有没有办法摆脱截断标签中的省略号？

Question

在lineBreakingMode设置为ByTruncatingHead或ByTruncatingTail的标签中是否有一种摆脱省略号（...）的Swift方式？

我遇到Obj-C方式试图将其转换为快速但无效（我失败了）。 非常感谢任何帮助或提示。

这是我的转换：

private func replaceElipses() {
        let origSize = self.frame
        let useWidth = origSize.size.width

        self.sizeToFit()

        let labelSize = (self.text! as NSString).sizeWithAttributes([NSFontAttributeName: self.font])

        if labelSize.width > useWidth {
            original = self.text!
            truncateWidth = useWidth
            systemfont = self.font
            subLength = (self.text?.characters.count)!

            var temp = ((self.text)! as NSString).substringToIndex(self.text!.characters.count-1) as NSString
            temp = temp.substringToIndex(self.getTruncatedStringPoint(subLength))
            temp = "\(temp)\("@")"

            var count = 0
            while (self.text! as NSString).sizeWithAttributes([NSFontAttributeName: self.font]).width > useWidth {
                count++
                temp = ((self.text)! as NSString).substringToIndex(self.text!.characters.count-(1+count)) as NSString
                temp = "\(temp)\("@")"
            }
            self.text = temp as String
            self.frame = origSize

        } else {
            self.frame = origSize
        }
    }

    func getTruncatedStringPoint(splitPoint: Int) -> Int {
        let splitLeft = original.substringToIndex(splitPoint) as NSString
        subLength /= 2

        if subLength <= 0 {
            return splitPoint
        } else if splitLeft.sizeWithAttributes([NSFontAttributeName: systemfont]).width > truncateWidth {
            return self.getTruncatedStringPoint(splitPoint - subLength)
        } else if splitLeft.sizeWithAttributes([NSFontAttributeName: systemfont]).width < truncateWidth {
            return self.getTruncatedStringPoint(splitPoint + subLength)
        } else {
            return splitPoint
        }
    }