Swift同步下载数据

戴维营教育代码

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/ / HTTP / HTTPS / / URL : [ url ]http : / / pic.baike.soso.com / p / 20120424 / bki -20120424022918 -1539307851. jpg[ / url ] / / 创建一个URL对象 var url = NSURL ( string : "http://pic.baike.soso.com/p/20120424/bki-20120424022918-1539307851.jpg" ) / / 创建一个HTTP请求 var request = NSURLRequest ( URL : url ) / / 发送同步请求，开始下载数据 var response : NSURLResponse? var error : NSError? var data = NSURLConnection.sendSynchronousRequest ( request , returningResponse : & response , error : & error ) println ( "\(response):\(error)" ) var httpResponse = response as NSHTTPURLResponse / / 数据下载完成 if httpResponse.statusCode = = 200 { println ( "下载了\(data.length)字节" ) data .writeToFile ( "/Users/cheetah/Desktop/test.jpg" , atomically : true ) } else { println ( "下载失败: \(httpResponse.statusCode)" ) }