如何在Swift中增加UILabel中的行间距

我有一个有几行文本的标签，我想增加行间的间距。 其他人也有类似的问题，但解决scheme并没有解决我的问题。 此外，我的标签可能包含或不包含段落。 我是Swift新手。 有使用故事板的解决scheme吗？ 还是只有通过NSAttributedstring它可能？

Answer 1

使用以下代码段，以编程方式将LineSpacing添加到您的UILabel 。

 let attributedString = NSMutableAttributedString(string: "Your text") // *** Create instance of `NSMutableParagraphStyle` let paragraphStyle = NSMutableParagraphStyle() // *** set LineSpacing property in points *** paragraphStyle.lineSpacing = 2 // Whatever line spacing you want in points // *** Apply attribute to string *** attributedString.addAttribute(NSParagraphStyleAttributeName, value:paragraphStyle, range:NSMakeRange(0, attributedString.length)) // *** Set Attributed String to your label *** label.attributedText = attributedString; 

Answer 2

您可以控制storyboard行距。

同样的问题。

Answer 3

从界面生成器：

编程方式：

SWIFT 4

使用标签扩展

 extension UILabel { func setLineSpacing(lineSpacing: CGFloat = 0.0, lineHeightMultiple: CGFloat = 0.0) { guard let labelText = self.text else { return } let paragraphStyle = NSMutableParagraphStyle() paragraphStyle.lineSpacing = lineSpacing paragraphStyle.lineHeightMultiple = lineHeightMultiple let attributedString:NSMutableAttributedString if let labelattributedText = self.attributedText { attributedString = NSMutableAttributedString(attributedString: labelattributedText) } else { attributedString = NSMutableAttributedString(string: labelText) } // Line spacing attribute attributedString.addAttribute(NSAttributedStringKey.paragraphStyle, value:paragraphStyle, range:NSMakeRange(0, attributedString.length)) self.attributedText = attributedString } } 

现在调用扩展function

 let label = UILabel() let stringValue = "Set\nUILabel\nline\nspacing" // Pass value for any one argument - lineSpacing or lineHeightMultiple label.setLineSpacing(lineSpacing: 2.0) . // try values 1.0 to 5.0 // or try lineHeightMultiple //label.setLineSpacing(lineHeightMultiple = 2.0) // try values 0.5 to 2.0 

或者使用标签实例（只需复制并执行此代码即可查看结果）

 let label = UILabel() let stringValue = "Set\nUILabel\nline\nspacing" let attrString = NSMutableAttributedString(string: stringValue) var style = NSMutableParagraphStyle() style.lineSpacing = 24 // change line spacing between paragraph like 36 or 48 style.minimumLineHeight = 20 // change line spacing between each line like 30 or 40 // Line spacing attribute attrString.addAttribute(NSAttributedStringKey.paragraphStyle, value: style, range: NSRange(location: 0, length: stringValue.characters.count)) // Character spacing attribute attrString.addAttribute(NSAttributedStringKey.kern, value: 2, range: NSMakeRange(0, attrString.length)) label.attributedText = attrString 

Swift 3

 let label = UILabel() let stringValue = "Set\nUILabel\nline\nspacing" let attrString = NSMutableAttributedString(string: stringValue) var style = NSMutableParagraphStyle() style.lineSpacing = 24 // change line spacing between paragraph like 36 or 48 style.minimumLineHeight = 20 // change line spacing between each line like 30 or 40 attrString.addAttribute(NSParagraphStyleAttributeName, value: style, range: NSRange(location: 0, length: stringValue.characters.count)) label.attributedText = attrString