How to change the color of a UIBezierPath in Swift?

Question

I have an instance of UIBezierPath and I want to change the color of the stroke to something other than black. Does anyone know how to do this in Swift?

Answer 1

With Swift 5, UIColor has a setStroke() method. setStroke() has the following declaration:

func setStroke()

Sets the color of subsequent stroke operations to the color that the receiver represents.

Therefore, you can use setStroke() like this:

strokeColor.setStroke() // where strokeColor is a `UIColor` instance

---

The Playground code below shows how to use setStroke() alongside UIBezierPath in order to draw a circle with a green fill color and a light grey stroke color inside a UIView subclass:

import UIKit
import PlaygroundSupport

class MyView: UIView {

    override func draw(_ rect: CGRect) {
        // UIBezierPath
        let newRect = CGRect(
            x: bounds.minX + ((bounds.width - 79) * 0.5 + 0.5).rounded(.down),
            y: bounds.minY + ((bounds.height - 79) * 0.5 + 0.5).rounded(.down),
            width: 79,
            height: 79
        )
        let ovalPath = UIBezierPath(ovalIn: newRect)

        // Fill
        UIColor.green.setFill()
        ovalPath.fill()

        // Stroke
        UIColor.lightGray.setStroke()
        ovalPath.lineWidth = 5
        ovalPath.stroke()
    }

}

let myView = MyView(frame: CGRect(x: 0, y: 0, width: 200, height: 300))
PlaygroundPage.current.liveView = myView