Track On Fill colour not working correctly.

[NSRover]

I have created a PWSwitch like so:

let customSwitch = PWSwitch(frame: CGRect(x: 0, y: 0, width: 36, height: 20))
customSwitch.borderWidth = 0
customSwitch.trackOnFillColor = .red
customSwitch.trackOffFillColor = .green

The red colour is only visible briefly during the transition and is replaced by a mustard yellow when the switch is On.

[NSRover]

I could achieve the desired result by also setting

customSwitch.trackOnBorderColor = .red

However, since the border width is set to 0 this should not have been necessary.

[Shaninnik]

Track/border color logic is a bit tricky because of on/off animation - border completely fills in entire track and acts like background color, so sometimes you need to experiment with values to achieve desired effect.

Also there is no borderWidth property for PWSwitch