Ios 在Swift中将NSMutableData转换为NSString

目前，我正在和斯威夫特一起玩

我想用

NSURLConnection

做一个小型下载程序。到目前为止一切正常，但我有两个问题

为什么我无法将响应数据转换为

NSString

我如何将我的网站从

nsurresponse

转换为

nshtpurlresponse

到目前为止，我的代码如下所示：

import Foundation

class Downloader: NSObject, NSURLConnectionDelegate {

    let urlString: String
    var responseData: NSMutableData = NSMutableData()
    var responseMessage: NSURLResponse = NSURLResponse()

    init(urlString: String) {
        self.urlString = urlString.stringByAddingPercentEscapesUsingEncoding(NSUTF8StringEncoding);
    }

    func startDownloaderWithUrl() {
        let url: NSURL = NSURL.URLWithString(self.urlString);
        let r: NSURLRequest = NSURLRequest(URL: url);
        let connection:NSURLConnection = NSURLConnection(
            request: r,
            delegate: self,
            startImmediately: true);
    }

    func connection(connection: NSURLConnection!, didFailWithError error: NSError!) {
        NSLog("Connection failed.\(error.localizedDescription)")
    }

    func connection(connection: NSURLConnection, didRecieveResponse response: NSURLResponse)  {
        NSLog("Recieved response")
        self.responseMessage = response;
    }

    func connection(didReceiveResponse: NSURLConnection!, didReceiveResponse response: NSURLResponse!) {
        self.responseData = NSMutableData()
    }

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

    func connectionDidFinishLoading(connection: NSURLConnection!) {
        let responseString: NSString = NSString(data: self.responseData, encoding: NSUTF8StringEncoding);

        NSLog("%@", "Finished Loading");
        //NSLog("%@", self.responseData);
        NSLog("%@", responseString);
    }
 }

---

我的

responseString

始终是

nil

，尽管我的

responseData

有大量字节。第二，如何将响应消息转换为

nshtpurlresponse

？

将NSMutableData转换为字符串

var YourSting = NSString(data responseData: NSData!, encoding encoding: UInt)

---

将编码更改为ASCII对我很有效。

试试看

func connection(didReceiveResponse: NSURLConnection!, didReceiveResponse response: NSURLResponse!) {
    self.data = NSMutableData()
}

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

func connectionDidFinishLoading(connection: NSURLConnection!) {
    var dta = NSString(data: data, encoding: NSUTF8StringEncoding)
    println("the string is: \(dta)")

    }

---

我认为您的实现是正确的，请检查编码，而不是尝试

NSASCIIStringEncoding

Ok我使用的是错误的编码。NSASCIIStringEncoding按预期工作。但我确信在以前的纯Objective-C项目中，NSUTF8String编码对我是有效的。也许你知道如何将NSURLRepsonse转换为NSHTTPURLRResponse？我想它应该是这样的

var urlRsponse=self.response消息作为NSHTTPURLResponse

？谢谢，但我使用的编码是错误的。我必须再等一天才能接受我自己的答案。