title: Rotate UIImage in swift
body: <p>I want to rotate UIImage in clockwise direction. But my current code do not perform function accurate some time it rotate and some time its skip rotation. I want my UIImage will continuously rotate clockwise on my action button.
  Here is my current code:</p>
  
  <pre><code>imageView.image = imageView.image!.imageRotatedByDegrees(angle, flip: false)
  angle = angle + 90
  if angle &gt; 360{
      angle = 0
  }
  </code></pre>