Question

我正在尝试返回变量statusCode，它应该采用NSHTTPURLResponse的statusCode属性的值，但是我得到零，即使我检查并且我看到数据已成功发布。它返回0，我已经初始化变量...我该如何解决这个问题？感谢。

var statusCode = 0

let queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)
dispatch_async(queue) {
      let request = NSMutableURLRequest(URL: NSURL(string: escapedUrl!)!)
      request.HTTPMethod = "POST"
      let task = NSURLSession.sharedSession().dataTaskWithRequest(request) {
          data, response, error in

          if error != nil {
              statusCode = 0
          } else if let httpResponse = response as? NSHTTPURLResponse {
              if httpResponse.statusCode == 200 {
                  statusCode = httpResponse.statusCode
              } else {
                  statusCode = 0
              }
          }
      }
      task.resume()
  }
  return statusCode

}

Answer 1

在异步调用返回结果之前，您将返回{% for house_name in event_data.house_list|list %} {% set home_def = salt['pillar.get']('homes:list:{}'.format(house_name)) %} ... {% endfor %}。您可以通过传递闭包并在Web服务返回结果时调用它来处理这种情况。对于该实现，方法如：

statusCode

您可以调用以下方法：

func postData(escapedUrl : String?, onCompletion:(Int)->Void)
{
    let queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)
    dispatch_async(queue)
    {
        let request = NSMutableURLRequest(URL: NSURL(string: escapedUrl!)!)
        request.HTTPMethod = "POST"
        let task = NSURLSession.sharedSession().dataTaskWithRequest(request) 
        {
            data, response, error in

            var statusCode = 0

            if error != nil
            {
                statusCode = 0
            }
            else if let httpResponse = response as? NSHTTPURLResponse
            {
                if httpResponse.statusCode == 200
                {
                    statusCode = httpResponse.statusCode
                }
                else
                {
                    statusCode = 0
                }
            }
            // Passing back the result
            onCompletion(statusCode);
        }
        task.resume()
    }
}

从变量中的NSHTTPURLResponse返回statusCode

1 个答案: