使用CoreText显示NSAttributedString [英] Display NSAttributedString using CoreText

问题描述

我听说我可以使用CoreText显示NSAttributedString，有人能说我怎么样（最简单的方式）？

I have heard that I can display a NSAttributedString using CoreText, can anyone say me how (The simplest way)?

请不要用CATextLayer回答或OHAttributedLabel。

Please, don't answer with CATextLayer or OHAttributedLabel.

我知道在这个论坛上有很多关于此的问题，但我找不到答案

I know that there are a lot of questions about this in this forum, but I haven't find the answer

谢谢!!

推荐答案

我认为最简单的方法（使用Core Text）是：

I think that the simplest way (using Core Text) is:

 // Create the CTLine with the attributed string
 CTLineRef line = CTLineCreateWithAttributedString(attrString); 

 // Set text position and draw the line into the graphics context called context
 CGContextSetTextPosition(context, x,  y);
 CTLineDraw(line, context);

 // Clean up
 CFRelease(line);

如果您正在绘制大量文本，使用Framesetter会更有效但这是Apple推荐的方法如果您只需要显示少量文本（如标签）并且不需要您创建路径或框架（因为它是由 CTLineDraw ）。

Using a Framesetter is more efficient IF you are drawing lots of text but this is the method recommended by Apple if you just need to display a small amount of text (like a label) and doesn't require you to create a path or frame (since it is done for you automatically by CTLineDraw).

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