Downloading and storing textures from web server

Unity Engine
1

Hello. Im new to Unity and have spent the last few days getting to know it a bit.
I have a question regarding downloading and storing textures.

Basically, what i need is this:

I am making a game who uses alot of textures and i would like to NOT have to add all the textures to the game from the start (i.e. compile them along with the rest of the game).
Rather, i want the textures to be downloaded from a server when they are needed. This was easily achieved by using the following code:

void createObj(string texture)
{
       Transform obj = (Transform)Instantiate(cardPrefab, new Vector3(0,0,0), Quaternion.identity);
        WWW www = new WWW(texture);
        StartCoroutine(WaitForRequest(www, card));
}
IEnumerator WaitForRequest(WWW www, Transform obj)
{
        yield return www;

        if (www.error == null)
        {
            Texture2D planeTexture = www.texture;
            obj.renderer.material.mainTexture = planeTexture;
        }
        else
        {
            Debug.Log("ERROR LOADING EXTERNAL IMAGE");
            
        }
}

My problem is that i would like these textures to be stored on the computer/telephone once they have been downloaded once so that the user do not have to download them again the next time he plays the game. So is there a way to make sure the images are forever cached once they are downloaded? Or can i manually download them to a specific folder on the users computer/iphone/android before using them?

I would like the game to run on iPhones/Android/PC/Mac.

I appriciate all input and help.

//Unit

2

Storing it locally can be done through System.IO.File.WriteAllBytes(www.bytes) and loading again through ReadAllBytes and then Texture2D. xxx or you use WWW

this works for standalone win / osx as well as iOS and android

in each case you just have to ensure to use the right folders, storing it relative to the app will only work on osx, but not android, iOS and will be UAC killed on windows

3

Thanks alot dreamora. This may be a dumb question, but how do i know the file structure on iphone/android?

4

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