/InkKit

Drawing and Geometry made easy on iOS - now in Swift 3.0

Primary LanguageSwiftMIT LicenseMIT

InkKit

Version License Language Platform

Swift Support

Swift 4.0

InkKit is Swift 4.0 by default, so to use that just include InkKit in your podfile:

pod 'InkKit'

Swift 3.2

In order to use InkKit in a Swift 3.2/3.0 project, ensure you point to the 2.1.0 tag.

pod 'InkKit', '2.1.0'

Swift 2.3

In order to use InkKit in a Swift 2.3 project, ensure you point to the swift2.3 branch.

pod 'InkKit', :git => 'https://github.com/shaps80/InkKit/', :branch => 'swift2.3'

Swift 2.2

If you still require Swift 2.2, point your version as such: pod 'InkKit', '1.3.1'

Example Code

Everything you see here, was code-drawn with InkKit! In fact, other than some CGRect instances, this is ALL the code required to draw the image you see on the right ;)

Drawing made simple! InkKit In Action
Lets draw the screen on the right. 
Draw.fillRect(bgFrame, color: UIColor(hex: "1c3d64"))
let grid = Grid(colCount: 6, rowCount: 9, bounds: gridFrame)
let path = grid.path(includeComponents: [.Columns, .Rows])

Draw.strokePath(path, startColor: UIColor(white: 1, alpha: 0.15),
endColor: UIColor(white: 1, alpha: 0.05), angleInDegrees: 90)


let rect = grid.boundsForRange(sourceColumn: 1, sourceRow: 1,
destinationColumn: 4, destinationRow: 6)


drawCell(rect, title: "4x6",
includeBorder: true, includeShadow: true)


Draw.addShadow(.Outer, path: UIBezierPath(rect: barFrame),
color: UIColor(white: 0, alpha: 0.4), radius: 5,
offset: CGSize(width: 0, height: 1))


Draw.fillRect(barFrame, color: UIColor(hex: "ff0083"))


let (_, navFrame) = barFrame.divide(20, fromEdge: .MinYEdge)
"InkKit".drawAlignedTo(navFrame, attributes: [
NSForegroundColorAttributeName: Color.whiteColor(),
NSFontAttributeName: UIFont(name: "Avenir-Book", size: 20)!
])


backIndicatorImage().drawAtPoint(CGPoint(x: 22, y: 30))

Change Log

v2.0.0

Note: Since this is a Swift 3 release, I decided to also clean up the API and remove all deprecation warnings. InkKit 2.0 should be considered a new API.

  • Swift 3.0 Support
  • Updated API to support Swift 3.0 guidelines
  • Shear Transforms
  • Perspective Transforms
  • Radians from Degrees function (and inverse)
  • Corner Radius with Concave, Convex and Line support
  • New Color value-type

v1.3.1

  • OSX Support
  • OSX Demo Project now included
  • Table renamed to Grid
  • Table renamed to GridComponents
  • Added convenience methods for working with paths

v1.2.0

  • Shadows
  • Borders
  • Tables

v1.1.0

  • Images
  • Strings

v1.0

  • Fills
  • Strokes
  • Geometry

API

InkKit provides many useful convenience methods for drawing and geometry calculations. Its also cross platform working across iOS & MacOS

Core

If the convenience methods below don't solve your needs, you can start by using the new methods added directly to CGContext itself:

func draw(inRect:attributes:drawing:)

Which would look like this in usage:

CGContext.current?.draw(inRect: rect, drawing: { (context, rect, attributes) in
  Color.redColor.setFill()
  UIRectFill(rect)
})

This basically wraps getting the context, setting up its frame and save/restore calls. If you provide the additional DrawingAttributes block, it will also pre-configure your context with those options for you.

Grid

init(colCount:rowCount:bounds:)
func positionForCell(atIndex:) -> (col: Int, row: Int)
func boundsForCell(atIndex:) -> CGRect
func boundsForRange(sourceColumn:sourceRow:destinationColumn:destinationRow:) -> CGRect
func boundsForCell(col:row:) -> CGRect
func enumerateCells(enumerator:(index:col:row:bounds:) -> Void)

A Grid is a really great way for laying out your drawing without having to think about placement, rect translations, etc...

I use them often for layout only, but sometimes its useful to be able to render them as well (like in the included demo).

// components is a bitmask [ .Outline, .Rows, .Columns ]
func stroke(components:attributes:)

Borders & Shadows

Supports .Outer, .Inner and .Center borders, as well as .Outer and .Inner shadows.

static func addBorder(type:path:attributes:)
static func addShadow(type:path:color:radius:offset:)

Strokes

static func strokeLine(startPoint:endPoint:startColor:endColor:angleInDegrees:attributes:)
static func strokeLine(startPoint:endPoint:color:attributes:)
static func strokePath(path:startColor:endColor:angleInDegrees:attributes:)

Fills

static func fillPath(path:startColor:endColor:angleInDegrees:attributes:)

Geometry

Many of the drawing methods use the geometry additions below, but they can also be useful for your own projects:

func divide(atDelta:fromEdge:margin:) -> (slice, remainder)
func insetBy(edgeInsets:) -> CGRect
mutating func insetInPlace(edgeInsets:)
func alignedTo(rect:horizontal:vertical:) -> CGRect
func scaledTo(rect:scaleMode:) -> CGRect

func gradientPoints(forAngleInDegrees:) -> (start, end)
func scaledTo(size:scaleMode:) -> CGSize

func reversibleRect(fromPoint:toPoint:) -> CGRect

Images

There are also additional draw methods for images:

func drawAlignedTo(rect:horizontal:vertical:blendMode:alpha:)
func drawScaledTo(rect:scaleMode:blendMode:alpha:)

static func circle(radius:attributes:) -> Image
static func draw(width:height:scale:attributes:drawing:) -> Image
static func draw(size:scale:attributes:drawing:) -> Image

Strings

Finally, we even have some easy draw methods for strings:

func drawAlignedTo(rect:horizontal:vertical:attributes:constrainedSize:)
func sizeWithAttributes(attributes:constrainedSize:) -> CGSize
func drawAtPoint(point:attributes:)
func drawInRect(rect:withAttributes)

Demo

To try it out yourself, download the source and run the included demo project.

Platforms and Versions

InkKit is supported on the following platforms:

  • iOS 8.0 and greater
  • OSX 10.11 and greater

Installation

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

pod 'InkKit'

Alternatively you can simply drag the files into your iOS or OSX project.

Author

@shaps

License

InkKit is available under the MIT license. See the LICENSE file for more info.