iOS screenshot system out of memory error

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

Code (csharp):

1.  
2. Application.CaptureScreenshot("/screenshots/" + _screenShotName +".png");
3.  

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

Code (csharp):

1.  
2. private Texture2D _tempTexture;
3.  

and all screenshots are load in this texture.

this is the function:

Code (csharp):

1.  
2. private void drawThumbnail()
3.  
4. {
5.     if(GUI.Button(new Rect(118,408,29f/2,47/2),GUIManager.Instance.GetTexture("back"), GUIStyle.none))
6.     {
7.         if(_screenShotIndexForPreview > 0)
8.         {
9.             _screenShotIndexForPreview--;
10.  
11.             StartCoroutine (loadScreenShotPNG(_screenShotNames[_screenShotIndexForPreview]));
12.         }
13.     }
14.  
15.  
16.     if(GUI.Button(new Rect(320,408,29f/2,47/2),GUIManager.Instance.GetTexture("next"), GUIStyle.none))
17.     {
18.         //if is not the last image
19.         if(_screenShotIndexForPreview < _screenShotNames.Length - 2)
20.         {
21.             _screenShotIndexForPreview++;
22.  
23.             StartCoroutine (loadScreenShotPNG(_screenShotNames[_screenShotIndexForPreview]));
24.         }
25.     }
26.  
27.     if(_tempTexture != null)
28.     {
29.         GUI.DrawTexture(new Rect(xScreen,yScreen,   xScale/2,  yScale /2),_tempTexture);
30.     }
31. }
32.  
33.  
34. IEnumerator loadScreenShotPNG(string pngName)
35. {
36.     string imageFileURL;
37.  
38.     imageFileURL= "file://" + path + "/screenshots/" + pngName + ".png";
39.  
40.     imageFileURL = imageFileURL.Replace(" ", "%20");
41.  
42.     WWW _www = new WWW(imageFileURL);
43.  
44.     yield return _www;
45.     //the actual size of screenshot is 1024x768
46.     //I tryed various smaller sizes but it make no diffrence
47.     _tempTexture = new Texture2D(512, 512);
48.  
49.     _www.LoadImageIntoTexture(_tempTexture);
50. }
51.  

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.

 

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

Att.