ios – 归因于两个文本对齐的文本

这就是我想要textView显示的内容：

label                                                                         value

我的代码：

let txtView = cell.viewWithTag(77) as! UITextView

let leftStyle = NSMutableParagraphStyle()
leftStyle.alignment = NSTextAlignment.Left
let rightStyle = NSMutableParagraphStyle()
rightStyle.alignment = NSTextAlignment.Right

let attText = NSMutableAttributedString(string: "label",attributes: [NSParagraphStyleAttributeName: leftStyle])
attText.appendAttributedString(NSAttributedString(string: " "))
attText.appendAttributedString(NSAttributedString(string: "value",attributes: [NSParagraphStyleAttributeName: rightStyle]))

txtView.attributedText = attText

我得到的是：

label value

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