title: CGRectMake, CGPointMake, CGSizeMake, CGRectZero, CGPointZero is unavailable in Swift
body: <p>After converting code to latest swift 3.0 I am shown this error.</p>
  
  <p><a href="https://i.stack.imgur.com/yvqDR.png"><img src="https://i.stack.imgur.com/yvqDR.png" alt="enter image description here"></a><a href="https://i.stack.imgur.com/IsyeI.png"><img src="https://i.stack.imgur.com/IsyeI.png" alt="enter image description here"></a></p>
  
  <p>Also tell me solution for <code>CGSize = CGSizeMake(0,0)</code> </p>
  
  <pre><code>static var frameAtStartOfPan: CGRect = CGRectZero
  static var startPointOfPan: CGPoint = CGPointZero
  </code></pre>
  
  <p>Which is also unavailable.</p>