ios – NSURLSessionUploadTask如何读取服务器响应

以下是我的代码的一些部分不完整

let session:NSURLSession = NSURLSession(configuration: config,delegate: self,delegateQueue: NSOperationQueue .mainQueue())

let sessionTask:NSURLSessionUploadTask = session.uploadTaskWithStreamedRequest(request

但问题是我无法得到服务器发回的JSON响应.

以下代表也不会触发,但其他代表正在触发

func URLSession(session: NSURLSession,dataTask: NSURLSessionDataTask,didReceiveData data: NSData)

我使用的代码：

func sendFiletoServer1(fileName:String,fileData:NSData,serverURL:String){

let body = NSMutableData()

let mimetype = "application/octet-stream"
//        let mimetype = "video/quicktime"

let boundary = "Boundary-\(NSUUID().UUIDString)"
let url = NSURL(string: serverURL)

let request = NSMutableuRLRequest(URL: url!)
request.HTTPMethod = "POST"
request.setValue("multipart/form-data; boundary=----\(boundary)",forHTTPHeaderField: "Content-Type")
body.appendData("------\(boundary)\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
body.appendData("Content-disposition:form-data; name=\"file\"; filename=\"\(fileName)\"\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
body.appendData("Content-Type: \(mimetype)\r\n\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
body.appendData(fileData)
body.appendData("\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
body.appendData("------\(boundary)\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
body.appendData("Content-disposition:form-data; name=\"submit\"\r\n\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
body.appendData("Submit\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
body.appendData("------\(boundary)--\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
request.HTTPBody=body

let config:NSURLSessionConfiguration = NSURLSessionConfiguration.defaultSessionConfiguration()
let session:NSURLSession = NSURLSession(configuration: config,delegateQueue: NSOperationQueue .mainQueue())
let sessionTask:NSURLSessionUploadTask = session.uploadTaskWithStreamedRequest(request)
sessionTask.resume()
}

func URLSession(session: NSURLSession,didBecomeInvalidWithError error: NSError?) {
    print("error")
 }

func URLSession(session: NSURLSession,task: NSURLSessionTask,didSendBodyData bytesSent: Int64,totalBytesSent: Int64,totalBytesExpectedToSend: Int64) {
    print("Bytes sent:\(bytesSent) Total bytes sent:\(totalBytesSent) Total bytes expected to send:\(totalBytesExpectedToSend)")
}

func URLSession(session: NSURLSession,didReceiveResponse response: NSURLResponse,completionHandler: (NSURLSessionResponsedisposition) -> Void) {
    print("response:\(response as! NSHTTPURLResponse)")
}

func URLSession(session: NSURLSession,didReceiveData data: NSData) {
    print("data didReceiveData")
}

我已经符合代表们的意愿

> NSURLSessionDataDelegate
> NSURLSessionDelegate
> NSURLSessionTaskDelegate

谢谢