title: Suppressing deprecated warnings in Xcode
body: <p>With all the SDKs floating around, it's handy to be able to build for multiple SDKs and platforms. However, bouncing from 3.2 to 3.0 and even occasionally 2.x, I frequently get deprecated warnings involving methods that have changed or been superseded:</p>
  
  <pre><code>warning: 'UIKeyboardBoundsUserInfoKey' is deprecated.
  </code></pre>
  
  <p>Since I still want to maintain compatibility with older OSes, and I'm also striving to remove 'noise' when building, is there a way to turn off or disable these warnings?</p>