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SpriteKitEasingSwift

★ 120 Open GitHub ↗

Better Easing for SpriteKit in Swift

// repository documentation

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![SpriteKitEasingSwift: Better Easing for SpriteKit in Swift. ](https://raw.githubusercontent.com/craiggrummitt/SpriteKitEasingSwift/master/SpriteKitEasingSwift.png)

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This easing library began life as a port of <a href="https://github.com/buddingmonkey">buddingmonkey</a>'s Objective C <a href="https://github.com/buddingmonkey/SpriteKit-Easing">SpriteKit Easing library</a> to Swift.

This library extends upon the basic easing equations available in the SpriteKit framework by Apple.

Sprite Kit Easing makes available the following standard easing equations as SKActions.

![easing.gif](https://raw.githubusercontent.com/craiggrummitt/SpriteKitEasingSwift/master/easing.gif)

Use SKEase methods to tween properties of an SKNode, such as:
* move
* scale
* scaleX
* scaleY
* rotate
* fade
* tweenLabelColor
* tweenShapeFillColor

If you want to tween a variable, use:
* createPointTween
* createFloatTween
* createColorTween

The SKEase functions return an SKAction that performs the ease. You can then run the SKAction in the same manner you would any other SKAction in SpriteKit.

```Swift
//eg an SKLabelNode(which extends SKNode) flies in from the right with an elastic tween:
//first create an SKNode, let's create a label node
let titleLabel = SKLabelNode(fontNamed:"Avenir-Light")
titleLabel.text = "Hello world"
titleLabel.fontSize = 65
titleLabel.fontColor = UIColor.white
titleLabel.position = CGPoint(x:self.frame.midX, y:self.frame.midY)
self.addChild(titleLabel)
//perform elastic ease
titleLabel.run(SKEase.move(easeFunction: .curveTypeElastic,
easeType: .easeTypeOut,
time: 2,
from: CGPoint(x: frame.width+titleLabel.frame.width/2, y: titleLabel.position.y),
to:CGPoint(x: -titleLabel.frame.width/2, y: titleLabel.position.y)))
```

## Installation

**via CocoaPods**

SpriteKitEasingSwift is available through [CocoaPods](http://cocoapods.org). To install
it, simply add the following line to your Podfile:

```ruby
pod 'SpriteKitEasingSwift'
```

To run the example project, clone the repo, and run `pod install` from the Example directory first.

Don't forget to import the Pod where you would like to use it:

```Swift
import SpriteKitEasingSwift
```

***via Github:***

Clone the project at Github ([https://github.com/craiggrummitt/SpriteKitEasingSwift](https://github.com/craiggrummitt/SpriteKitEasingSwift)). You will find an example project there as well. To use the framework drag the SpriteKitEasingSwift/Classes folder to your project.

## Author

<a href="https://github.com/craiggrummitt">Craig Grummitt</a>

Again, credit and thanks go to <a href="https://github.com/buddingmonkey/SpriteKit-Easing">SpriteKitEasing</a> and <a href="https://github.com/warrenm/AHEasing">AHEasing</a> and the legend of easing, <a href="http://robertpenner.com/easing/">Robert Penner</a>.

## License

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

SpriteKitEasingSwift

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