Top Highlights

• The view’s frame is therefore superfluous! In fact, the frame property is merely a convenient expression of the center and bounds values. In most cases, this won’t matter to you; you’ll use the frame property anyway.
• You can detect this situation in the Simulator by checking Debug → Color Misaligned Images. A simple solution is to set the view’s frame, after positioning it, to the CGRectIntegral of its frame, or (in Swift) to call integerize on the view’s frame.