title: How to use the .frame property in iOS?
body: <p>I am calling a custom picker in my application when i hit a button.</p>
  
  <p>The picker looks like a bubble so i am pointing it to the button like this :</p>
  
  <pre><code>thePicker.presentFromRect = button.frame;
  </code></pre>
  
  <p>I need the picker to show 300 pixels down from this button. How can i do that?</p>
  
  <p>How can i add 300 pixels height on the above statement ?</p>