title: Convert hours form 12 hour time to 24 hour time Swift and save as an integer
body: <p>I want to convert my variable for hours which is an integer into a 24 hour time system (for example, if it is 01:05:13 PM, hours will be saved as 13, minutes will be saved as 5, and seconds will be saved as 13) so that I can use it for some math later in my code to fid some differences on a scheduling app I am working on. This is my first app and I couldn't find an answer to this anywhere else so thanks for your help! Another way this code could work is getting the amount in seconds since the day has begun, if anyone knows how to do that, it would be greatly appreciated!
  This is my function for getting the time and saving it as three different integers for hours, seconds, and minutes:</p>
  
  <pre><code>@IBAction func setTime() {
  
      var date = NSDate()
      //pickTimes()
      var calendar = NSCalendar.current
      calendar.timeZone = TimeZone(identifier: "UTC")!
      var currentHour = calendar.component(.hour, from: date as Date) + 5
      let currentMinutes = calendar.component(.minute, from: date as Date)
      let currentSeconds = calendar.component(.second, from: date as Date)
      timeText.text = ("\(currentHour):\(currentMinutes):\(currentSeconds)")
  }
  </code></pre>