title: resize an UIImage and save it on my app file system
body: <p>I need to resize an UIImage and save it on my app file system,</p>
  
  <p>I can  <a href="http://vocaro.com/trevor/blog/2009/10/12/resize-a-uiimage-the-right-way/" rel="nofollow">resize the image</a> </p>
  
  <p>or just show it with a smaller cgrect for the frame,</p>
  
  <p>but how can i save this newly resized image on my app file sys?</p>
  
  <p>thanks!</p>