Converting UIColor to CGColor in swift
// Original answer.
var newColor = UIColor.lightGrayColor().CGColor
// Swift 3 version
var newColor = UIColor.lightGray.cgColor
Oddly enough, as Swift has evolved to 3.0 the answer has evolved as well. I ran across this while converting some Objective C code to Swift. I hope this helps someone! :-) Here is what it is today:
context.setStrokeColor(UIColor.lightGray.cgColor)
And it's funny, this "light gray" answer is actually helping me debug some code too! Thank iou!
Swift 4+ version
UIColor.lightGray.cgColor