如何返回格式值，从厘米到英尺英寸（213.4厘米到7'0英寸）

Question

我正在构建一个将cm转换为英尺-英寸的格式化程序。

这是我的代码：

struct LengthFormatters {
    static let imperialHeight: LengthFormatter = {
        let formatter = LengthFormatter()
        formatter.numberFormatter.roundingMode = NumberFormatter.RoundingMode.halfUp
        formatter.numberFormatter.maximumFractionDigits = 0
        formatter.isForPersonHeightUse = true
        formatter.unitStyle = .short
        return formatter
    }()
}

extension Measurement where UnitType : UnitLength {
    var heightOnFeetsAndInches: String? {
        guard let measurement = self as? Measurement<UnitLength> else {
            return nil
        }
        let meters = measurement.converted(to: .meters).value
        return LengthFormatters.imperialHeight.string(fromMeters: meters)
    }
}