title: iOS-Charts Reset offset in xAxis
body: <p>I am using iOS-Charts to show a bar chart.</p>
  
  <p><strong>I drag the chart to this position:</strong></p>
  
  <p><img src="https://i.stack.imgur.com/T8oxU.png" alt="Screen Shot"></p>
  
  <p><strong>Now I need to reset the position of xAxis by code like following:</strong></p>
  
  <p><img src="https://i.stack.imgur.com/uZYSY.png" alt="Screen Shot"></p>
  
  <p>But I didn't find an API to reset it. How can I reset xAxis by code?</p>