onmyway133/RoughSwift

RoughSwift

Create sketchy, hand-drawn styled graphics in iOS apps using Rough.js via JavaScriptCore.

Features

• Hand-drawn, sketchy style shapes in SwiftUI and UIKit
• Supports line, rectangle, circle, ellipse, linear path, arc, curve, polygon, SVG path
• Generates UIBezierPath for CAShapeLayer
• Multiple fill styles: hachure, solid, zigzag, crossHatch, dots, dashed
• Easy customizations with Options
• Composable and immutable APIs

Requirements

• iOS 16+
• Swift 6
• Xcode 16+

Installation

Swift Package Manager

Add to your Package.swift:

dependencies: [
    .package(url: "https://github.com/onmyway133/RoughSwift", from: "3.0.0")
]

Or via Xcode: File → Add Package Dependencies.

SwiftUI Usage

Basic shape

RoughView()
    .fill(.yellow)
    .fillStyle(.hachure)
    .hachureAngle(-41)
    .hachureGap(-1)
    .stroke(.systemTeal)
    .strokeWidth(2)
    .rectangle()
    .frame(width: 200, height: 100)

Fill styles

struct StylesView: View {
    var body: some View {
        LazyVGrid(columns: [.init(), .init(), .init()], spacing: 12) {
            RoughView().fill(.red).fillStyle(.crossHatch).circle().frame(width: 100, height: 100)
            RoughView().fill(.green).fillStyle(.dashed).circle().frame(width: 100, height: 100)
            RoughView().fill(.purple).fillStyle(.dots).circle().frame(width: 100, height: 100)
            RoughView().fill(.cyan).fillStyle(.hachure).circle().frame(width: 100, height: 100)
            RoughView().fill(.orange).fillStyle(.solid).circle().frame(width: 100, height: 100)
            RoughView().fill(.gray).fillStyle(.starBurst).circle().frame(width: 100, height: 100)
            RoughView().fill(.yellow).fillStyle(.zigzag).circle().frame(width: 100, height: 100)
            RoughView().fill(.systemTeal).fillStyle(.zigzagLine).circle().frame(width: 100, height: 100)
        }
    }
}

Available fill styles: crossHatch, dashed, dots, hachure, solid, starBurst, zigzag, zigzagLine

SVG path

struct SVGView: View {
    let apple = "M85 32C115 68 239 170 281 192 311 126 274 43 244 0c97 58 146 167 121 254 28 28 40 89 29 108 -25-45-67-39-93-24C176 409 24 296 0 233c68 56 170 65 226 27C165 217 56 89 36 54c42 38 116 96 161 122C159 137 108 72 85 32z"

    var body: some View {
        RoughView()
            .stroke(.systemTeal)
            .fill(.red)
            .draw(Path(d: apple))
            .frame(width: 300, height: 300)
    }
}

Chart example

struct ChartView: View {
    let heights: [CGFloat] = (0..<10).map { _ in CGFloat.random(in: 0..<150) }

    var body: some View {
        HStack {
            ForEach(0..<10, id: \.self) { index in
                VStack {
                    Spacer()
                    RoughView()
                        .fill(.yellow)
                        .rectangle()
                        .frame(height: heights[index])
                }
            }
        }
        .padding()
    }
}

UIKit Usage

For direct CALayer-based rendering:

let layer = CALayer()
let size = CGSize(width: 200, height: 200)

let renderer = Renderer(layer: layer)
let generator = Engine.shared.generator(size: size)

let drawing = generator.generate(drawable: Rectangle(x: 10, y: 10, width: 100, height: 50))
renderer.render(drawing: drawing)

Options

Options is an immutable struct for per-shape customization:

var options = Options()
options.roughness = 2.0
options.strokeWidth = 3
options.fill = .blue
options.stroke = .black
options.fillStyle = .hachure
options.hachureAngle = 60
options.hachureGap = 8

let drawing = generator.generate(drawable: Circle(x: 100, y: 100, diameter: 150), options: options)

Credit

• rough — the generator that powers RoughSwift via JavaScriptCore
• SVGPath — constructing UIBezierPath from SVG path

License

RoughSwift is available under the MIT license. Copyright (c) 2019-2026 Khoa Pham.