Question

我想使用属性字符串更改UILabel中标签的默认宽度。我怎样才能做到这一点？我假设我应该添加属性NSMutableParagraphStyle，但我不知道哪个属性负责标签长度。

我们以此代码为例：

let text = "test\ttest"
let attributedText = NSMutableAttributedString(string: text)
let paragraphStyle = NSMutableParagraphStyle()
let textRange = NSRange(location: 0, length: text.length)
attributedText.addAttribute(NSAttributedStringKey.paragraphStyle, value: paragraphStyle, range: textRange)

Answer 1

根据Apple Developer Documentation，var tabStops: [NSTextTab]!是一个NSTextTab个对象数组，表示接收者的制表位。您可以按如下方式访问标签并更改其位置：

let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.tabStops = [NSTextTab(textAlignment: .left, location: newTabLength, options: [:])]

label.attributedText = NSAttributedString(string: text, attributes: [NSParagraphStyleAttributeName: paragraphStyle])

Answer 2

要通过NSMutableParagraphStyle更改tabstops的长度，您必须创建一个新的NSTextTab个实例数组并将其分配给tabStops数组

let text = "test\ttest\ttest"
let attributedText = NSMutableAttributedString(string: text)
let paragraphStyle = NSMutableParagraphStyle()
let tabInterval : CGFloat = 40.0
var tabs = [NSTextTab]()
for i in 1...10 { tabs.append(NSTextTab(textAlignment: .left, location: tabInterval * CGFloat(i))) }
paragraphStyle.tabStops = tabs
let textRange = NSRange(location: 0, length: text.count)
attributedText.addAttribute(NSAttributedStringKey.paragraphStyle, value: paragraphStyle, range: textRange)

Answer 3

您可以尝试将\ t替换为您想要的空格数

var text = "test\ttest"
text = text.replacingOccurrences(of: "\\t", with: " ")
let attributedText = NSMutableAttributedString(string: text)
let paragraphStyle = NSMutableParagraphStyle()
let textRange = NSRange(location: 0, length: text.length)
attributedText.addAttribute(NSAttributedStringKey.paragraphStyle, value: paragraphStyle, range: textRange)

如何在NSAttributedString中更改“\ t”长度？

3 个答案: