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
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//保存分数func saveScore(score:Int, userid:String){ var url:NSURL! url = NSURL(string:urlString) var request = NSMutableURLRequest(URL:url) var body = "score=(score)&user=(userid)" //编码POST数据 var postData = body.dataUsingEncoding(NSUTF8StringEncoding) //保用 POST 提交 request.HTTPMethod = "POST" request.HTTPBody = postData //响应对象 var response:NSURLResponse? //错误对象 var error:NSError? //发出请求 var received:NSData? = NSURLConnection.sendSynchronousRequest(request, returningResponse: &response, error: &error) if(error != nil){ println(error?.code) println(error?.description) }else{ var datastring = NSString(data:received!, encoding: NSUTF8StringEncoding) println(datastring) }} |
（2）异步请求
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import UIKitclass ScoreController:NSObject, NSURLConnectionDataDelegate{ //保存分数 func saveScore(score:Int, userid:String) { var url:NSURL! url = NSURL(string:urlString) var request = NSMutableURLRequest(URL:url) var body = "score=(score)&user=(userid)" //编码POST数据 var 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() println(conn) } func connection(connection: NSURLConnection!, didReceiveResponse response: NSURLResponse!) { println("请求成功！"); println(response) } func connection(connection: NSURLConnection!, didReceiveData data: NSData!) { println("请求成功1！"); var datastring = NSString(data:data, encoding: NSUTF8StringEncoding) println(datastring) } func connectionDidFinishLoading(connection: NSURLConnection!) { println("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
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//获取分数func getScore(user:String){ var url:NSURL! url = NSURL(string:urlString) var request = NSMutableURLRequest(URL:url) request.HTTPMethod = "GET" //响应对象 var response:NSURLResponse? //错误对象 var error:NSError? //发出请求 var received:NSData? = NSURLConnection.sendSynchronousRequest(request, returningResponse: &response, error: &error) if(error != nil){ println(error?.code) println(error?.description) }else{ var datastring = NSString(data:received!, encoding: NSUTF8StringEncoding) println(datastring) }} |
（2）异步请求
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import UIKitclass ScoreController:NSObject, NSURLConnectionDataDelegate{ //获取分数 func getScore(user:String) { var url:NSURL! url = NSURL(string:urlString) var request = NSMutableURLRequest(URL:url) var body = "user=(user)" request.HTTPMethod = "GET" var conn:NSURLConnection! conn = NSURLConnection(request: request,delegate: self) conn.start() println(conn) } func connection(connection: NSURLConnection!, didReceiveResponse response: NSURLResponse!) { println("请求成功！"); println(response) } func connection(connection: NSURLConnection!, didReceiveData data: NSData!) { println("请求成功1！"); var datastring = NSString(data:data, encoding: NSUTF8StringEncoding) println(datastring) //解析 JSON 数据 var json : AnyObject! = NSJSONSerialization.JSONObjectWithData(data, options:NSJSONReadingOptions.AllowFragments,error:nil) var score = json.objectForKey("score") as Int println(score) } func connectionDidFinishLoading(connection: NSURLConnection!) { println("请求成功2！"); }} |