title: Detecting clicks on a button in Swift
body: <p>How can I detect clicks on the following <code>UIKit</code> element in Swift, in an Xcode 6 playground?</p>
  
  <pre><code>let testLabel = UILabel(frame: CGRectMake(0, 0, 120, 40))
  testLabel.text = "My Button"
  </code></pre>