SwiftyDraw

Overview

SwiftyDraw is a simple, lightweight drawing framework written in Swift. SwiftyDraw is built using Core Gaphics and is very easy to implement.

Requirements

• iOS 8.0+
• Swift 3.0

License

SwiftyDraw is available under the BSD license. See the LICENSE file for more info.

Installation

Cocoapods:

SwiftyDraw is available through CocoaPods. To install it, simply add the following line to your Podfile:

pod "SwiftyDraw"

Manual Installation:

Simply copy the contents of the Source folder into your project.

Usage

Using SwiftyDraw is very simple:

Getting Started:

Simply create a SwiftyDrawView and add it to your View Controller:

let drawView = SwiftyDrawView(frame: self.view.frame)
self.view.addSubview(drawView)

By default, the view will automatically respond to touch gestures and begin drawing. The default color is black.

To disable drawing, simply set the drawingEnabled property to false:

drawView.drawingEnabled = false

Customization

Line Color:

The color of a line stoke can be changed by adjusting the lineColor property. SwiftyDraw accepts any UIColor:

drawView.lineColor = UIColor.red

or

drawView.lineColor = UIColor(colorLiteralRed: 0.75, green: 0.50, blue: 0.88, alpha: 1.0)

Line Width:

The with of a line stroke can be changed by adjusting the lineWidth property. SwiftyDraw accepts any positive CGFloat:

drawView.lineWidth = CGFloat(5.0)

Line Opacity:

The opacity of a line stoke can be changed by adjusting the lineOpacity property. SwiftyDraw accepts a CGFloat between 0. and 1.0:

drawView.lineOpacity = CGFloat(0.5)

Editing

Remove Last Line:

SwiftyDraw has the option to clear the last line segment. Simply call the removeLastLine function:

drawView.removeLastLine()

This can be called several times, or until the canvas is clear.

Clear All:

If you wish to clear the entire canvas, simply call the clearCanvas function:

drawView.clearCanvas()

Delegate

SwiftyDraw has delegate functions to notify you when a user is interacting with a SwiftDrawView. To access these delegate methods, simply add your View Controller as the SwiftyDrawViewDelegate:

class ViewController: UIViewController, SwiftyDrawViewDelegate

There are four optional delegate methods:

func SwiftyDrawDidBeginDrawing(view: SwiftyDrawView) {

    // Called when the SwiftyDrawView detects touches have begun.
    
}
    
func SwiftyDrawIsDrawing(view: SwiftyDrawView) { 

	// Called when the SwiftyDrawView detects touches are currrently occuring. 
	// Will be called multiple times.
	
}
    
func SwiftyDrawDidFinishDrawing(view: SwiftyDrawView) {

	// Called when the SwiftyDrawView detects touches have ended for the particular line segment
	
}
    
func SwiftyDrawDidCancelDrawing(view: SwiftyDrawView) {

	// Called if SwiftyDrawView detects issues with the gesture recognizers and cancels the drawing
	
}

Contact

If you have any questions, requests, or enhancements, feel free to submit a pull request, create an issue, or contact me in person:

Andrew Walz andrewjwalz@gmail.com