描画 - objcmemo @ ウィキ

/*
*  矩形描画
*/
CGContextRef context = UIGraphicsGetCurrentContext();
CGPathRef path = CGPathCreateWithRect(rect, NULL);
[[UIColor lightGrayColor] setFill];
[[UIColor redColor] setStroke];
CGContextAddPath(context, path);
CGContextDrawPath(context, kCGPathFillStroke);
CGPathRelease(path);