如何在iOS中将多行字符串或多行标签创建为CGPath？ [英] How to create a multiline string or multiline label as a CGPath in iOS?

问题描述

API是否支持此功能？如果没有，我该怎么办？

Does the API support this? If not, how could I do it?

Core Text中有 CTFontCreatePathForGlyph ，可以翻译单个字符进入一条小路。我可以在循环中使用它来创建字符串作为路径，但是我必须处理间距和字距调整以及所有其他讨厌的事情。我正在寻找一个字符串路径，如果该字符串路径是在UILabel中以相同的字体和大小绘制的，则该字符串路径将看起来相同。

There is CTFontCreatePathForGlyph in Core Text, which can translate a single character into a path. I could use that in a loop to create my string as a path, but I'd have to deal with spacing and kerning and all the other nasty things. I'm looking for a string path that would looks the same if it was drawn in a UILabel with same font and size.

推荐答案

查看此项目中的UIBezierPath + TextPaths类别： https://github.com/aderussell/string -to-CGPathRef 。

Look at the UIBezierPath+TextPaths category in this project: https://github.com/aderussell/string-to-CGPathRef.

它显示了如何为单行和多行字符串创建路径以及如何在CAShapeLayers中使用它们。

It shows how to create paths for single and multi-line strings and how to use them with CAShapeLayers.

该类别只是一个包装器，内部函数可以在iOS或Mac OS X中使用，您只需要将项目链接到CoreText框架即可。

The category is just a wrapper and the internal functions can be used in iOS or Mac OS X, you just need to link your project to the CoreText framework.

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