import UIKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        JsonGPL()
    }
    func JsonGPL()
    {
        //Json对象
        let user:[String: Any] = [
            "uname": "张三",
            "tel": ["mobile": "138", "home": "010"]
        ]
        //判断是否JSon格式
        if !JSONSerialization.isValidJSONObject(user) {
            print("is not a valid json object")
        }
        //利用自带的json库转换成Data
        //设置options为JSONSerialization.WritingOptions.prettyPrinted，则打印格式更好阅读
        let data = try? JSONSerialization.data(withJSONObject: user, options: .prettyPrinted)
        let Jsonstr = String(data: data!, encoding: .utf8)
        print("Jsonstr============\(Jsonstr)")
        //Data转换JSON
        let Json2 = try? JSONSerialization.jsonObject(with: data!, options: .allowFragments) as! [String: Any]
        print("Json2=============\(Json2)")
        if !JSONSerialization.isValidJSONObject(Json2) {
            print("Json2 is not a valid json object")
        }
        //验证JSON对象可用性
        let uname = Json2?["uname"]
        let mobile = (Json2?["tel"] as! [String: Any])["mobile"]
        print("get Json Object:","uname: \(uname), mobile: \(mobile)")
        
        
        
        
        
    }

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


}