Quartz2d drawing technology

Quartz2D Graphic technology

1. Preface

stay iOS in , Whatever technology is used , Cannot leave UIView, Drawing takes place in UIView Within the area of the object . If it is the default view , The drawing work is done by iOS Automatically processed by the system ; If it is a custom view , You must rewrite drawRect: Method , Before that, provide the corresponding drawing code .

2. example