title: Texture Atlas Not Found with SpriteKit
body: <p>I am playing with Sprite Kit and trying to embed a texture atlas into the game. Everything works without problems when I test the game on "iPhone Retina (4-inch 64bit)" simulator. But when I switch to another simulator (Retina 3.5-inch and Retina 4-inch) the app crashes with the error "Texture Atlas Not Found". It seems like it has something to do with the device being 64bit but I don't have enough knowledge to make any comments.</p>
  
  <p>PS: I created the atlas with TexturePacker but tried this both with XCode atlases and TexturePacker atlases. Same results.</p>
  
  <p>Any ideas?</p>
  
  <p><strong>EDIT:</strong> I narrowed down the problem a bit. SKAction is the problem here. As soon as SpriteKit starts the animation I get the error above. If I comment the lines with the animation, I can see the textures on the screen, no problems there.</p>
  
  <pre><code>    for (int i = 0; i &lt; 20; i++) {
      SKTexture *tex = [SKTexture textureWithImageNamed:[NSString stringWithFormat:@"creature-1/explode/%03d", i]];
      [textures addObject:tex];
  }
  
  SKAction *critAnim = [SKAction animateWithTextures:textures timePerFrame:0.3];
  [critSprite runAction:critAnim completion:^{
      [critSprite removeFromParent];
  }];
  [self addChild:critSprite];
  </code></pre>