CAShapeLayer的一些資料收集

https://github.com/CoderJackyHuang/UIBezierPathLayerDemos/blob/master/UIBezierPath_And_CAShapeLayer/ViewController.m

CALayer中anchorPoint和position的用法

http://blog.csdn.net/primer_programer/article/details/9904287

iOS CAShapeLayer精講

http://www.jianshu.com/p/5f08035056f6

使用CALayer的Mask實現注水動畫效果

http://www.cocoachina.com/ios/20151012/13637.html

wuwen1030/CALayerAnimationDemo

https://github.com/wuwen1030/CALayerAnimationDemo

基於Core Animation的KTV歌詞視圖的平滑實現

http://www.iwangke.me/2014/10/06/how-to-implement-a-core-animation-based-60-fps-ktv-lyrics-view/

拉伸過濾

https://zsisme.gitbooks.io/ios-/content/chapter4/scaling-filters.html