xcode - Xcode：有没有办法在界面生成器中更改行距（UI 标签）？

Question

我有几个带有多行文本的 UILabel，但行距比我希望的要大。有什么办法可以改变这个吗？

Answer 1

hi this is a late reply but it may help some one line height can be change change the text from plain to attribute

Answer 2

从 iOS 6 开始，Apple 加入NSAttributedString了UIKit，使得可以NSParagraphStyle用来改变行距。

要真正从 NIB 更改它，请参阅 souvickcse 的答案。

Answer 3

因为我讨厌在界面构建器中使用属性文本（我总是遇到 IB 错误），所以这里有一个扩展，允许您在界面构建器中直接将行高设置为 UILabel

extension UILabel {

    @IBInspectable
    var lineHeightMultiple: CGFloat {
        set{

            //get our existing style or make a new one
            let paragraphStyle: NSMutableParagraphStyle
            if let existingStyle = attributedText?.attribute(NSAttributedString.Key.paragraphStyle, at: 0, effectiveRange: .none) as? NSParagraphStyle, let mutableCopy = existingStyle.mutableCopy() as? NSMutableParagraphStyle  {
                paragraphStyle = mutableCopy
            } else {
                paragraphStyle = NSMutableParagraphStyle()
                paragraphStyle.lineSpacing = 1.0
                paragraphStyle.alignment = self.textAlignment
            }
            paragraphStyle.lineHeightMultiple = newValue

            //set our text from existing text
            let attrString = NSMutableAttributedString()
            if let text = self.text {
                attrString.append( NSMutableAttributedString(string: text))
                attrString.addAttribute(NSAttributedString.Key.font, value: self.font, range: NSMakeRange(0, attrString.length))
            }
            else if let attributedText = self.attributedText {
                attrString.append( attributedText)
            }

            //add our attributes and set the new text
            attrString.addAttribute(NSAttributedString.Key.paragraphStyle, value:paragraphStyle, range:NSMakeRange(0, attrString.length))
            self.attributedText = attrString
        }

        get {
            if let paragraphStyle = attributedText?.attribute(NSAttributedString.Key.paragraphStyle, at: 0, effectiveRange: .none) as? NSParagraphStyle {
                return paragraphStyle.lineHeightMultiple
            }
            return 0
        }
    }