在NSTextView中显示隐藏的字符 [英] Display hidden characters in NSTextView

问题描述

我正在为Mac OS X编写文本编辑器。我需要在NSTextView中显示隐藏的字符（例如空格，制表符和特殊字符）。我已经花了很多时间寻找如何做到这一点，但到目前为止，我还没有找到答案。如果有人能指出正确的方向，我将不胜感激。

I am writing a text editor for Mac OS X. I need to display hidden characters in an NSTextView (such as spaces, tabs, and special characters). I have spent a lot of time searching for how to do this but so far I have not found an answer. If anyone could point me in the right direction I would be grateful.

推荐答案

看看NSLayoutManager类。您的NSTextView将具有与其关联的布局管理器，并且布局管理器负责将字符（空格，制表符等）与字形（该字符在屏幕上绘制的图像）相关联。

Have a look at the NSLayoutManager class. Your NSTextView will have a layout manager associated with it, and the layout manager is responsible for associating a character (space, tab, etc.) with a glyph (the image of that character drawn on the screen).

在您的情况下，您可能对 replaceGlyphAtIndex：withGlyph： 方法，将允许您替换单个字形。

In your case, you would probably be most interested in the replaceGlyphAtIndex:withGlyph: method, which would allow you to replace individual glyphs.

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