如何在swift中将阿拉伯数字转换为英文数字？

您需要先将阿拉伯数字字符串转换为英语,然后执行计算部分.

    let numberStr: String = "????????"
    let formatter: NumberFormatter = NumberFormatter()
    formatter.locale = NSLocale(localeIdentifier: "EN") as Locale!
    let final = formatter.number(from: numberStr)
    let doubleNumber = Double(final!)
    print("\(doubleNumber)")