kinglions/fastdraw

A Fast and Complete Swift Drawing Library

FastDraw

A Fast and Complete Swift Drawing(Handwriting) Library

Description

FastDraw is a high performance and highly extensible Drawing(Handwriting) Library that supports Apple Pencil.

Features

• pencil and highlighter, color and width selection
• eraser
• lasso
• export to sqlite, pdf, png

Here is a the demo of FastDraw

FastDrawDemo.mov

Getting Started

Add a basic DrawBoard

import UIKit
import FastDraw

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        let drawboardview = DrawBoardView(frame: CGRect(origin: CGPoint(x: 0, y: 100),
                                                    size: view.frame.size))
        drawboardview.setupDrawing()
        self.view.addSubview(drawboardview)
    }
}

Update Brush type and color anywhere you like

import UIKit
import FastDraw

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        let drawboardview = DrawBoardView(frame: CGRect(origin: CGPoint(x: 0, y: 100),
                                                    size: view.frame.size))
        drawboardview.setupDrawing()
        self.view.addSubview(drawboardview)
        Brush.shared.type = .pen
        Brush.shared.color = .red
        Brush.shared.width = 10
    }
}

Try out the FastDrawDemo

Try the app powered by FastDraw CoCreate.

Installation

CocoaPods

Create Podfile and add pod FastDraw:

use_frameworks!

target 'YourApp' do
    pod 'FastDraw'
end

Install pods:

pod install

Usage

Export to PDF/Image

// drawboardview is a view you have setup before

// export current drawing to URL
drawboardview.drawPDF(url: URL)
drawboardview.drawImage(url: URL)

// export current drawing to URL with background
// use these methods if you have provided a pdf as background of the UIView
drawboardview.drawPDF(pdfpage: CGPDFPage, url: URL)
drawboardview.drawImage(pdfpage: CGPDFPage, url: URL)

Help

Send me an email and I will answer your question and fix problem for you as soon as possible, or you can create an issue if you meet any problems

Contribution

Contribution is always welcomed! You can create an issue or pull request if you found a bug/implement a new feature/willing to improve the doc.

Roadmap

• Toolbox to set brush
• Stresstest function for FastDrawDemo
• Improve performance of drawing
• Documentation

Authors

Collin Zhang

License

MIT