swift 去除小数点后面的0并1取有效位数

项目中有个需求是去掉小数点后面的0并取有效值，查找资料后修改完善如下

    //去掉小数点后面的0
    func quXiaoShuDianHouDeLing(numberString:String) -> String{
        var outNumber = numberString
        var i = 1

        if numberString.contains("."){
            while i < numberString.count{
                if outNumber.hasSuffix("0") {
                    outNumber.remove(at: outNumber.index(before: outNumber.endIndex))
                    i = i + 1
                } else {
                    break
                }
            }
            if outNumber.hasSuffix("."){
                outNumber.remove(at: outNumber.index(before: outNumber.endIndex))
            }
            return outNumber
        } else {
            return numberString
        }
    }

调用的话这样：

priceLabel.text = String(format: "折扣价：%@万元", quXiaoShuDianHouDeLing(numberString: model.amount))

后台返回是这种的：

后台返回