iOS开发之网络数据解析（一）--JSON解析简介

摘要：前言：对服务器请求之后，返回给客户端的数据，一般都是JSON格式或者XML格式（文件下载除外）本篇随便先讲解JSON解析。正文：关于JSON： JSON是一种轻量级的数据格式，一般用于数据交互 JSON的格式很像Objective-C中的字典和数组：{"name":"jack","age":10} 补充：　　标准的JSON格式的注意点：key必须用双引号。

关于JSON：
1 JSON是一种轻量级的数据格式，一般用于数据交互
2 JSON的格式很像Objective-C中的字典和数组：{"name":"jack","age":10}
补充：
　　标准的JSON格式的注意点：key必须用双引号。(但是在Java中是单引号)

　　JSON-OC的转换对照表

其中：null--返回OC里的NSNull类型

students.tst

{"name":"BeJson","url":"http://www.bejson.com","page":88,"isNonProfit":true,"address":{"street":"科技园路.","city":"江苏苏州","country":"中国"}}

建立继NSObject的Infor文件

import UIKit

class Infor: NSObject {
    var  isNonProfit:Int? = nil
    var name:String? = nil
    var page:Int? = nil
    var url:String? = nil
    var  address:Address? = nil
}

class Address:NSObject{
    
    var city:String? = nil
    var country:String? = nil
    var street:String? = nil
}

//
//  ViewController.swift
//  Json
//
//  Created by 。。。 on 2017/5/16.
//  Copyright © 2017年 m. All rights reserved.
//

import UIKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        //先把json读取进来
      let path = Bundle.main.path(forResource: "students", ofType: "tst")
        //let url = URL(fileURLWithPath: path)
        let url = URL(fileURLWithPath:  path!)
        let data = try! Data(contentsOf: url)
        let dic = try!
        JSONSerialization.jsonObject(with: data, options: .allowFragments) as! [String:NSObject]
        //print(dic)
        
       //简析成对象
        let infor = Infor()
        infor.name = dic["name"] as? String
        infor.isNonProfit = dic["isNonProfit"]as?Int
        infor.page = dic ["page"]as?Int
        infor.url = dic ["url"]as?String
        
        let cityDic = dic["address"] as?[String:String]
        
        let address = Address()
        address.city = cityDic?["city"]
        address.country = cityDic?["country"]
        address.street = cityDic?["street"]
        infor.address = address
        print(infor.address?.city )

}

}