UILabel在ios11中出现了错误的词包-UILabelwrongwordwrapiniOS11

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This could very likely be an intentional change by Apple to prevent widowed lines. From a design perspective, it is preferred to avoid having a single word on a line of text. So it seems that UILabel now breaks the line in a way that a the second line of text always has at least 2 words on it.

这很可能是苹果公司为防止丧偶生产线而故意做出的改变。从设计的角度来看，最好避免在一行文本中出现一个单词。看来UILabel现在打破了这条线，因为第二行总是至少有两个词。

It is surprising that there is no documentation or way to disable this behavior though.

令人惊讶的是，没有文档或方法禁用这种行为。

Also here's a good article about "widowed"and "orphaned text.

这里还有一篇关于“寡妇”和“孤儿文本”的好文章。

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This is not really an answer, but I want to add an illustration of how it is a general problem, not at all related to ampersands.

这并不是一个真正的答案，但我想要说明的是它是一个普遍的问题，而不是与ampersands相关的。

Both of these UILabels have identical width constraints, and the text is almost identical. But the second has the word wrap I would expect. The first is incorrect, the "about" can clearly stay on the first line.

这两个UILabels都有相同的宽度限制，而且文本几乎相同。但是第二个词是“wrap”这个词。第一个是不正确的，“about”可以明显地停留在第一行。

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Launching the app with the arguments -NSAllowsDefaultLineBreakStrategy NO (an undocumented defaults setting) seems to force back to the old behavior. Alternatively, you can set NSAllowsDefaultLineBreakStrategy to NO in NSUserDefaults at startup (Apple registers a default of YES for that value when UILabel or the string drawing code is initialized, it appears, so you would need to register an overriding value after that, or insert it into the NSArgumentDomain, or just set the default persistently).

使用参数- nsallowsdefaultbreakstrategy NO(一个未文档化的默认设置)启动应用程序，似乎会迫使您回到旧的行为。另外,你可以设置在NSUserDefaults NSAllowsDefaultLineBreakStrategy没有启动(苹果注册是的的一个默认值UILabel或初始化字符串绘图代码时,它出现了,你需要注册一个压倒一切的价值之后,或将其插入到NSArgumentDomain,或者只是设置默认持续)。

Apple may consider that private API and reject apps that use it; I'm not sure. I have not tried this in a shipping app. However, it does work in quick testing -- saw the setting in NSUserDefaults and found changing it altered the behavior.

苹果可能会考虑这个私有API，拒绝使用它的应用;我不确定。我还没有在一个航运应用程序中尝试过这一点。但是，它确实可以在快速测试中使用——查看了NSUserDefaults中的设置，发现改变会改变它的行为。

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It seems that replacing the space before the ampersand with a non-breaking space (U+00A0) keeps the ampersand on the same line. Depending on how you are generating the text for the label, this might not be easy to automate (maybe you really do need the ampersand to be on the second line in some cases).

似乎用一个不间断的空格(U+00A0)替换了与号之前的空格，使与号保持在同一条线上。根据如何为标签生成文本，这可能不容易自动化(在某些情况下，可能确实需要在第二行中使用&号)。

0  

An option may be to use a UITextView instead -- that does not seem to have this behavior. If you set the NSTextContainer.lineFragmentPadding to 0, the textContainerInset to UIEdgeInsetsZero, and turn off all scrolling (scrollEnabled, bounces, scroll indicators, etc.) it will display similarly to a UILabel, though not with as much constraint flexibility. It's not a drop-in replacement, but in some situations it's acceptable.

一个选项可能是使用UITextView，而不是这种行为。如果您设置了NSTextContainer。行分割填充为0,textContainerInset设置为uiedgeinsets0，并关闭所有滚动(启用scrollEnabled、bounces、滚动指示器等)，它将显示与UILabel类似的内容，但没有那么大的约束灵活性。这并不是替代，但在某些情况下是可以接受的。