Can't save textures on iOS (downloaded remotely)

Unity Engine
,
1

Hello,

I’ve quickly made a simple cross-promotion system (based on showing more games images inside a UI) that reads a JSON file and grabs games images from Dropbox.

It’s divided into 2 parts:

  • manager: that handles the part of grabbing and saving data inside the mobile device
  • controller that is applied to a panel in the canvas that handles the button clicks and displaying the data on canvas.

it works as supposed in Android & in Editor

The problem I get is that it doesn’t work on iOS because of this error (a real error code saved on the Analytics tool):
“”"
UnauthorizedAccessException: Access to the path ‘/var/mobile/Containers/Data/Application/FA74D4C1-A48F-498A-8D8C-46EFF50D4636/Documents4-MoreGames7.png’ is denied. System.IO.FileStream…ctor (System.String path, System.IO.FileMode mode, System.IO.FileAccess access, System.IO.FileShare share, System.Int32 bufferSize, System.Boolean anonymous, System.IO.FileOptions options) (at <00000000000000000000000000000000>:0) System.IO.File.Create (System.String path, System.Int32 bufferSize) (at <00000000000000000000000000000000>:0) System.IO.File.WriteAllBytes (System.String path, System.Byte[ ] bytes) (at <00000000000000000000000000000000>:0) MoreGManager+d__20.MoveNext () (at <00000000000000000000000000000000>:0) UnityEngine.SetupCoroutine.InvokeMoveNext (System.Collections.IEnumerator enumerator, System.IntPtr returnValueAddress) (at <00000000000000000000000000000000>:0)
“”"

Apparently, even though we’re using Application.PersistentDataPath. the Script doesn’t save it on iOS devices.

Here is the part of the code doing the saving:

IEnumerator DownloadTextureData(GameData game)
    {
        string imgUrl = game.advertisingImageLink;
        string textureName = game.textureFullName;
        UnityWebRequest www = UnityWebRequestTexture.GetTexture(imgUrl);
        yield return www.SendWebRequest();

        if (www.isNetworkError || www.isHttpError)
        {
            Debug.Log(www.error);
        }
        else
        {
            Texture2D texture2D = ((DownloadHandlerTexture)www.downloadHandler).texture;
            byte[] bytes = texture2D.EncodeToPNG();
            string filePath = Application.persistentDataPath + textureName;
            if (!File.Exists(filePath))
            {
                // Save it only if it has never been saved before!
                File.WriteAllBytes(filePath, bytes);
                savedTextures.Add(1);
#if DEBUG_CrossPromPlugin
                Debug.Log("Texture Saved to: " + Application.persistentDataPath + textureName);
#endif
            }
            else
            {
                savedTextures.Add(1);
            }
        }
    }

As you can see, I’m using Application.persistentDataPath to save the texture. Does anyone have an idea why it doesn’t work on iOS?

Kind regards

2

Look at the path. Note how Documents is mooshed into your filename:

36/Documents4-MoreGames7.png

I suggest perhaps using System.IO.Path.Combine() instead of simple string concatenation.

3

Thanks for your suggestion. I will try this