Swift2.0天气预报小实例 - 解析JSON数据（内置NSJSONSerialization与第三方JSONKit）

概述import UIKitclass ViewController: UIViewController { @IBOutlet var labelWeather: UITextView! @IBAction func loadWeather(sender: AnyObject) {// loadWeather2() testJson() }

import UIKitclass VIEwController: UIVIEwController {    @IBOutlet var labelWeather: UITextVIEw!    @IBAction func loaDWeather(sender: AnyObject) {// loaDWeather2()        testJson()    }    overrIDe func vIEwDIDLoad() {        super.vIEwDIDLoad()        // Do any additional setup after loading the vIEw,typically from a nib.        //testJson()    }    overrIDe func dIDReceiveMemoryWarning() {        super.dIDReceiveMemoryWarning()        // dispose of any resources that can be recreated.    }    func loaDWeather2(){        do{            //通过天气预报API获取Json数据            let url = NSURL(string: "http://www.weather.com.cn/adat/sk/101100501.HTML")            let data = try NSData(contentsOfURL: url!,options: NSDataReadingOptions())            //NSData转换成Nsstring打印输出// let str = Nsstring(data:data,enCoding: NSUTF8StringEnCoding)// print(str)            //把NSData对象转换回JsON对象            let Json : AnyObject! = try NSJsONSerialization.JsONObjectWithData(data,options:NSJsONReadingOptions.AllowFragments)            //解析JsON数据            let weatherinfo :AnyObject = Json.objectForKey("weatherinfo")!            let city : AnyObject  = weatherinfo.objectForKey("city")! //城市            let wd : AnyObject = weatherinfo.objectForKey("WD")!   //风向            let ws : AnyObject = weatherinfo.objectForKey("WS")!   //风级            let temp : AnyObject = weatherinfo.objectForKey("temp")! //温度            //获取值            labelWeather.text = "城市：\(city)\n温度：\(temp)\n风向：\(wd)\n风速：\(ws)"        }catch{            print(error)        }    }    //使用第三方库 - JsONKit    func testJson(){        do{            let url = NSURL(string: "http://www.weather.com.cn/adat/sk/101100501.HTML")            let user = try NSData(contentsOfURL: url!,options: NSDataReadingOptions())            //由NSData 反解析回为字典            let dic = user.objectFromJsONData() as! NSDictionary            let weatherinfo :AnyObject = dic.objectForKey("weatherinfo")!            let city : AnyObject  = weatherinfo.objectForKey("city")! //城市            let wd : AnyObject = weatherinfo.objectForKey("WD")!   //风向            let ws : AnyObject = weatherinfo.objectForKey("WS")!   //风级            let temp : AnyObject = weatherinfo.objectForKey("temp")! //温度            labelWeather.text = "城市：\(city)\n温度：\(temp)\n风向：\(wd)\n风速：\(ws)"        }catch{            print(error)        }    }}

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