title: How to set x-axis labels with ios charts
body: <p>I've recently started using the ios charts library and am having trouble finding information on how to manipulate the x-axis with the swift3 update.</p>
  
  <p>What I want to do is label the x-axis with time values, e.g. 2:03:00, 2:03:01, 2:03:02, etc. In the tutorials I find online, this seems to be very easy; many of them use months of the year as the x-axis label. </p>
  
  <p>However, in the swift3 update, charts now initializes values with x and y values, and I am not sure how to use labels in this version of the library. Does anyone know how to create labels in charts with swift3? </p>