Ease is an event driven animation system that combines the observer pattern with custom spring animations as observers

Related tags

Animation swift events observer spring system animation gyroscope observable event observer-pattern animations scenekit observables ease spring-animation easing observe uiscrollview swift5 swift-5
Overview

Ease

Ease is an event driven animation system that combines the observer pattern with custom spring animations as observers. It's magic.

Features

  • Animate any value type
  • Set multiple animations for a single value
  • Animation trajectories update when you update the targetValue
  • Add natural spring behavior to any value change
  • Optimized for Swift 5
  • Compatible with iOS 9 and up

Supported value types

  • CGFloat
  • CGPoint
  • CGSize
  • CGVector
  • Int
  • Float
  • Double
  • SCNVector3

Easily extendible with more (custom) types.

Examples

How

Create your Ease object with an initial value

var ease: Ease = Ease(view.center, minimumStep: 0.001)

Add your custom spring-animation(s)

ease.addSpring(tension: 300, damping: 15, mass: 1) { position in
    view.center = position
}

Set the target value of your Ease object and adjust your target as often as you want

ease.targetValue = gestureRecognizer.location(in: view)

Memory management

For a single spring-animation you can store the returned EaseDisposable to a variable

disposable = ease.addSpring(tension...

For multiple spring-animations you can add the disposable to a EaseDisposal variable

ease.addSpring(tension...) { }.add(to: &disposal)

And always weakify self when referencing self inside your spring-animation

ease.addSpring(tension...) { [weak self] position in

Installation

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

pod 'Ease'

Suggestions or feedback?

Feel free to create a pull request, open an issue or find me on Twitter.

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Comments
  • Ease complete notification

    Ease complete notification

    Hi, thanks for the great utility. I’m trying to execute some code once the spring animation is complete so trying to work out how best to get notified that the Ease isPaused or has reached the target value.

    opened by whiteangle 5
  • Package.swift

    Package.swift

    Adding a Package.swift allows anyone to add Ease as a SPM dependency through Xcode 11 or manually.

    *.podspec linguist-vendored gets the project to display "Swift 100%" in Github.

    opened by hallee 2
  • compile error in Example 3D (Easy3DSceneKit/GameViewController.swift)

    compile error in Example 3D (Easy3DSceneKit/GameViewController.swift)

    Noticed a compile-error: line 69: Easy3DSceneKit/GameViewController.swift Extra argument 'damping' in call

    ease.addSpring(tension: tension, damping: damping, mass: mass) { point, _ in childNode.runAction(SCNAction.rotateTo(x: point.y / 35, y: point.x / 250, z: 0, duration: 0)) }.add(to: &disposal)

    similar error in Example project as well.

    opened by lingolab2 1
  • Example3D crash

    Example3D crash

    failed assertion `RenderPass Descriptor Validation MTLRenderPassAttachmentDescriptor MTLStoreActionMultisampleResolve store action for the depth attachment is not supported by device PixelFormat MTLPixelFormatDepth32Float cannot be a MSAA resolve target

    xcode 13.1 iOS 15 iphonesimulator

    opened by ccworld1000 1
Releases(3.2.0)
Owner
Robert-Hein Hooijmans
iOS Developer
Robert-Hein Hooijmans
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