PocketSVG

A simple toolkit for displaying and manipulating SVGs on iOS and macOS in a performant manner.

The goal of this project is not to be a fully compliant SVG parser/renderer. But rather to use SVG as a format for serializing CG/UIPaths, meaning it only supports SVG features that can be represented by CG/UIPaths.

Thoroughly documented.

Features

Support for SVG elements: path, line, polyline, polygon, rect, circle, ellipse
Support for SVG named colors.
Fully working iOS and macOS demos.
Straightforward API for typical SVG rendering as a UIImageView/NSImageView or CALayer subclass.
Access every shape within your SVG as a CGPath for more fine-grained manipulation.

Installation

Swift Package Manager

dependencies: [
    .package(url: "https://github.com/pocketsvg/PocketSVG.git", .upToNextMajor(from: "2.6.0"))
]

Cocoapods

Add this to your Podfile:

pod 'PocketSVG', '~> 2.6'

Then run pod install

Carthage

Add this to your Cartfile:

github "pocketsvg/PocketSVG" ~> 2.6

Then run carthage update

Usage

Render an SVG file using `SVGImageView`

let url = Bundle.main.url(forResource: "tiger", withExtension: "svg")!
let svgImageView = SVGImageView.init(contentsOf: url)
svgImageView.frame = view.bounds
svgImageView.contentMode = .scaleAspectFit
view.addSubview(svgImageView)

Output

Note: By default, SVGLayer has shouldRasterize set to YES when running on iOS. If you need to animate changes to the layer's transform you might want to reset that to NO.

Manually render each path of an SVG file using `CAShapeLayer`

view.backgroundColor = .white

let svgURL = Bundle.main.url(forResource: "tiger", withExtension: "svg")!
let paths = SVGBezierPath.pathsFromSVG(at: svgURL)
let tigerLayer = CALayer()
for (index, path) in paths.enumerated() {
    let shapeLayer = CAShapeLayer()
    shapeLayer.path = path.cgPath
    if index%2 == 0 {
        shapeLayer.fillColor = UIColor.black.cgColor
    }
    else if index%3 == 0 {
        shapeLayer.fillColor = UIColor.darkGray.cgColor
    }
    else {
        shapeLayer.fillColor = UIColor.gray.cgColor
    }
    tigerLayer.addSublayer(shapeLayer)
}

var transform = CATransform3DMakeScale(0.4, 0.4, 1.0)
transform = CATransform3DTranslate(transform, 200, 400, 0)
tigerLayer.transform = transform
view.layer.addSublayer(tigerLayer)