title: How can I disable scaling of my sub calayer when resize it?
body: <p>I have a sub CALayer with a image on it which is always changing size but I don't want to scale its content(the image) to fit the layer size. Instead, what I want is always keep the image size unchanged so that the image will be appeared bit by bit.</p>
  
  <p>Is anyway to implement this effect?</p>
  
  <p>Thanks</p>