Drawing a rectangle in UIView

Question

I am trying to draw a transparent rectangle in my UIView which has a black border.

My code however creates a completely black rectangle. Here\'s my code so far:

Answer 1

One handy tip ......

Very often, when you need to draw a square

it's easier to just draw a 'thick stripe' .....

    let context = UIGraphicsGetCurrentContext()
    context!.setLineWidth(100)
    context!.setStrokeColor(blah.cgColor)
    context?.move(to: CGPoint(x: 500, y: 200))
    context?.addLine(to: CGPoint(x: 500, y: 300))
    context!.strokePath()

That will draw a square, which runs downwards from 200 to 300.

It's centered on 500 across, and is 100 wide.