Drawsana is a generalized framework for making freehand drawing views on iOS. You can let users scribble over images, add shapes and text, and even make your own tools.
Do you want to let your users mark up images? Are you writing a simple painting app? Drawsana might work for you!
Like what you see? Come work with us!
- Built-in tools
- Pen with line smoothing
- Eraser
- Ellipse, rect, line, arrow
- Selection
- Text
- Undo/redo
- Drawings are
Codable
, so you can save and load them - Extensible—make your own shapes and tools without forking the library
Add Asana/Drawsana
to your Cartfile and update your project like you would for any other
Carthage framework, or clone the source code and add the project to your workspace.
github "Asana/Drawsana" == 0.9.2
import Drawsana
class MyViewController: UIViewController {
let drawsanaView = DrawsanaView()
let penTool = PenTool()
func viewDidLoad() {
/* ... */
drawsanaView.set(tool: penTool)
drawsanaView.userSettings.strokeWidth = 5
drawsanaView.userSettings.strokeColor = .blue
drawsanaView.userSettings.fillColor = .yellow
drawsanaView.userSettings.fontSize = 24
drawsanaView.userSettings.fontName = "Marker Felt"
}
func save() {
let jsonEncoder = JSONEncoder()
jsonEncoder.outputFormatting = [.prettyPrinted, .sortedKeys]
let jsonData = try! jsonEncoder.encode(drawingView.drawing)
// store jsonData somewhere
}
func load() {
let data = // load data from somewhere
let jsonDecoder = JSONDecoder()
let drawing = try! jsonDecoder.decode(Drawing.self, from: jsonData)
drawsanaView.drawing = drawing
}
func showFinalImage() {
imageView.image = drawsanaView.render()
}
}
Drawsana does not currently have a way to automatically show an image under your drawing.
We recommend that, like in the example class, you add a UIImageView
underneath your
DrawsanaView
and make sure your DrawsanaView
's frame matches the image frame. When
it's time to get the final image, use DrawsanaView.render(over: myImage)
.
sudo gem install jazzy
make docs
open .docs/index.html
pip install ghp-import
make publish-docs
open https://asana.github.io/Drawsana
- Convert to Swift 4.2
- CocoaPods support
DrawsanaView.selectionIndicatorViewShapeLayer
is exposed, allowing you to more easily customize the appearance of the selection indicator- Changes to
DrawsanaView.selectionIndicatorView
's style are animated in fewer cases, which more closely matches user intent - Improved text tool use in the demo app
Initial release