设置UILabel行间距 [英] Set UILabel line spacing

问题描述

如何修改多行中的行之间的间隙 UILabel ？

How can I modify the gap between lines in a multiline UILabel?

推荐答案

编辑：显然， NSAttributedString 会在iOS 6及更高版本上执行。而不是使用 NSString 设置标签的文本，创建一个 NSAttributedString ，设置属性，然后将其设置为标签上的 .attributedText 。你想要的代码将是这样：

Evidently NSAttributedString will do it, on iOS 6 and later. Instead of using an NSString to set the label's text, create an NSAttributedString, set attributes on it, then set it as the .attributedText on the label. The code you want will be something like this:

NSMutableAttributedString* attrString = [NSMutableAttributedString attributedStringWithString:@"Sample text"];
NSMutableParagraphStyle *style = [[NSMutableParagraphStyle alloc] init];
[style setLineSpacing:24];
[attrString addAttribute:NSParagraphStyleAttributeName
    value:style
    range:NSMakeRange(0, strLength)];
uiLabel.attributedText = attrString;

由于历史原因，这里是我原来的答案：

For historical reasons, here's my original answer:

简短答案：您不能。要更改文本行之间的间距，您必须将 UILabel 子类化并滚动您自己的 drawTextInRect ，创建多个标签，或使用不同的字体（也许是为特定行高编辑的，请参阅Phillipe的答案）。

Short answer: you can't. To change the spacing between lines of text, you will have to subclass UILabel and roll your own drawTextInRect, create multiple labels, or use a different font (perhaps one edited for a specific line height, see Phillipe's answer).

长答案在线世界，文本行之间的空间被称为领先（具有标题的韵律，并且来自几十年前使用的铅金属）。 Leading是 UIFont 的只读属性，它在4.0中已弃用，并由 lineHeight 替代。据我所知，没有办法创建一个特定的参数集，如 lineHeight ;

Long answer: In the print and online world, the space between lines of text is known as "leading" (rhymes with 'heading', and comes from the lead metal used decades ago). Leading is a read-only property of UIFont, which was deprecated in 4.0 and replaced by lineHeight. As far as I know, there's no way to create a font with a specific set of parameters such as lineHeight; you get the system fonts and any custom font you add, but can't tweak them once installed.

中没有空格参数UILabel

There is no spacing parameter in UILabel, either.

我不是特别满意 UILabel ，所以我建议写你自己的子类或使用第三方库。这将使行为独立于您的字体选择，并且是最可重用的解决方案。

I'm not particularly happy with UILabel's behavior as is, so I suggest writing your own subclass or using a 3rd-party library. That will make the behavior independent of your font choice and be the most reusable solution.

我希望 在 UILabel ，我很乐意证明错了！

I wish there was more flexibility in UILabel, and I'd be happy to be proven wrong!

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