How do I create a circle with CALayer?

calayer, swift

Solution

Change radius and fillColor as you want. :)

import Foundation
import UIKit

class CircleLayerView: UIView {
    var circleLayer: CAShapeLayer!

    override func draw(_ rect: CGRect) {
        super.draw(rect)
        if circleLayer == nil {
            circleLayer = CAShapeLayer()
            let radius: CGFloat = 150.0
            circleLayer.path = UIBezierPath(roundedRect: CGRect(x: 0, y: 0, width: 2.0 * radius, height: 2.0 * radius), cornerRadius: radius).cgPath
            circleLayer.position = CGPoint(x: self.frame.midX - radius, y: self.frame.midY - radius)
            circleLayer.fillColor = UIColor.blue.cgColor
            self.layer.addSublayer(circleLayer)
        }
    }
}

Problem

I have the code below tested, but when I give it constraints it becomes a little small circle: ``` override func drawRect(rect: CGRect) { var path = UIBezierPath(ovalInRect: rect) fillColor.setFill() path.fill() //set up the width and height variables //for the horizontal stroke let plusHeight:CGFloat = 300.0 let plusWidth:CGFloat = 450.0 //create the path var plusPath = UIBezierPath() //set the path's line width to the height of the stroke plusPath.lineWidth = plusHeight //move the initial point of the path //to the start of the horizontal stroke plusPath.moveToPoint(CGPoint( x:self.bounds.width/2 - plusWidth/2 + 0.5, y:self.bounds.height/2 + 0.5)) //add a point to the path at the end of the stroke plusPath.addLineToPoint(CGPoint( x:self.bounds.width/2 + plusWidth/2 + 0.5, y:self.bounds.height/2 + 0.5)) } ```

Original source

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