This project includes IBDesignables to play around with corner radii of the resize handles in PanelKit.
The objective was to find a corner radius for the handle that visually matches the rounded rect (panel) at a certain distance.
Main.storyboard has a CornerHandleView and a RoundedView that provides the following outcome:
The draw properties are IBInspectables, so they can be edited from the storyboard to try out different results. The color of the IBDesignables is the view's tint color.
This is a quick test project made specifically for PanelKit's resize feature, though I'm sure this might be useful for other projects.