ViewController.swift

//
//  ViewController.swift
//  testswift
//
//  Created by TommyLemon on 17/11/28.
//  Copyright © 2017年 https://github.com/TommyLemon/APIJSON . All rights reserved.
//

import UIKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        
        
        test()
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
    
    
    
    /**
     * 通过POST请求测试APIJSON
     */
    func test() {
        
        let url = "http://apijson.cn:8080/get";
        //要发送的请求数据
        let json = [
            //返回数据太长 "[]": [
            "User": [ //如果对象value是空的，请用[:]表示value，否则会被Swift解析为空数组[]，而不是空对象{}
                "sex": 1
            ]
            //]
        ]

        let req = toJSONString(json);

        print("start http request...\n\nURL = " + url + "\nRequest = \n" + req)
        
        //生成UI <<<<<<<<<<<<<<<<<<<<<<
        
        
        let requestLabel = UILabel(frame:CGRect(x:20, y:10, width:400, height:130))
        requestLabel.text = "Request:\n" + req;
        requestLabel.numberOfLines = 6
        self.view.addSubview(requestLabel)
        
        let responseLabel = UILabel(frame:CGRect(x:20, y:130, width:400, height:600))
        responseLabel.text = "request..."
        responseLabel.numberOfLines = 100
        self.view.addSubview(responseLabel)
        
        //生成UI >>>>>>>>>>>>>>>>>>>>>
        
    
        

        
        //请求URL
        
        let request = NSMutableURLRequest(url: URL(string: url)!)
        
        request.httpMethod = "POST"
        //设置发送的数据格式为JSON
        request.setValue("application/json", forHTTPHeaderField: "Content-Type")
        do {
            request.httpBody = try JSONSerialization.data(withJSONObject: json, options: JSONSerialization.WritingOptions.prettyPrinted)
        } catch {
            print("Something went wrong!")
        }
        
        //默认session配置
        let config = URLSessionConfiguration.default
        let session = URLSession(configuration: config)
        
        //发起请求
        let dataTask = session.dataTask(with: request as URLRequest) { (data, response, error) in
           
            print("\n\nreceived result!\n\n")

            print(data)
            print(response)
            print(error)
            
            //数据类型转换
            let jsonData:NSDictionary = try! JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as! NSDictionary
            
            print(jsonData)
            
            let res:String = self.toJSONString(jsonData as! [String : Any]);
            print("Response = \n" + res)
            
            
            //显示返回结果
            DispatchQueue.main.async {
                
                responseLabel.text = "Response:\n" + res
                print("set text end\n\n")
            }
            
        }
        
        //请求开始
        dataTask.resume()
    }
    
    func toJSONString(_ jsonData: [String: Any]!) -> String {
        guard let data = try? JSONSerialization.data(withJSONObject: jsonData!, options: [JSONSerialization.WritingOptions.prettyPrinted]) else {
            return ""
        }
        let str = String(data: data, encoding: String.Encoding.utf8)
        return str!
    }
    

}