonData = try JSONSerialization.data(withJSONObject: dict, options: .prettyPrinted)
let url = URL(string: "(some url)")!
var request = URLRequest(url: url)
request.httpMethod = "POST"
request.setValue("application/x-www-form-urlencoded charset=utf-8", forHTTPHeaderField: "Content-Type")
request.httpBody = jsonData
let task = URLSession.shared.dataTask(with: request) { data, response, error in
if error != nil {
print(error!.localizedDescription)
return
}
do {
let json = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as? NSDictionary
if let parseJSON = json {
let resultValue:String = parseJSON["success"] as! String;
print("result: \(resultValue)")
print(parseJSON)
}
} catch let error as NSError {
print(error)
}
}
task.resume()
} catch {
print(error.localizedDescription)
}
I've tried adding values in the request, may be some values are missing in the request formed. Please help!
Thats the POSTMAN response

Answer 1

my calling api class
class ApiService
{
static func getPostString(params:[String:Any]) -> String
{
var data = [String]()
for(key, value) in params
{
data.append(key + "=\(value)")
}
return data.map { String($0) }.joined(separator: "&")
}
static func callPost(url:URL, params:[String:Any], finish: #escaping ((message:String, data:Data?)) -> Void)
{
var request = URLRequest(url: url)
request.httpMethod = "POST"
let postString = self.getPostString(params: params)
request.httpBody = postString.data(using: .utf8)
var result:(message:String, data:Data?) = (message: "Fail", data: nil)
let task = URLSession.shared.dataTask(with: request) { data, response, error in
if(error != nil)
{
result.message = "Fail Error not null : \(error.debugDescription)"
}
else
{
result.message = "Success"
result.data = data
}
finish(result)
}
task.resume()
}
}
and when use it
ApiService.callPost(url: url, params: params, finish: finishPost)
and the finish function
func finishPost (message:String, data:Data?) -> Void
{
do
{
if let jsonData = data
{
let parsedData = try JSONDecoder().decode(Response.self, from: jsonData)
print(parsedData)
}
}
catch
{
print("Parse Error: \(error)")
}
}