ios - 如何使用swift语言创建json数据并将其发送到服务器

Question

我是IOS开发新手，刚开始接触swift语言。

我正在尝试从两个文本字段中获取值并将这两个文本字段转换为 json 并将该 json 发送到服务器 receive.php。

让我们假设两个文本字段是- 姓名- 通过

如何创建 Json 并在单击按钮时将其发送到服务器？

Answer 1

通过使用带有 URLSession 的 http POST 方法。假设您在按下登录按钮时调用 submitAction 方法

Swift 4 及更高版本

@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()
}