A circular progress view. Essentially it is a circle broken up into segments much like the loading indicator on watchOS when installing and update. It's also IBDesignable to make your life easier.

SegmentedCircularProgressView.swift

//
//  SegmentedCircularProgressView.swift
//
//  Created by Matthew Cheetham on 18/06/2018.
//

import UIKit

@IBDesignable
/// A circular progress view broken out into individual segments. You can highlight individual segments to indicate progress in a clockwise fashion
class SegmentedCircularProgressView: UIView {
    
    /// The number of segments to break the circle in to
    @IBInspectable var totalSegments: Int = 8
    /// The number of segments that should be highlighted the activeColour. To indicate progress
    @IBInspectable var activeSegments: Int = 1
    /// The colour to use the for the active segments
    @IBInspectable var activeColour: UIColor = UIColor.white
    /// The colour to use for the inactive segments
    @IBInspectable var inactiveColour: UIColor = UIColor.white.withAlphaComponent(0.5)
    /// The size of the gaps between the segments
    @IBInspectable var gapSize: CGFloat = 0.004
    /// The thickness of the line the makes up the circle
    @IBInspectable var lineWidth: CGFloat = 10
    
    override func draw(_ rect: CGRect) {
        
        let circlePath = UIBezierPath(arcCenter: CGPoint(x: rect.width/2, y: rect.height/2), radius: (rect.width - lineWidth)/2, startAngle: -CGFloat.pi/2, endAngle: (3*CGFloat.pi)/2, clockwise: true)
        let segmentAngle: CGFloat = (360 / CGFloat(totalSegments)) / 360
        
        for i in 0 ... totalSegments-1 {
            let circleLayer = CAShapeLayer()
            circleLayer.path = circlePath.cgPath
            
            circleLayer.strokeStart = segmentAngle * CGFloat(i)
            
            circleLayer.strokeEnd = circleLayer.strokeStart + segmentAngle - gapSize
            
            circleLayer.lineWidth = lineWidth
            if i <= activeSegments-1 {
                circleLayer.strokeColor = activeColour.cgColor
            } else {
                circleLayer.strokeColor = inactiveColour.cgColor
            }
            
            circleLayer.fillColor = UIColor.clear.cgColor
            
            layer.addSublayer(circleLayer)
        }
    }
}