如何在Swift中以编程方式调整UILabel行间距？ [英] How to adjust a UILabel line spacing programmatically in Swift?

问题描述

我有一条多行 UILabel ，如下所示：

I have a multiline UILabel as shown here:

我使用以下代码实现了这个目的：

I achieved this using the following code:

label.lineBreakMode = .ByWordWrapping
label.numberOfLines = 2

我试图减少 第一行和第二行之间的行间距，我尝试使用以下代码：

I'm trying to "decrease" the line spacing between the 1st line and 2nd line, and I tried to use the following code:

let text = label.attributedText
let mas = NSMutableAttributedString(attributedString:text!)
            mas.replaceCharactersInRange(NSMakeRange(0, mas.string.utf16.count),
                withString: label.text!)
label.attributedText = mas

然而，它似乎不起作用。

However, it does not seem to work.

谢谢

推荐答案

你在右边的tra ck与NSAttributedString。您需要设置段落样式的行间距：

You're on the right track with NSAttributedString. You need to set the line spacing of the paragraph style:

    let paragraphStyle = NSMutableParagraphStyle()
    paragraphStyle.lineSpacing = 30 // Whatever line spacing you want in points
    attributedString.addAttribute(NSParagraphStyleAttributeName, value:paragraphStyle, range:NSMakeRange(0, attributedString.length))
    label.attributedText = attributedString;

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