Ios 在swift 4中按下按钮时，如何将json结果发送到电子邮件？

我遇到了一个问题，我有一个json问题列表，当用户填写一般问题时，我会显示要提交的a按钮，我要做的就是使用提交按钮将json结果发送到我的电子邮件。我的代码可以吗？非常感谢你！顺便说一下，我正在使用SurveyNative创建调查

import UIKit
import SurveyNative

class MyViewController: SurveyViewController, SurveyAnswerDelegate, CustomConditionDelegate, ValidationFailedDelegate {



   override func viewDidLoad() {
      super.viewDidLoad()
      self.setSurveyAnswerDelegate(self)
      self.setCustomConditionDelegate(self)
      self.setValidationFailedDelegate(self)

    }


  override func surveyJsonFile() -> String {
      return "GeneralQuestions"
   }

   override func surveyTitle() -> String {
      return "General Questions"
   }




   func question(for id: String, answer: Any) {
      print("Question: \(id) has answer (maybe is complete): \(answer)")
      if (surveyQuestions!.isQuestionFullyAnswered(id)) {
          print("Question: \(id) is complete")
      }
   }

   func isConditionMet(answers: [String: Any], extra: [String: Any]?) -> Bool {
      let id = extra!["id"] as! String
      if id == "check_age" {
         if let birthYearStr = answers["birthyear"] as? String, let ageStr = answers["age"] as? String {
            let birthYear = Int(birthYearStr)
            let age = Int(ageStr)
            let wiggleRoom = extra!["wiggle_room"] as? Int
            let date = Date()
            let calendar = Calendar.current
            let components = calendar.dateComponents([.year], from: date)
            let currentYear =  components.year
            return abs(birthYear! + age! - currentYear!) > wiggleRoom!
         } else {
            return false
         }
      } else {
         Logger.log("Unknown custom condition check: \(id)")
         return false
      }
   }

   func validationFailed(message: String) {
      let alert = UIAlertController(title: nil, message: message, preferredStyle: UIAlertController.Style.alert)
      alert.addAction(UIAlertAction(title: "OK", style: UIAlertAction.Style.default, handler: nil))
      self.present(alert, animated: true, completion: nil)
   }






}

我的Json：

{
        "questions": [
            {
                "id": "ice_cream",
                "header": "Question 1",
                "question": "Did you enjoy the discussion topic?",
                "question_type": "single_select",
                "options": [
                    "YES",
                    "NO",
                    "I DONT KNOW",

                    {
                        "title": "Other",
                        "type": "freeform"
                    }
                ]
            },
            {
                "id": "perfect_day",
                "header": "Question 2",
                "question": "Did you enjoy the presenter? If yes, why?",
                "question_type": "single_select",
                "options": [
                    "YES",
                    "NO",
                    "I DONT KNOW",

                    {
                        "title": "Other",
                        "type": "freeform"
                    }
                ]
            },



            {
                "id": "ice_cream",
                "header": "Question 3",
                "question": "Did you feel you engaged or connected to the topic discussed?",
                "question_type": "single_select",
                "options": [
                    "YES",
                    "NO",

                    {
                        "title": "Other",
                        "type": "freeform"
                    }
                ]
            },

            {
                "id": "perfect_day",
                "header": "Question 4",
                "question": "Do you have any topics you would like to discuss?",
                "question_type": "single_select",
                "options": [
                    "YES",
                    "NO",
                    "I DONT KNOW",
                ]
            },


            {
                "id": "felt_like_adult",
                "header": "Question 5",
                "question": "Do you feel we can change anything?",
                "question_type": "single_select",
                "options": [
                    "YES",
                    "NO",
                    "I DONT KNOW",

                ]
            },



            {
                "id": "pets",
                "header": "Question 6",
                "question": "Do you prefer a specific presenter? If yes, why?",
                "question_type": "single_select",
                "options": [
                    "YES",
                    "NO",
                    "I DONT KNOW",

                   {
                        "title": "Other",
                        "type": "freeform"
                    }

                ]

            },
        ],
        "submit": {
            "button_title": "Submit Answers",
            "url": "https://www.example.com"
        },
        "auto_focus_text": true
    }

---

我能知道在电子邮件中获取JSON结果的目的吗？以下是发送电子邮件的几个选项

选择1 您可以使用MFMailComposeViewController从应用程序发送电子邮件。将JSON设置为消息体。 下面介绍如何使用MFMailComposeViewController发送电子邮件

选择2 使用API服务将电子邮件发送回您的电子邮件。例如：Gmail API。你可以看一看

选择3 创建自己的API，将JSON结果发布到服务器，并使用自己的邮件服务器接收消息