DrawableView

A UIView subclass that allows the user to draw on it.

Add a DrawableView to your app and you will immediately be able to draw on it. Then try changing the stroke color, width, and transparency!

Features

• Stroke Color
• Stroke Width
• Stroke Transparency
• Undo
• DrawableViewDelegate
• Quad Curve Interpolation

Requirements

• iOS 9.0+
• Xcode 8.3.1

Installation

CocoaPods

You can use CocoaPods to install DrawableView by adding it to your Podfile:

pod 'DrawableView'

Simply import DrawableView wherever you would like to use it.

import UIKit
import DrawableView

Carthage

Create a Cartfile that lists the framework and run carthage update. Follow the instructions to add $(SRCROOT)/Carthage/Build/iOS/DrawableView.framework to an iOS project.

github "EthanSchatzline/DrawableView"

Usage example

class ViewController: UIViewController, DrawableViewDelegate {

    @IBOutlet var drawableView: DrawableView! {
      didSet {
        drawableView.delegate = self
        drawableView.strokeColor = .blue
        drawableView.strokeWidth = 12.0
        drawableView.transparency = 1.0
      }
    }

    func setDrawing(_ isDrawing: Bool) {
        /*
        Run some logic based on if the user is currently drawing a stroke or not.
        Commonly people hide the drawing tools UI while the user is drawing and fade it back in once they stop.
        */
    }

    func saveDrawingToPhotoLibrary() {
      guard let drawnImage = drawableView.image else { return }
      UIImageWriteToSavedPhotosAlbum(drawnImage, self, nil, nil)
    }
}

Contribute

We would love for you to contribute to DrawableView, check the LICENSE file for more info.

Meta

Ethan Schatzline – @_Easy_E – ethanschatzline@gmail.com

Distributed under the MIT license. See LICENSE for more information.

https://github.com/EthansShatzline/