PaintCode UIButton Image Example

TotemPaintCodeKit.swift

import UIKit

public class TotemPaintCodeKit : NSObject {

    //// Cache

    private struct Cache {
        static var imageOfSmileFace: UIImage?
        static var smileFaceTargets: [AnyObject]?
    }

    //// Drawing Methods

    public class func drawSmileFace() {

        //// Bezier 3 Drawing
        var bezier3Path = UIBezierPath()
        bezier3Path.moveToPoint(CGPointMake(43.5, 20))
        bezier3Path.addCurveToPoint(CGPointMake(38.55, 22.28), controlPoint1: CGPointMake(41.52, 20), controlPoint2: CGPointMake(39.74, 20.89))
        bezier3Path.addCurveToPoint(CGPointMake(37, 26.5), controlPoint1: CGPointMake(37.58, 23.42), controlPoint2: CGPointMake(37, 24.89))
        bezier3Path.addCurveToPoint(CGPointMake(43.5, 33), controlPoint1: CGPointMake(37, 30.09), controlPoint2: CGPointMake(39.91, 33))
        bezier3Path.addCurveToPoint(CGPointMake(50, 26.5), controlPoint1: CGPointMake(47.09, 33), controlPoint2: CGPointMake(50, 30.09))
        bezier3Path.addCurveToPoint(CGPointMake(43.5, 20), controlPoint1: CGPointMake(50, 22.91), controlPoint2: CGPointMake(47.09, 20))
        bezier3Path.closePath()
        bezier3Path.moveToPoint(CGPointMake(25.5, 20))
        bezier3Path.addCurveToPoint(CGPointMake(20.94, 21.87), controlPoint1: CGPointMake(23.72, 20), controlPoint2: CGPointMake(22.11, 20.71))
        bezier3Path.addCurveToPoint(CGPointMake(19, 26.5), controlPoint1: CGPointMake(19.74, 23.05), controlPoint2: CGPointMake(19, 24.69))
        bezier3Path.addCurveToPoint(CGPointMake(25.5, 33), controlPoint1: CGPointMake(19, 30.09), controlPoint2: CGPointMake(21.91, 33))
        bezier3Path.addCurveToPoint(CGPointMake(32, 26.5), controlPoint1: CGPointMake(29.09, 33), controlPoint2: CGPointMake(32, 30.09))
        bezier3Path.addCurveToPoint(CGPointMake(25.5, 20), controlPoint1: CGPointMake(32, 22.91), controlPoint2: CGPointMake(29.09, 20))
        bezier3Path.closePath()
        bezier3Path.moveToPoint(CGPointMake(63, 33.5))
        bezier3Path.addCurveToPoint(CGPointMake(34.5, 62), controlPoint1: CGPointMake(63, 49.24), controlPoint2: CGPointMake(50.24, 62))
        bezier3Path.addCurveToPoint(CGPointMake(6, 33.5), controlPoint1: CGPointMake(18.76, 62), controlPoint2: CGPointMake(6, 49.24))
        bezier3Path.addCurveToPoint(CGPointMake(12.45, 15.45), controlPoint1: CGPointMake(6, 26.65), controlPoint2: CGPointMake(8.42, 20.36))
        bezier3Path.addCurveToPoint(CGPointMake(12.8, 15.03), controlPoint1: CGPointMake(12.56, 15.31), controlPoint2: CGPointMake(12.68, 15.17))
        bezier3Path.addCurveToPoint(CGPointMake(34.5, 5), controlPoint1: CGPointMake(18.02, 8.89), controlPoint2: CGPointMake(25.81, 5))
        bezier3Path.addCurveToPoint(CGPointMake(63, 33.5), controlPoint1: CGPointMake(50.24, 5), controlPoint2: CGPointMake(63, 17.76))
        bezier3Path.closePath()
        bezier3Path.moveToPoint(CGPointMake(15.5, 44.5))
        bezier3Path.addCurveToPoint(CGPointMake(54.5, 44.5), controlPoint1: CGPointMake(15.5, 44.5), controlPoint2: CGPointMake(34.5, 59.5))
        UIColor.blueColor().setFill()
        bezier3Path.fill()
    }

    //// Generated Images

    public class var imageOfSmileFace: UIImage {
        if Cache.imageOfSmileFace != nil {
            return Cache.imageOfSmileFace!
        }

        UIGraphicsBeginImageContextWithOptions(CGSizeMake(68, 69), false, 0)
            TotemPaintCodeKit.drawSmileFace()

        Cache.imageOfSmileFace = UIGraphicsGetImageFromCurrentImageContext()!.imageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal)
        UIGraphicsEndImageContext()

        return Cache.imageOfSmileFace!
    }

    //// Customization Infrastructure

    @IBOutlet var smileFaceTargets: [AnyObject]! {
        get { return Cache.smileFaceTargets }
        set {
            Cache.smileFaceTargets = newValue
            for target: AnyObject in newValue {
                target.setImage(TotemPaintCodeKit.imageOfSmileFace)
            }
        }
    }

}

@objc protocol StyleKitSettableImage {
    func setImage(image: UIImage!)
}

@objc protocol StyleKitSettableSelectedImage {
    func setSelectedImage(image: UIImage!)
}

ViewController.swift

import UIKit


class ViewController: UIViewController {

    @IBOutlet weak var button1: UIButton!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        button1.setImage(TotemPaintCodeKit.imageOfSmileFace, forState: UIControlState.Normal)
    }
    
    

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}