ios - swift 如何处理 session 中的 nsjson

Question

这是我的代码

let session =  NSURLSession.sharedSession()
        let url = NSURL(string: "http://localhost:8080/......")
        let task = session.dataTaskWithURL(url!, completionHandler: { (data, response, error ) in
            if error != nil{
                print("error code = \(error!.code)")
                print("error = \(error!)")
            }else{

                let resultJSON = NSJSONSerialization.JSONObjectWithData(data!, options: NSJSONReadingOptions())

                print("data = \(resultJSON)")

            }
        })
        task.resume()

我不知道如何处理 NSJSONSerialization.JSONObjectWithData 的 try 因为我不知道是否必须从 not 的闭包中抛出异常我确实是 Swift 的新手

Answer 1

好吧，我终于找到了解决办法

let task = session.dataTaskWithURL(url!, completionHandler: { (data, response, error ) in
            if error != nil{
                print("error code = \(error!.code)")
                print("error = \(error!)")
            }else{
                do{
                    let resultJSON = try NSJSONSerialization.JSONObjectWithData(data!, options: NSJSONReadingOptions())

                    let arrayJSON = resultJSON as! NSArray

                    for index in arrayJSON{
                        print("\(index)")
                    }
                }catch _{
                    print("received none formatted json")
                    print("\(data!)")
                }

            }
        })
        task.resume()