如何删除一行 UILabel 下方的额外填充 [英] How to remove the extra padding below an one line UILabel

问题描述

我想用一个UILabel来显示一些从服务器发送过来的词，这些词我设置为NSMutableAttributeString有时只占一行(只有在这种情况下，问题才会出现).

I wanna to use a UILabel to show some words which is sent from Server，these words which i set them as NSMutableAttributeString sometimes only occupy one line (only in this case, the problem comes).

我打算获得标签占用的确切空间，但是当标签只占用一行时，非常重要 - 我使用 lineSpacing 设置 NSMutableAttributeString (10px,NSMutableParagraphStyle)，但这，出乎意料的是，即使这里只有一行，问题也可以显示为单词下方的一些额外填充(我用一些中文单词进行测试，但注意:如果单词占用多于一行，则没有问题).和奇怪的故事是——如果单词是纯英文或阿拉伯数字，则不存在多余的填充)

I intend to get the exact space which the label would take up,but when the label only takes up one line,and very important — i set the NSMutableAttributeString with lineSpacing (10px,NSMutableParagraphStyle),but this，unexpectedly， would also works when even there is only one line here — the problem shows up as some extra padding below the word (i test with some chinese word,but attention: if the words takes up more than one line, there is no problem). and the weird story is — if the word is purely english or Arabic numerals，the extra padding won't exist)

下面的图片可能会更清楚地说明问题:

the following pics may shows the problem a little clearly:

1.英文单词——单行(无额外填充)[测试词:今天 0987776]

1.English words -- oneline (no extra padding)[test words:today 0987776]

2.中文单词——oneline (some extra padding)[测试词:今天天气好啊！]

2.Chinese words -- oneline (some extra padding)[test words:今天天气好啊!]

希望有人帮忙.非常感谢.

Hope someone would help . Thx a lot.

推荐答案

在标签上使用 sizeToFit 到文本所需的大小

use sizeToFit on a label to the size required by the text

[yourlabelName sizeToFit];

任何其他 padding 将来自字体，标签本身不应用任何其他填充

any other padding would be from the font, the label itself doesn't apply any other padding

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