Quartz2D

<span>#import <span>"DrawSomePath.h"</span></span>

<span><span>@implementation</span> <span>DrawSomePath</span></span>

-(<span>void</span>)drawRect:(<span>CGRect</span>)rect{
    <span>//获得图形上下文</span>
    CGContextRef context = UIGraphicsGetCurrentContext();
    <span>//创建一个可变的路径</span>
    CGMutablePathRef path = CGPathCreateMutable();
    <span>//使用CGPath开头的方法创建要绘制的路径</span>


    CGPathAddEllipseInRect(path, <span>NULL</span>, CGRectMake(<span>10</span>, <span>10</span>, <span>100</span>, <span>100</span>));

    CGPathAddEllipseInRect(path, <span>NULL</span>, CGRectMake(<span>20</span>, <span>20</span>, <span>80</span>, <span>80</span>));

    CGPathAddEllipseInRect(path, <span>NULL</span>, CGRectMake(<span>30</span>, <span>30</span>, <span>60</span>, <span>60</span>));

    CGPathAddEllipseInRect(path, <span>NULL</span>, CGRectMake(<span>40</span>, <span>40</span>, <span>40</span>, <span>40</span>));

    CGPathAddEllipseInRect(path, <span>NULL</span>, CGRectMake(<span>50</span>, <span>50</span>, <span>20</span>, <span>20</span>));

    CGContextSetLineWidth(context, <span>5</span>);

    <span>//将路径加入上下文中</span>
    CGContextAddPath(context, path);
    <span>//开始渲染</span>
    CGContextStrokePath(context);
}

<span>@end</span>