How to set the text of a PiePlainTextLayer

[zas9vf]

hey guys

I'm trying to add labels to my pie slices using chartView.layers = [PiePlainTextLayer(), PieLineTextLayer(), PieLineTextLayer()], however I'm not sure how to set the text for each layer for my corresponding three slices. These are the only properties I see for a PiePlainTextLayer:

Any thoughts?

Thanks

[zas9vf]

...also, how do I clear out a chart's layers so I can redraw the chart with new layers with new values? I tried chartView.layers.removeAll() after redrawing the chart with updated values but it didn't remove the old value labels