我在新升级到Swift2.0的项目中依次执行以下两个调用。letsession=NSURLSession.sharedSession()authRequest.HTTPMethod="POST"authRequest.HTTPBody=authDataauthRequest.addValue("application/json",forHTTPHeaderField:"Content-Type")authRequest.addValue("close",forHTTPHeaderField:"Connection")authRequest.addValue("application/j