应用纹理来描边CGContextStrokePath

问题描述

我正在制作一个简单的绘图程序。到目前为止，我能够使用给定的颜色描绘路径并且一切都很好。我想知道是否有办法用纹理而不是颜色来抚摸它。比方说，我想给路径看铅笔线。关于如何做到这一点的任何想法？

I am working on making a simple drawing program. So far I am able to stroke the path with a given color and that all works out fine. I was wondering if there was a way to stroke it with a texture instead of a color. Say for instance I want to give the path the look of a pencil line. Any idea on how I would go about doing that?

提前感谢您的帮助！

推荐答案

1. 开始。




3. 使用任何非路径描边路径透明的颜色。


4. 设置为。


5. 使用所需的纹理图案填充步骤2中的边界矩形。


6. 结束透明层。

1. Begin a transparency layer.
2. Get the path's bounds.
3. Stroke the path with any non-transparent color.
4. Set the blend mode to source in.
5. Fill the bounding rectangle from step 2 with the desired texture pattern.
6. End the transparency layer.

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