IFTTT開源Swift編寫的幀動畫框架--RazzleDazzle
RazzleDazzle 是IFTTT開源的一個iOS幀動畫框架，用Swift編寫，非常適用于APP初次使用時的介紹和引導信息。RazzleDazzle由IFTTT此前開源的一款Objective-C滾動幀動畫庫JazzHands發 展而來。JazzHands是UIKit一個簡單的關鍵幀基礎動畫框架，可通過手勢、scrollview、KVO或者ReactiveCocoa控制動 畫，被IFTTT應用在IFTTT for iPhone上。多款知名應用程序都使用了JazzHands這個框架，目前其在github上有3688個star。對于RazzleDazzle，開發者除了使用RazzleDazzle支持的動畫類型外，還可以使用自定義動畫類型。
RazzleDazzle支持的動畫類型：
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AlphaAnimation animates the alpha property (creates fade effects).
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BackgroundColorAnimation animates the backgroundColor property.
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RotationAnimation animates a rotation transform (for rotation effects).
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ScaleAnimation applies a scaling transform (to scale view sizes).
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TranslationAnimation applies a translation transform (to translate view position).
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CornerRadiusAnimation animates the layer.cornerRadius property.
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HideAnimation animates the hidden property (hides and shows views).
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LayerStrokeStartAnimation animates the strokeStart property of a CAShapeLayer (does not work with LayerStrokeEndAnimation).
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LayerStrokeEndAnimation animates the strokeEnd property of a CAShapeLayer (does not work with LayerStrokeStartAnimation).
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LayerFillColorAnimation animates the fillColor property of a CAShapeLayer.
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LayerStrokeColorAnimation animates the strokeColor property of a CAShapeLayer.
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PathPositionAnimation animates the layer.position property of a UIView along a path.
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LabelTextColorAnimation animates the textColor property of a UILabel.
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ConstraintConstantAnimation animates an AutoLayout constraint constant.
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ConstraintMultiplierAnimation animates an AutoLayout constraint constant as a multiple of an attribute of another view (to offset or resize views based on another view's size)
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ScrollViewPageConstraintAnimation animates an AutoLayout constraint constant to place a view on a scroll view page (to position views on a scrollView using AutoLayout). This is the animation doing the heavy lifting for AnimatedPagingScrollViewController's keepView(view: onPage:) function.
</li> </ul> </div> https://github.com/IFTTT/RazzleDazzle