iOS-多媒体-强大的动画-序列帧和无限循环动画-9Cheetah-serial-repeating

Cheetah ====== [](https://github.com/Carthage/Carthage)     Cheetah is an animation utility on iOS with Swift. Cheetah can animate any properties since Cheetah uses simple CADisplayLink run loop to change animated properties. Requirements ---- - iOS 8.0~ - Swift 3.0 Features ---- - Animation with duration and delay - Changing with absolute/relative properties - Parallel/Serial executions - Easings - Springs Carthage ---- Carthage is a simple, decentralized dependency manager for Cocoa. To install Cheetah, simply add the following line to your Cartfile: ``` github "suguru/Cheetah" ``` Code Example ---- ```swift // Create view let box = UIView(frame:CGRectMake(100,100,50,50)) box.backgroundColor = UIColor.blueColor() view.addSubview(box) // Move to 100px right box.cheetah.move(100, 0).run() ```  Properties ---- Cheetah has several methods to animate properties easily. You can also animate your own properties with extending CheetahProperty. - move - position (absolute of move) - scale - rotate - rotation (absolute of rotate) - size - frame - alpha - backgroundColor - textColor - borderColor - borderWidth - borderRadius - custom properties Parallel execution ---- Cheetah groups animation properties and execute them at once. ```swift view.cheetah .move(100, 0) .rotate(M_PI * 2) .scale(1.5) .run() ```  Serial execution ---- `wait` will wait until all animations placed before it completed. It can also receive seconds to wait to start next animation. ```swift view.cheetah .move(100, 0).rotate(M_PI) .wait() .move(-100, 0).rotate(-M_PI) .wait(1.0) // <- wait 1 sec to start next animation .move(0, -20).duration(0.4) .wait() .move(0, 20).duration(0.4) .run() ```  Duration and delay ---- Cheetah has duration and delay to each animation properties. ```swift view.cheetah .move(100, 0).duration(1.0).delay(1.0) .rotate(M_PI).duration(2.0) .wait(1) .move(-100, 0).duration(0.4) .run() ```  Duration will be copied from the property placed before. ```swift view.cheetah .duration(0.5) .move(100, 0) // <- will have 0.5 sec duration .rotate(M_PI) // <- will have 0.5 sec duration .run() ``` Repeating ---- To repeat animations, use `repeatCount(count: Int)` ```swfit view.cheetah.rotate(M_PI_2).run().repeat(3) ``` To repeat forever, use `forever` ```swift view.cheetah.rotate(M_PI_2).run().forever ```  Easings ---- Cheetah supports various easing functions. You can also add custom easings with quad bezier points.  Exmaple ```swift view.cheetah.move(150, 150).easeInQuad.run() ``` Supported eassing equations - Linear - Sine - Quad - Quart - Quint - Circ - Cubic - Expo - Back - Bounce - Elastic Springs ---- Cheetah supports spring dynamics with tension and friction parameters.  Example ```swift view.cheetah .move(200, 0) .spring() .run() view.cheetah .move(200, 0) .spring(tension: 100, friction: 4) .run() ``` Animate custom properties ---- You can extend CheetahProperty to animate custom properties. You can refer CheetahViewProperties.swift and CheetahLayerProperties.swift. :)