Change color of UISwitch in “off” state

Question

I\'ve learned that we can change the UISwitch button appearance in its \"on\" state, but is it also possible to change the color of the UISwitch in the \"off\" state?

Answer 1

Here's a pretty good trick: you can just reach right into the UISwitch's subview that draws its "off" background, and change its background color. This works a lot better in iOS 13 than it does in iOS 12:

if #available(iOS 13.0, *) {
    self.sw.subviews.first?.subviews.first?.backgroundColor = .green
} else if #available(iOS 12.0, *) {
    self.sw.subviews.first?.subviews.first?.subviews.first?.backgroundColor = .green
}