ATP T-shirt in Swift

ATPView.swift

// adadpted from http://atp.fm/t-shirt

import UIKit

class ATPView : UIView {

    override func drawRect(rect: CGRect) {
        let fontName = "MyriadPro-SemiBold"
        let title = NSLocalizedString("Accidental Tech Podcast", comment: "title")
        let initials = NSLocalizedString("ATP", comment: "initials")
        let rect = CGRect(origin: CGPointZero, size: bounds.size)
        let w = rect.width
        let offsetY = w * -0.07
        
        var ringRect = CGRectInset(rect, w * 0.08, w * 0.08)
        ringRect.origin.y += offsetY
        let ring = UIBezierPath(ovalInRect: ringRect)
        ring.lineWidth = ceil(w * 0.012)
        UIColor(white: 0.3, alpha: 1.0).setStroke()
        ring.stroke()
        
        var innerRingRect = CGRectInset(rect, w * 0.21, w * 0.21)
        innerRingRect.origin.y += offsetY
        let inner = UIBezierPath(ovalInRect: innerRingRect)
        inner.lineWidth = ceil(w * 0.007)
        UIColor(white: 0.7, alpha: 1.0).setStroke()
        inner.stroke()
        
        let pStyle = NSMutableParagraphStyle()
        pStyle.alignment = .Center
        let titleAttributes = [
            NSFontAttributeName: UIFont(name: fontName, size: w * 0.068)!,
            NSParagraphStyleAttributeName: pStyle,
            NSForegroundColorAttributeName: UIColor.whiteColor(),
            NSKernAttributeName: w * 0.0037
        ]
        let t = title.uppercaseString
        let titleRect = CGRectMake(0, w * 0.91, w, w * 0.09)
        t.drawWithRect(titleRect, options: .UsesLineFragmentOrigin, attributes: titleAttributes, context: nil)
        
        let bs = CGSize(width: w * 0.44, height: w * 0.19)
        let bOrigin = CGPoint(x: (w - bs.width) / 2, y: (w - bs.height) / 2 + offsetY)
        let b = CGRect(origin: bOrigin, size: bs)
        
        let (cX, cY) = (CGRectGetMidX(b), CGRectGetMidY(b))
        var transform = CGAffineTransformMakeTranslation(cX, cY)
        transform = CGAffineTransformRotate(transform, 0.5236)
        transform = CGAffineTransformTranslate(transform, -cX, -cY)
        CGContextConcatCTM(UIGraphicsGetCurrentContext(), transform)
        UIColor(red: 0.12, green: 0.25, blue: 0.4, alpha: 1.0).setFill()
        UIBezierPath(roundedRect: b, cornerRadius: bs.height * 0.15).fill()
        
        var a = titleAttributes
        a[NSFontAttributeName] = UIFont(name: fontName, size: bs.height * 0.84)!
        a[NSKernAttributeName] = bs.height * 0.04
        let r = CGRectInset(b, 0, bs.height * 0.17)
        initials.drawWithRect(r, options: .UsesLineFragmentOrigin, attributes: a, context: nil)
    }
    
}