如何找出截断的UILabel文本的宽度

问题描述

我有 UILabel ，其中包含动态文字。有时文字太长而无法显示，因此自动截断。如何查找截断文本的可见部分的宽度？

I have UILabel, which contains dynamic text. Sometimes text is too long to be shown and thus automagically truncated. How do I find out width of the visible part of truncated text?

sizeThatFits返回未截断文本的长度，所以目前我只能检测何时进行截断。需要知道多少是可见的，包括那三个点。任何提示？

sizeThatFits returns length of untruncated text, so at the moment I can only detect when truncation will be done. Need to know how much is visible, including those three dots. Any tips?

澄清：当文本被截断时，它通常比UILabel宽度短。

Clarification: when text is truncated, it's usually shorter than UILabel width.

推荐答案

机器人K是正确的。

如果我是你，我会做以下事情：

If I was you I'd do the following:

  UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 200, 24)];
  label.text = @"this is some really long text that i want in a small label";
  [view addSubview:label];

  CGSize size = [label.text sizeWithFont:label.font constrainedToSize:label.frame.size
                 lineBreakMode:label.lineBreakMode];

这应该给你一个小于200的值（考虑到约束的最大尺寸和截断方法） 。

This should give you a value less than 200 (taking into account the constrained max size and truncation method).

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