Question

我是swift的新手，并正在开发一个应用程序以正确学习swift。

print("checking version tab bar")
    let headers = [
        "Content-Type" : "application/json",
        "Accept"       : "application/json",
        ]

    let postData = NSMutableData(data: "client=ios".data(using: String.Encoding.utf8)!)
    postData.append("&sourcePath=sourcePath".data(using: String.Encoding.utf8)!)
    postData.append("&currentVersion=\(version)".data(using: String.Encoding.utf8)!)



    let request = NSMutableURLRequest(url: NSURL(string: "http://app.avatejaratsaba1.com/api/Values/CheckUpdate")! as URL,
                                      cachePolicy: .useProtocolCachePolicy,
                                      timeoutInterval: 10.0)
    request.httpMethod = "POST"
    request.allHTTPHeaderFields = headers
    request.httpBody = postData as Data


    let session = URLSession.shared
    let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in


        if (error != nil) {
            print(error as Any)
        }
        else
        {

            do { let json = try JSONSerialization.jsonObject(with: postData as Data, options: .allowFragments) as? NSDictionary

                let HttpResponse = response as? HTTPURLResponse



                //print( "first \(String(describing: (json!).value(forKey: "access_token")))")
                if let parseJSON = json
                {
                    let SourcePath = parseJSON["sourcePath"] as? String
                    let minVersionRequired = parseJSON["minVersion"] as? String
                    let updateVersion = parseJSON["updateVersion"] as? String
                    uupp.update.link = SourcePath!
                    if minVersionRequired?.compare(self.version , options: .numeric) == .orderedDescending
                    {
                            // compulsory update is avaiable
                        uupp.update.compulsory = true
                        print("opop")
                        let next = self.storyboard?.instantiateViewController(withIdentifier: "updatePopUp")
                        self.navigationController?.pushViewController(next!, animated: true)

                    }
                    else
                    {
                        if updateVersion?.compare(self.version , options: .numeric) == .orderedDescending
                        {
                            print("roro")
                            uupp.update.compulsory = false
                            //Optional update is availabel
                            let next = self.storyboard?.instantiateViewController(withIdentifier: "updatePopUp")
                            self.navigationController?.pushViewController(next!, animated: true)

                        }
                        else
                        {
                            //nothing
                        }


                    }

                }
                else
                {
                    print("yo")
                    //display an aler dialog with a friendly error message
                }
            }
            catch
            {
                print(response)
                print("toto")
                //Display an aler dialog with a friendly error message
                print(error)
            }
        }
    })

    dataTask.resume()

如您所见，上面的代码将应用程序的版本发送到api，并作为响应，它接收到一些数据，其中包括（最低版本为Required，更新版本为sourcePath）。正如您在我的文章中所看到的，我有一些IF语句来检查哪些条件成立或失败！但是当我运行该应用程序时，我得到了：

可选（{URL：http://app.avatejaratsaba1.com/api/Values/CheckUpdate} {状态代码：500，标题{ “内容长度” =（ 0 ）; 日期=（ “ 2018年7月23日星期一12:26:39 GMT” ）; 服务器=（红est ）; “ X-Powered-By” =（ “ ASP.NET” ）; }} 托托错误域= NSCocoaErrorDomain代码= 3840“字符0周围的值无效。” UserInfo = {NSDebugDescription =字符0周围的值无效。}

我应该发送：

    {
  "client": "string",
  "sourcePath": "string",
  "currentVersion": "string"
}

到API，响应为 { “ sourcePath”：“字符串”， “ minVersion”：“ string”， “ updateVersion”：“字符串” }

有什么建议吗？

检查快速应用程序是否有可用更新

0 个答案: