您可以使用UIBezierPath的addClip方法来分割您的路径，并使用不同的颜色填充每个部分。以下是一个示例代码，演示如何使用BezierPath制作类似于山峰攀登的颜色编码：

- (void)drawRect:(CGRect)rect {
   UIBezierPath *path = [UIBezierPath bezierPathWithRect:CGRectMake(0, 0, 200, 200)];
   [[UIColor blackColor] setFill];
   [path fill];
   
   UIBezierPath *subpath1 = [UIBezierPath bezierPath];
   [subpath1 moveToPoint:CGPointMake(0, 0)];
   [subpath1 addLineToPoint:CGPointMake(0, 66)];
   [subpath1 addLineToPoint:CGPointMake(33, 33)];
   [subpath1 addLineToPoint:CGPointMake(66, 66)];
   [subpath1 addLineToPoint:CGPointMake(39, 88)];
   [subpath1 addLineToPoint:CGPointMake(0, 88)];
   [subpath1 closePath];
   [subpath1 addClip];
   
   [[UIColor blueColor] setFill];
   [path fill];
   
   UIBezierPath *subpath2 = [UIBezierPath bezierPath];
   [subpath2 moveToPoint:CGPointMake(66, 66)];
   [subpath2 addLineToPoint:CGPointMake(100, 100)];
   [subpath2 addLineToPoint:CGPointMake(100, 140)];
   [subpath2 addLineToPoint:CGPointMake(66, 125)];
   [subpath2 closePath];
   [subpath2 addClip];
   
   [[UIColor greenColor] setFill];
   [path fill];
   
   UIBezierPath *subpath3 = [UIBezierPath bezierPath];
   [subpath3 moveToPoint:CGPointMake(100, 140)];
   [subpath3 addLineToPoint:CGPointMake(120, 120)];
   [subpath3 addLineToPoint:CGPointMake(140, 140)];
   [subpath3 closePath];
   [subpath3 add