How to change Target Height in SpriteCollection's setting at Runtime

[agp12]

So I want to differentiate the target height in runtime, because if the game runs on Iphone 4 or 4GS, then the target height will be different than the target height I want on Iphone 5.
How can I change that in runtime?

[unikronsoftware]

You dont.
You simply change the orthographic size of your camera to compensate.
To make the camera pixel perfect again, use this:
      float pixelHeight = camera.pixelHeight;
      float newOrthoSize = pixelHeight / (float)initialCameraHeight * initialCameraOrthoSize;