ValueAnimator

• Multiple properties in funcion 'onChanged'

Demo

Usage

ValueAnimator makes the transition from initial value to target value using easing functions.

Simple animation

let animator = ValueAnimator.animate("some", from: 0, to: 360, duration: 1.0,
    onChanged: { p, v in 
        print("property \(p): \(v.value)")
    },
    easing: EaseCircular.easeIn())
animator.resume()

Yoyo annimation with 2 values

let yoyoAni = ValueAnimator.animate(
    props: ["h", "w"], 
    from: [20, 30], 
    to: [5, 150], 
    duration: 1.4, 
    easing: EaseSine.easeInOut(), 
    onChanged: { p, v in
        if p == "h" {
            let width = self.rect1.bounds.width
            self.rect1.frame = CGRect(x: 24, y: 140, width: width, height:v.cg)
        } else {
            let height = self.rect1.bounds.height
            self.rect1.frame = CGRect(x: 24, y: 140, width:v.cg, height: height)
        }
    }, 
    option: ValueAnimator.OptionBuilder()
        .setYoyo(true)
        .build())
yoyoAni.resume()

Thread

ValueAnimator uses its own work-thread. But the callback changeCallback, endCallback is called in main-thread. if you wanna it called in work-thread, you just set the 'callbackOnMainThread' property is false.

let someView: UIView!
let animator = ValueAnimator.animate("some", from: 0, to: 1, duration: 1.0,
    onChanged: { p, v in 
        // called in ValueAnimator's work-thread
    },
    easing: EaseCircular.easeIn())
animator.callbackOnMainThread = false
animator.resume()

Example

To run the example project, clone the repo, and run open ValueAnimator.xcworkspace. You can see ValueAnimatorExample project.

Installation

CocoaPods

Simply add the following line to your Podfile:

pod 'ValueAnimator'

Swift Package Manager

• Open Xcode
• Go to File > Swift Packages > Add Package Dependency...
• Paste this Github Repo URL (https://github.com/brownsoo/ValueAnimator) into the search bar.
• Select the ValueAnimator repo from the search results.

Author

brownsoo, @medium

License

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