问使用无法解析的标识符- Swift 3

EN

let task = URLSession.shared.dataTask(with: request) { data, response, error in

DispatchQueue.main.async {

    if let httpStatus = response as? HTTPURLResponse, httpStatus.statusCode == 200 {

        do {

        let json = try JSONSerialization.jsonObject(with: data!, options:   JSONSerialization.ReadingOptions.mutableContainers) as? [String: Any]

        guard let list = json?["response"] as? [[String : Any]] else {
                            return
                        }
        } catch {
            print("catch error...")
          }

     } //end of if let httpStatus

}//end dispacth

}//end of task

task.resume()

print(list)