Swift中用NSURLConnection解析URL，并解析Jason数据

来源：互联网发布：mac os 升级老版本编辑：程序博客网时间：2024/05/16 12:53

使用NSURL的代理方法

用NSMutableData来保存每次获得的数据

@lazy var data = NSMutableData()

用NSJSONNSerialization来解析数据

var jsonResult: NSDictionary = NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.MutableContainers, error: nil) as NSDictionary

完整的代码

import UIKitclass ViewController: UIViewController, NSURLConnectionDelegate {    lazy var data = NSMutableData()    override func viewDidLoad() {        super.viewDidLoad()    }    override func viewWillAppear(animated: Bool) {        super.viewWillAppear(animated)        let urlPath: String = "http://www.baidu.com"        var url: NSURL = NSURL(string: urlPath)        var request: NSURLRequest = NSURLRequest(URL: url)        var connection: NSURLConnection = NSURLConnection(request: request, delegate: self, startImmediately: false)        connection.start()
    }

     override func didReceiveMemoryWarning() {         super.didReceiveMemoryWarning()              }

      func connection(connection: NSURLConnection!, didReceiveData data: NSData!){         self.data.appendData(data)        }

      func connectionDidFinishLoading(connection: NSURLConnection!) {          var err: NSError        // 如果转换有错误，错误信息保存在err中

          var jsonResult: NSDictionary = NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.MutableContainers, error: err) as NSDictionary          println(jsonResult)           }}

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