title: Swift 4 Get current timeInterval of Scheduled Timer
body: <p>I'm using scheduled timer for my application like: </p>
  
  <pre><code>contentTimer = Timer.scheduledTimer(timeInterval: 30, target: self, selector: #selector(HandleSendContentTime), userInfo: nil, repeats: true)
  </code></pre>
  
  <p>It's working well but I also wanted to get current timeInterval when viewDisappearing </p>
  
  <pre><code>override func viewWillDisappear(_ animated: Bool) {
      //do something here with time interval
  
      contentTimer.invalidate()
  }
  </code></pre>
  
  <p>Is there any way to get current timeInterval value before invalidate it.</p>