swift4--使用URLSession进行网络请求

这里写了怎么拿到json数据

不知道怎么解析的小伙伴可以看我另一篇贴子 《 swift4--解析json》

//
//  ViewController.swift
//  URLSesstionTest
//


import UIKit

class ViewController: UIViewController {
    //    要传递的参数
    var keyWord:String?
    //    qq音乐搜索接口
    var urlString:String = "http://s.music.qq.com/fcgi-bin/music_search_new_platform?t=0&%20n=3&aggr=1&cr=1&loginUin=0&format=json&%20inCharset=GB2312&outCharset=utf-8&notice=0&%20platform=jqminiframe.json&needNewCode=0&p=1&catZhida=0&%20remoteplace=sizer.newclient.next_song&w="
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        keyWord = "许嵩"
        if keyWord == nil {
            print("啥都没输呢")
        }
        else {
            urlString = urlString + keyWord!
        }
//        加密，当传递的参数中含有中文时必须加密
        let newUrlString = urlString.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)
        //创建请求配置
        let config = URLSessionConfiguration.default
//        创建请求URL
        let url = URL(string: newUrlString!)
//        创建请求实例
        let request = URLRequest(url: url!)
        
//        进行请求头的设置
//        request.setValue(Any?, forKey: String)
        
//        创建请求Session
        let session = URLSession(configuration: config)
//        创建请求任务
        let task = session.dataTask(with: request) { (data,response,error) in
//            print(String(data: data! , encoding: .utf8) as Any)
//            将json数据解析成字典
            let dictionary = try? JSONSerialization.jsonObject(with: data!, options: .mutableContainers)
            print(dictionary!)
            
        }
//        激活请求任务
        task.resume()
        
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}

会返回如下的数据：