使用Swift进行iOS开发时，不可避免的要进行远程的数据获取和提交。

其数据请求的方式既可能是POST也可能是GET。同不管是POST还是GET又可以分为同步请求和异步请求。 下面通过四个例子来进行演示。 1，使用POST方式提交数据（用户id和分数） （1）同步请求 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 //保存分数 func  saveScore(score: Int , userid: String ) {      let  urlString: String  =  "http://www.hangge.com/"      var  url: NSURL !      url =  NSURL (string:urlString)      let  request =  NSMutableURLRequest ( URL :url)      let  body =  "score=\(score)&user=\(userid)"      //编码POST数据      let  postData = body.dataUsingEncoding( NSUTF8StringEncoding )      //保用 POST 提交      request. HTTPMethod  =  "POST"      request. HTTPBody  = postData                //响应对象      var  response: NSURLResponse ?                do{          //发出请求          let  received: NSData ? = try  NSURLConnection .sendSynchronousRequest(request,              returningResponse: &response)          let  datastring =  NSString (data:received!, encoding:  NSUTF8StringEncoding )          print (datastring)                    }catch  let  error  as  NSError {          //打印错误消息          print (error.code)          print (error.description)      } } （2）异步请求 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 import  UIKit   class  ScoreController : NSObject ,  NSURLConnectionDataDelegate {      //保存分数      func  saveScore(score: Int , userid: String )      {          let  urlString: String  =  "http://www.hangge.com/savescore.php"          var  url: NSURL !          url =  NSURL (string:urlString)          let  request =  NSMutableURLRequest ( URL :url)          let  body =  "score=\(score)&user=\(userid)"          //编码POST数据          let  postData = body.dataUsingEncoding( NSASCIIStringEncoding )          //保用 POST 提交          request. HTTPMethod  =  "POST"          request. HTTPBody  = postData          var  conn: NSURLConnection !          conn =  NSURLConnection (request: request,delegate:  self )          conn.start()          print (conn)      }            func  connection(connection:  NSURLConnection , didReceiveResponse response:  NSURLResponse )      {          print ( "请求成功！" );          print (response)      }            func  connection(connection:  NSURLConnection , didReceiveData data:  NSData )      {          print ( "请求成功1！" );          let  datastring =  NSString (data:data, encoding:  NSUTF8StringEncoding )          print (datastring)      }            func  connectionDidFinishLoading(connection:  NSURLConnection )      {          print ( "请求成功2！" );      } } 2，使用GET方式获取数据（用户id对应的分数） （1）同步请求 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 //获取分数 func  getScore(user: String ){                let  urlString: String = "http://www.hangge.com/getscore.php?user=\(user)"      var  url: NSURL !      url =  NSURL (string:urlString)      let  request =  NSMutableURLRequest ( URL :url)      request. HTTPMethod  =  "GET"                //响应对象      var  response: NSURLResponse ?                do{          //发出请求          let  received: NSData ? = try  NSURLConnection .sendSynchronousRequest(request,              returningResponse: &response)          let  datastring =  NSString (data:received!, encoding:  NSUTF8StringEncoding )          print (datastring)                    }catch  let  error  as  NSError {          //打印错误消息          print (error.code)          print (error.description)      } } （2）异步请求 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 import  UIKit   class  ScoreController : NSObject ,  NSURLConnectionDataDelegate {      //获取分数      func  getScore(user: String )      {          let  urlString: String = "http://hangge.com/getscore.php?user=\(user)"          var  url: NSURL !          url =  NSURL (string:urlString)          let  request =  NSMutableURLRequest ( URL :url)                    request. HTTPMethod  =  "GET"          var  conn: NSURLConnection !          conn =  NSURLConnection (request: request,delegate:  self )          conn.start()          print (conn)      }            func  connection(connection:  NSURLConnection , didReceiveResponse response:  NSURLResponse )      {          print ( "请求成功！" );          print (response)      }            func  connection(connection:  NSURLConnection , didReceiveData data:  NSData )      {          print ( "请求成功1！" );          let  datastring =  NSString (data:data, encoding:  NSUTF8StringEncoding )          print (datastring)                    //解析 JSON 数据          do {              let  json :  AnyObject ! = try  NSJSONSerialization . JSONObjectWithData (data,                  options: NSJSONReadingOptions . AllowFragments )                            let  score = json.objectForKey( "score" )  as !  Int              print (score)          }catch  let  error  as  NSError {              //打印错误消息              print (error.code)              print (error.description)          }      }            func  connectionDidFinishLoading(connection:  NSURLConnection )      {          print ( "请求成功2！" );      } } 原文出自： www.hangge.com   转载请保留原文链接： http://www.hangge.com/blog/cache/detail_670.html