iOS

Create a UIImage directly from an SVG within a bundle, Data or file URL:

import SwiftDraw
let image = UIImage(svgNamed: "sample.svg")

macOS

Create an NSImage directly from an SVG within a bundle, Data or file URL:

import SwiftDraw
let image = NSImage(svgNamed: "sample.svg")

SF Symbol

Custom SF Symbols can be created from a single SVG. SwiftDraw expands strokes, winds paths using the non-zero rule and aligns elements generating a symbol that can be imported directly into Xcode.

$ swiftdraw key.svg –format sfsymbol

Optional variants --ultralight and --black can also be provided:

$ swiftdraw key.svg –format sfsymbol –ultralight key-ultralight.svg –black key-black.svg

Alignment

By default, SwiftDraw automatically sizes and aligns the content to the template guides. The auto alignment insets are output by the tool:

$ swiftdraw simple.svg --format sfsymbol --insets auto
Alignment: --insets 30,30,30,30

Insets can be provided in the form --insets top,left,bottom,right specifying a Double or auto for each edge:

$ swiftdraw simple.svg --format sfsymbol --insets 40,auto,40,auto
Alignment: --insets 40,30,40,30

Variants can also be aligned using --ultralightInsets and --blackInsets.

Swift Code Generation

Swift source code can also be generated from an SVG using the tool:

$ swiftdraw simple.svg --format swift

<?xml version="1.0" encoding="utf-8"?>
<svg version="1.1" xmlns="http://www.w3.org/2000/svg" width="160" height="160">
  <rect width="160" height="160" fill="snow" />
  <path d="m 80 30 a 50 50 0 1 0 50 50 h -50 z" fill="pink" stroke="black" stroke-width="2"/>
</svg>

extension UIImage {
  static func svgSimple(size: CGSize = CGSize(width: 160.0, height: 160.0)) -> UIImage {
    let f = UIGraphicsImageRendererFormat.preferred()
    f.opaque = false
    let scale = CGSize(width: size.width / 160.0, height: size.height / 160.0)
    return UIGraphicsImageRenderer(size: size, format: f).image {
      drawSimple(in: $0.cgContext, scale: scale)
    }
  }

  private static func drawSimple(in ctx: CGContext, scale: CGSize) {
    ctx.scaleBy(x: scale.width, y: scale.height)
    let rgb = CGColorSpaceCreateDeviceRGB()
    let color1 = CGColor(colorSpace: rgb, components: [1, 0.98, 0.98, 1])!
    ctx.setFillColor(color1)
    ctx.fill(CGRect(x: 0, y: 0, width: 160, height: 160))
    let color2 = CGColor(colorSpace: rgb, components: [1, 0.753, 0.796, 1])!
    ctx.setFillColor(color2)
    let path = CGMutablePath()
    path.move(to: CGPoint(x: 80, y: 30))
    path.addCurve(to: CGPoint(x: 30, y: 80),
                   control1: CGPoint(x: 52.39, y: 30),
                   control2: CGPoint(x: 30, y: 52.39))
    path.addCurve(to: CGPoint(x: 80, y: 130),
                   control1: CGPoint(x: 30, y: 107.61),
                   control2: CGPoint(x: 52.39, y: 130))
    path.addCurve(to: CGPoint(x: 130, y: 80),
                   control1: CGPoint(x: 107.61, y: 130),
                   control2: CGPoint(x: 130, y: 107.61))
    path.addLine(to: CGPoint(x: 80, y: 80))
    path.closeSubpath()
    ctx.addPath(path)
    ctx.fillPath()
    ctx.setLineCap(.butt)
    ctx.setLineJoin(.miter)
    ctx.setLineWidth(2)
    ctx.setMiterLimit(4)
    let color3 = CGColor(colorSpace: rgb, components: [0, 0, 0, 1])!
    ctx.setStrokeColor(color3)
    ctx.addPath(path)
    ctx.strokePath()
  }
}

Source code can be generated using www.whileloop.com/swiftdraw.

Credits

SwiftDraw is primarily the work of Simon Whitty.

(Full list of contributors)