iOS: CGContext的函数CGContextAddLines

void CGContextAddLines (

   CGContextRef c,

   const CGPoint points[],

   size_t count

);

example:

CGContextMoveToPoint (c, points[0].x, points[0].y);

for (k = 1; k < count; k++) {

    CGContextAddLineToPoint (c, points[k].x, points[k].y);

}