Alamofire：处理错误并返回成功响应

嗨，我对 Alamofire 和 json 还很陌生。我只是想问如何处理成功响应的错误。下面是 api 对 post 请求的响应。

{
data =     {
    "cabinet_id" = 3289146811;
    "created_at" = "2018-04-11T04:53:43.288023001Z";
    "user_id" = 123abc;
};
}

但有时由于服务器错误我得到如下响应

{
error =     {
    "http_status_code" = 400;
    message = "Unable to proceed";
    type = "rent_request_failed";
};
}

这就是我所做的

let url = "myurl"
let parameters = ["user_id": ""\(self.idPassed)"",
                          "cabinet_id": "\(self.stringPassed)"]

        Alamofire.request(url, method: .post, parameters: parameters, encoding: URLEncoding.default).responseJSON { response in

                if (response.result.isSuccess){

                    if let value = response.result.value {
//now success or failed always navigate to here                            
Helper.helper.switchToNavigationViewController(Navigation: "hundredpercent")
                        print(value)

                    }
                //do your json stuff
                } else if (response.result.isFailure) {
                //Manager your error
                switch (response.error!._code){
                case NSURLErrorTimedOut:
                //Manager your time out error
                break
                case NSURLErrorNotConnectedToInternet:
                //Manager your not connected to internet error
                break
                default:
                    let alertt = UIAlertController(title: "Server Error!", message: "Please try again", preferredStyle: .alert)

                    alertt.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.default, handler: {(action:UIAlertAction!) in
//need navigate here if error                        
Helper.helper.switchToNavigationViewController(Navigation: "qrcodescan")

                    }))

                    self.present(alertt, animated: true)
                }
                }
        }

通过添加在调用 API 时验证响应状态代码validate(statusCode: 200..<299)根据阿拉莫菲尔的要求。

如果您的http状态代码位于区间内，它将验证成功200-299否则进入失败案例。

        // Call response handler method of alamofire
        Alamofire.request(url, method: .post, parameters: parameters, encoding: URLEncoding.default).validate(statusCode: 200..<299).responseJSON(completionHandler: { response in

            switch response.result {
            case .success(let data): 
                Logs.DLog(object: "\n Success: \(response)")

                // Do your code here...

            case .failure(let error):
                Logs.DLog(object: "\n Failure: \(error.localizedDescription)")

                // Do your code here...

            }
        })