iOS screenshot system out of memory error

Unity Engine
1

hi everyone!
i’m making an app that use a lot high poly models and this is using a lot of memory (about 300 mb ram).
it’s running great and now i created a screenshot system.
i’m using

Application.CaptureScreenshot("/screenshots/" + _screenShotName +".png");

for capture screenshot and I made a thumbnail preview function called on OnGUI.

The app show one thumbnail at time and user can change by tabbing the prev/next arrow.

I used just one

private Texture2D _tempTexture;

and all screenshots are load in this texture.

this is the function:

private void drawThumbnail()

{
    if(GUI.Button(new Rect(118,408,29f/2,47/2),GUIManager.Instance.GetTexture("back"), GUIStyle.none))
    {
        if(_screenShotIndexForPreview > 0)
        {
            _screenShotIndexForPreview--;

            StartCoroutine (loadScreenShotPNG(_screenShotNames[_screenShotIndexForPreview]));
        }
    }


    if(GUI.Button(new Rect(320,408,29f/2,47/2),GUIManager.Instance.GetTexture("next"), GUIStyle.none))
    {
        //if is not the last image
        if(_screenShotIndexForPreview < _screenShotNames.Length - 2)
        {
            _screenShotIndexForPreview++;

            StartCoroutine (loadScreenShotPNG(_screenShotNames[_screenShotIndexForPreview]));
        }
    }

    if(_tempTexture != null)
    {
        GUI.DrawTexture(new Rect(xScreen,yScreen,   xScale/2,  yScale /2),_tempTexture);
    }
}


IEnumerator loadScreenShotPNG(string pngName)
{
    string imageFileURL;

    imageFileURL= "file://" + path + "/screenshots/" + pngName + ".png";

    imageFileURL = imageFileURL.Replace(" ", "%20"); 

    WWW _www = new WWW(imageFileURL);

    yield return _www;
    //the actual size of screenshot is 1024x768
    //I tryed various smaller sizes but it make no diffrence
    _tempTexture = new Texture2D(512, 512);

    _www.LoadImageIntoTexture(_tempTexture);
}

This works. The problem is that the app crashes after some next/back.

I think this is a memory problem because of the repeatedly allocation/deallocation of textures.

I want to know if exist a better way to do this.

Att.

2

Anyone knows some app made in Unity that have this feature? I haven’t found anything.

Att.