Share to facebook, twitter,etc. Ios Please help out

Hello , everything works fine on Android but i dont know how to make it work for Ios, Please Help out.

 using UnityEngine;
 using System.Collections;
 using UnityEngine.UI;
 using System.IO;
 using System;
 using System.Collections.Generic;
 
 public class ShareMenu : MonoBehaviour
 {
 
     private bool isProcessing = false;
     public string AppLinkURL { get; set; }
     private string shareText = "Download This Game";
     private string gameLink = "Download the game on play store at " + "\nhttps://play.google.com/store/apps/details?id=com.CrazyDrivers";
     public void shareImage()
     {
 
         if (!isProcessing)
             StartCoroutine(ShareScreenshot());
 
     }
 
     private IEnumerator ShareScreenshot()
     {
         isProcessing = true;
         yield return new WaitForEndOfFrame();
 
 
 
 
         string destination = Path.Combine(Application.persistentDataPath, System.DateTime.Now.ToString("yyyy-MM-dd-HHmmss") + ".png");
         Debug.Log(destination);
 
         if (!Application.isEditor)
         {
             AndroidJavaClass intentClass = new AndroidJavaClass("android.content.Intent");
             AndroidJavaObject intentObject = new AndroidJavaObject("android.content.Intent");
             intentObject.Call<AndroidJavaObject>("setAction", intentClass.GetStatic<string>("ACTION_SEND"));
             AndroidJavaClass uriClass = new AndroidJavaClass("android.net.Uri");
             intentObject.Call<AndroidJavaObject>("putExtra", intentClass.GetStatic<string>("EXTRA_TEXT"), shareText + gameLink);
             intentObject.Call<AndroidJavaObject>("setType", "text/plain");
             AndroidJavaClass unity = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
             AndroidJavaObject currentActivity = unity.GetStatic<AndroidJavaObject>("currentActivity");
             currentActivity.Call("startActivity", intentObject);
 
             isProcessing = false;
 
         }
     }
 
 
     
 }

Can you somehow help me to change this code for ios to let me share to facebook,twitter,whatsapp/Because on android it works very well. I am newbie to programming And i am very bad in english. Please someone help me.

And Sorry For bad english.