Comment créer et envoyer les données json au serveur à l'aide de swift langue

En utilisant la méthode http POST avec NSURLSession. Disons que vous appelez submitAction méthode sur le appuyez sur le bouton de connexion

Swift 3

@IBAction func submitAction(_ sender: UIButton) {
//declare parameter as a dictionary which contains string as key and value combination. considering inputs are valid

let parameters: [String: String] = ["name": nametextField.text, "password": passwordTextField.text]
//create the url with URL
    let url = URL(string: "http://myServerName.com/api")! //change the url

//create the session object
    let session = URLSession.shared
//now create the URLRequest object using the url object
    var request = URLRequest(url: url)
request.httpMethod = "POST" //set http method as POST

do {
request.httpBody = try JSONSerialization.data(withJSONObject: parameters, options: .prettyPrinted) //pass dictionary to nsdata object and set it as request body

} catch let error {
print(error.localizedDescription)
}
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
//create dataTask using the session object to send data to the server
    let task = session.dataTask(with: request, completionHandler: { data, response, error in
guard error == nil else {
return
}
guard let data = data else {
return
}
do {
//create json object from data
            if let json = try JSONSerialization.jsonObject(with: data, options: .mutableContainers) as? [String: Any] {
print(json)
//handle json...
            }
} catch let error {
print(error.localizedDescription)
}
})
task.resume()
}