Binary writer not saving game data on iOS builds

Hi all

Im really stuck here as this problem is stopping the iOS release of my game. I am using binary writer to save data such as currency gains and level unlock data. Everything works perfectly in the editor but when i build to iOS, it does not save, along with my high score which uses playerprefs.

I have researched and seen answers for a similar issue with binary formatter but i used binary writer. I have tried to use Environment.SetEnvironmentVariable ("MONO_REFLECTION_SERIALIZER", "yes"); in an awake function but it has not helped.

Im really desperate for any help. I reiterate, everything works in editor, but not on iOS. See some of my scripts below for encryption and currency saves:-

using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Security.Cryptography; using System.Text;

class Encryption

{

 private byte[] IV = { 0x6c, 0x1e, 0x85, 0x5e, 0x97, 0x4a, 0x9e, 0x39, 0x9b, 0x80, 0x33, 0x31, 0x5d, 0x76, 0x6e, 0xc5 };
 private byte[] Key = { 0x78, 0x06, 0x2f, 0x16, 0x3a, 0x5f, 0x4d, 0xcc, 0xe4, 0x28, 0xb7, 0x6f, 0x75, 0x1b, 0xd4, 0xb8 };


 public void save(string toFile, int currency)
 {

     FileStream fileStream = new FileStream(toFile, FileMode.Create);
     RijndaelManaged RMCrypto = new RijndaelManaged();


     CryptoStream CryptStream = new CryptoStream(fileStream, RMCrypto.CreateEncryptor(Key, IV), CryptoStreamMode.Write);
     BinaryWriter writer = new BinaryWriter(CryptStream);

     writer.Write(currency);

     writer.Close();
     CryptStream.Close();
     fileStream.Close();

 }

 public int load(string fromFile)
 {

     if (!File.Exists(fromFile))
         return 0;

     try
     {

         FileStream fileStream = new FileStream(fromFile, FileMode.Open);
         RijndaelManaged RMCrypto = new RijndaelManaged();


         CryptoStream CryptStream = new CryptoStream(fileStream, RMCrypto.CreateDecryptor(Key, IV), CryptoStreamMode.Read);
         BinaryReader reader = new BinaryReader(CryptStream);

         int currency = reader.ReadInt32();

         reader.Close();
         CryptStream.Close();
         fileStream.Close();

         return currency;

     }
     catch(Exception e)
     {

         return -1;

     }

 }

}

This is for the currency script

using UnityEngine; using System.Collections; using System;

public class Currency : MonoBehaviour {

 public static Currency instance;
 public string file = "currency.bin";//The file to save data in

 private int currency;
 private Encryption encrypter;

 void Start()
 {
     encrypter = new Encryption();
     instance = this;
     load();

 }

 public void save()
 {

     encrypter.save(file, currency);

 }

 public void load()
 {

     currency = encrypter.load(file);

     if(currency == -1)
     {

         Debug.LogError("Issue loading file");
         currency = 0;

     }

 }

 public int get()
 {

     return currency;

 }

 public void add(int toAdd)
 {

     currency += toAdd;

 }

 public void remove(int toRemove)
 {

     currency -= toRemove;

 }

 public void addS(int toAdd)
 {

     add(toAdd);
     save();

 }

 public void removeS(int toRemove)
 {

     remove(toRemove);
     save();

 }

}