NSStringDrawingUsesDeviceMetrics标志是什么意思，我们如何使用它？ [英] What does the NSStringDrawingUsesDeviceMetrics flag mean and how do we use it?

问题描述

这个问题与我在如何测量Cocoa中文本的可见边界？。

这里有几个链接说明了标志的含义。

Apple文档

苹果列表回答一个类似的问题

Here are a couple of links explaining the meaning of the flag.
Apple docs
Apple lists answer to a similar question

从上面的内容，我猜测选项 NSStringDrawingUsesDeviceMetrics 用于获得文本的可见边界，但它似乎不这样做。在输入（字体和字符串）中，我试图给予方法 boundingRectWithSize：options：attributes：没有一个输出是不同的，没有给。

From the above, I guess the option NSStringDrawingUsesDeviceMetrics is given for obtaining the visible bounds of text but it doesn't seem to do that. Among the inputs (font and string) I tried giving to the method boundingRectWithSize:options:attributes: none of the outputs were different when the flag was given compared to when the flag was not given. Am I doing something wrong or is it a bug in Cocoa?

谢谢

推荐答案

Google这个猴子补丁

Google this monkey patch

NS（Attributed）String + Geometrics

NS(Attributed)String+Geometrics

相当可靠。

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