title: Button action is not working ios 10, swift 3, xcode 8.1
body: <p>I have Button in VC in storyboard and I am able to use outlet of it and it is working fine. when it comes to action, it is not working.</p>
  
  <p>find the images for reference. </p>
  
  <pre><code>@IBAction func actionStart(_ sender: Any) {
  
      if (isStarted == false)
      {
          isStarted = true
          if CLLocationManager.locationServicesEnabled()
          {
              self.tripTimer = Timer.scheduledTimer(timeInterval: 10.0, target: self, selector: #selector(LandingViewController.displayTripTimer), userInfo: nil, repeats: true)
              locationManager.startUpdatingLocation()
          }
      }
  }
  </code></pre>
  
  <p>View Hierarchy:</p>
  
  <p><a href="https://i.stack.imgur.com/tAdy9.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/tAdy9.png" alt="View Hierarchy"></a></p>
  
  <p>IBOutlet Connection: </p>
  
  <p><a href="https://i.stack.imgur.com/s9eve.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/s9eve.png" alt="IBOutlet Connections"></a></p>