原创 CTM transforms vs Affine Transforms in iOS (for translate, rotate, scale)
參考URL:http://stackoverflow.com/questions/30756907/ctm-transforms-vs-affine-transforms-in-ios-for-translate-rotate-scale
參考URL:http://stackoverflow.com/questions/30756907/ctm-transforms-vs-affine-transforms-in-ios-for-translate-rotate-scale