Load all existent files (sprites) from Application.persistentDataPath? Unity - unity3d

Question

In my game, you can take screenshots of the world, which are saved in Application.persistentDataPath. I want to make a gallery where you can then see all these screenshots. Because you need to write to the file, I can't use Resources folder or Application.streamingAssetsPath. I could read the files one sprite at a time, using the name, but that's not really practical. So how could I load all files and add them to an array or list? I basically need the equivalent of Resources.LoadAll(). Does anyone know how to achieve this?

Answer 1

You can use Directory.GetFiles(string,string) to return all filepaths in the persistentData folder e.g. by file extension ("*.jpg")
Then you can use e.g. UnityWebRequestTexture.GetTexture also on local file paths and load assets from the persistent data path like
public Dictionary<string, Texture2D> textures = new Dictionary<string, Texture2D>();
private void Start()
{
var fileNames = Directory.GetFiles(Application.persistentDataPath, "*.jpg");
foreach(var fileName in fileNames)
{
StartCoroutine (LoadFile(fileName));
}
}
private IEnumerator LoadFile(string filePath)
{
using (UnityWebRequest uwr = UnityWebRequestTexture.GetTexture(filePath))
{
yield return uwr.SendWebRequest();
if (uwr.isNetworkError || uwr.isHttpError)
{
Debug.Log(uwr.error);
}
else
{
// Get downloaded asset bundle
var texture = DownloadHandlerTexture.GetContent(uwr);
// Something with the texture e.g.
// store it to later access it by fileName
var fileName = Path.GetFileName(filePath);
textures[fileName] = texture;
}
}
}