ZCAnimatedLabel

UILabel-like view with easy to extend appear/disappear animation

Features

• Rich text support (with NSAttributedString)
• Group aniamtion by character/word/line
• Customizable animation start delay for each text block
• Great performance, only changed area is redrawn
• Optional layer-based implementation
• 3D/Geometry transform support (layer based only)
• iOS 5+ compatibility

Demo

• Default

• Fall

• Duang/Spring

• Flyin

• Focus

• Shapeshift

• Reveal

• Thrown

• Transparency

• Spin

• Dash

• More to come

How to use

ZCAnimatedLabel is available via CocoaPods. If you don't need all the effect subclasses, simply drag ZCAnimatedLabel.(h|m), ZCCoreTextLayout.(h|m) and ZCEasingUtil.(h|m) into your project and start customizing your own.

Subclassing

ZCAnimatedLabel has two modes: non-layer based and layer based. In the first mode, ZCAnimatedLabel is a flat UIView, every stage of animation is drawn using Core Graphics, you can customize redraw area for your animation for better performance. Following methods can be overriden:

• - (void) textBlockAttributesInit: (ZCTextBlock *) textBlock;
• - (void) appearStateDrawingForRect: (CGRect) rect textBlock: (ZCTextBlock *) textBlock;
• - (void) disappearStateDrawingForRect: (CGRect) rect textBlock: (ZCTextBlock *) textBlock;
• - (CGRect) redrawAreaForRect: (CGRect) rect textBlock: (ZCTextBlock *) textBlock;

Second option is layer based, where each text block is a simple CALayer, 3D tranform is possible in this mode by setting layer's transform property, if redraw area is bigger and not too many text blocks, this can achive a performance gain. Set self.layerBased to YES and override following methods for customization:

• - (void) textBlockAttributesInit: (ZCTextBlock *) textBlock;
• - (void) appearStateLayerChangesForTextBlock: (ZCTextBlock *) textBlock;
• - (void) disappearLayerStateChangesForTextBlock: (ZCTextBlock *) textBlock;

Todo

• Merge CALayers no longer animating into a single backing store and reuse CALayer for animating layers. (Even better performance for layerBased implementation)
• More Effects, possily glyph related ones
• Use core animation emmiter

Thanks to

• LTMorhpingLabel for heavy inspiration. If you like ZCAnimatedLabel, you should definitely this one out.
• AGGeometryKit for arbitrary shape 3D transform code piece used in ZCDashLabel