问题描述
1.本人想知道CoreAnimation（核心动画）和CoreGraphics（核心？）这两个框架的区别
2.通过查询并未得到很令人满意的答案，所以来此想大牛提问
3.占用GPU的情况是如何的？
问题解答
回答1：首先说一下 Graphic是是图形的意思。
对比一下头文件先
CoreAnimation.h
#ifndef COREANIMATION_H#define COREANIMATION_H#include <QuartzCore/CABase.h>#include <QuartzCore/CATransform3D.h>#ifdef __OBJC__#import <Foundation/Foundation.h>#import <QuartzCore/CAAnimation.h>#import <QuartzCore/CADisplayLink.h>#import <QuartzCore/CAEAGLLayer.h>#import <QuartzCore/CAMetalLayer.h>#import <QuartzCore/CAEmitterBehavior.h>#import <QuartzCore/CAEmitterCell.h>#import <QuartzCore/CAEmitterLayer.h>#import <QuartzCore/CAGradientLayer.h>#import <QuartzCore/CALayer.h>#import <QuartzCore/CAMediaTiming.h>#import <QuartzCore/CAMediaTimingFunction.h>#import <QuartzCore/CAReplicatorLayer.h>#import <QuartzCore/CAScrollLayer.h>#import <QuartzCore/CAShapeLayer.h>#import <QuartzCore/CATextLayer.h>#import <QuartzCore/CATiledLayer.h>#import <QuartzCore/CATransaction.h>#import <QuartzCore/CATransformLayer.h>#import <QuartzCore/CAValueFunction.h>#endif#endif /* COREANIMATION_H */
CoreGraphics.h
#ifndef COREGRAPHICS_H_#define COREGRAPHICS_H_#include <CoreGraphics/CGBase.h>#include <CoreGraphics/CGAffineTransform.h>#include <CoreGraphics/CGBitmapContext.h>#include <CoreGraphics/CGColor.h>#include <CoreGraphics/CGColorSpace.h>#include <CoreGraphics/CGContext.h>#include <CoreGraphics/CGDataConsumer.h>#include <CoreGraphics/CGDataProvider.h>#include <CoreGraphics/CGError.h>#include <CoreGraphics/CGFont.h>#include <CoreGraphics/CGFunction.h>#include <CoreGraphics/CGGeometry.h>#include <CoreGraphics/CGGradient.h>#include <CoreGraphics/CGImage.h>#include <CoreGraphics/CGLayer.h>#include <CoreGraphics/CGPDFArray.h>#include <CoreGraphics/CGPDFContentStream.h>#include <CoreGraphics/CGPDFContext.h>#include <CoreGraphics/CGPDFDictionary.h>#include <CoreGraphics/CGPDFDocument.h>#include <CoreGraphics/CGPDFObject.h>#include <CoreGraphics/CGPDFOperatorTable.h>#include <CoreGraphics/CGPDFPage.h>#include <CoreGraphics/CGPDFScanner.h>#include <CoreGraphics/CGPDFStream.h>#include <CoreGraphics/CGPDFString.h>#include <CoreGraphics/CGPath.h>#include <CoreGraphics/CGPattern.h>#include <CoreGraphics/CGShading.h>#endif /* COREGRAPHICS_H_ */
仔细观察可以看出，CoreGraphics是底层绘制框架，我们实际会用到的也就是CG开头的一些底层绘制函数和变量，这是一个纯C语言框架。
QuartzCore也就是你说的包含了CoreAnimation的框架，是iOS系统的基本渲染框架，是一个OC语言框架，是一套基于CoreGraphics的OC语言封装，封装出了基本渲染类CALayer。
不知道说到这里，你能不能搞明白两者的区别。
