Varying lineWidth in a CAShapeLayer

Question

I'm working on a little project where I want to draw a bezier curve. I want to be able to vary the lineWidth in different portions of the drawing.

Here's what I have:

CAShapeLayer *pathLayer = [CAShapeLayer layer];
pathLayer.frame = self.animationLayer.bounds;
pathLayer.bounds = pathRect;
pathLayer.geometryFlipped = YES;
pathLayer.path = path.CGPath;
pathLayer.strokeColor = [[UIColor blackColor] CGColor];
pathLayer.fillColor = nil;
pathLayer.lineWidth = 1.0f;
pathLayer.lineJoin = kCALineJoinBevel;

How would I vary the width of the line? One solution might be to have multiple UIBezierPaths with multiple CAShapeLayers, but it seems there should be a simpler, more elegant solution (something along the lines of specifying the lineWidth at the level where the UIBezierPath lines are specified).

Thanks!

Answer 1

UIBezierPath only has one lineWidth property, so it's not possible to draw varying line widths with one path. You would have to use multiple paths to achieve this effect.