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hsjunnesson/gist:9e07291b7ccd35cea269

Created September 16, 2014 17:03
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  1. hsjunnesson created this gist Sep 16, 2014.
    71 changes: 71 additions & 0 deletions gistfile1.swift
    View file
    Original file line number Diff line number Diff line change
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    // Playground - noun: a place where people can play

    import UIKit
    import QuartzCore


    @IBDesignable
    public class CirclePhotoView: UIView {

    @IBInspectable public var image: UIImage?

    lazy var circleLayer: CAShapeLayer = CAShapeLayer()
    lazy var imageLayer: CALayer = CALayer()

    override public func layoutSubviews() {
    super.layoutSubviews()

    // Add to super layer if not present

    if circleLayer.superlayer == nil {
    layer.addSublayer(circleLayer)
    }

    if imageLayer.superlayer == nil {
    layer.insertSublayer(imageLayer, above: circleLayer)
    }

    // Update circle
    circleLayer.path = CGPathCreateWithEllipseInRect(bounds, nil)
    circleLayer.fillColor = UIColor.lightGrayColor().CGColor

    // Update image
    let inset = CGRectInset(bounds, 5, 5)
    imageLayer.frame = inset

    if let image = self.image {
    let maskedImage = maskImage(image, size: bounds.size)
    imageLayer.contents = maskedImage.CGImage
    imageLayer.backgroundColor = UIColor.clearColor().CGColor
    } else {
    imageLayer.contents = nil
    imageLayer.backgroundColor = UIColor.whiteColor().CGColor
    }
    }

    // Mask an image in a circle
    func maskImage(image: UIImage, size: CGSize) -> UIImage {
    UIGraphicsBeginImageContext(size)
    let context = UIGraphicsGetCurrentContext()
    let rect = CGRectMake(0, 0, size.width, size.height)

    let path = CGPathCreateWithEllipseInRect(rect, nil)
    CGContextAddPath(context, path)
    CGContextClip(context)

    image.drawInRect(rect)

    let maskedImage = UIGraphicsGetImageFromCurrentImageContext()
    UIGraphicsEndImageContext()

    return maskedImage
    }
    }


    let view = CirclePhotoView(frame: CGRectMake(0, 0, 100, 100))

    view.image = UIImage(named: "avatar.jpg")
    view.setNeedsLayout()

    view