title: Core Animation Off-Screen to Onscreen Animation
body: <p>In the app I'm making, I'm trying to make a button start offscreen and move onscreen. I'm not sure how to start with the button offscreen, but I know that once I figure that out, I can do something like the code below:</p>
  
  <pre><code>[UIView beginAnimation:@"animate" context: nil];
  [UIView setAnimationDuration:3];
  self.myButton.frame = CGRectMake (20, 100, 40, 80);
  //Other animations
  [UIView commitAnimations];
  </code></pre>
  
  <p>Additionally, in the line <code>[UIView beginAnimation:@"animate" context:nil];</code>, is the context parameter asking for a CGContextRef?</p>