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
。