Saving decimal and currency in Core Data

时间：2022-05-14 16:31:53

Is it possible to save numbers with grouping separators and currency into core data and if so can someone point me in the right direction.

是否可以通过将分隔符和货币分组到核心数据来保存数字,如果是这样,有人可以指出我正确的方向。

I have mile.text which is a decimal number with the grouping separator, payPerMile.text which is currency and then the grossPay.text which is also currency.

我有mile.text这是一个带分组分隔符的十进制数字,payPerMile.text是货币,然后是grossPay.text,它也是货币。

Everything calculates and displays fine until I save it. I print the numbers when I save, everything after the grouping separator is gone and the currency lines display as NaN.

一切都计算并显示正常,直到我保存。我保存时打印数字,分组分隔符后的所有内容都消失,货币行显示为NaN。

@IBAction func save(_ sender: UIButton) {

    if let item = item {

        item.startdate = startDate.text
        item.unitnumber = unitNumber.text
        item.miles = NSDecimalNumber(string: miles.text ?? "0.0")
        item.paypermile = NSDecimalNumber(string: payPerMile.text ?? "0.00")
        item.grosspay = NSDecimalNumber(string: grossPay.text ?? "0.00")
        item.company = company.text
        item.destination = destination.text
        item.enddate = endDate.text

    } else if let entitydescription = NSEntityDescription.entity(forEntityName: "DriveAwayMain", in: pc) {

        let item = DriveAwayMain(entity: entitydescription, insertInto: pc)

        item.startdate = startDate.text
        item.unitnumber = unitNumber.text
        item.miles = NSDecimalNumber(string: miles.text ?? "0.0")
        item.paypermile = NSDecimalNumber(string: payPerMile.text ?? "0.00")
        item.grosspay = NSDecimalNumber(string: grossPay.text ?? "0.00")
        item.company = company.text
        item.destination = destination.text
        item.enddate = endDate.text

    }

1 个解决方案

#1

0  

NSDecimalNumber(string:) only accepts plain numbers, not formatted numbers. If the user is entering formatted currency values then you need to use a NumberFormatter in .currency mode to parse the string into a number.

NSDecimalNumber(string :)只接受普通数字,而不是格式化数字。如果用户输入格式化的货币值,则需要在.currency模式下使用NumberFormatter将字符串解析为数字。

Example:

print(NSDecimalNumber(string: "$4,560.45"))

Output:

NaN

Using a NumberFormatter:

使用NumberFormatter:

let curFmt = NumberFormatter()
curFmt.generatesDecimalNumbers = true
curFmt.numberStyle = .currency
if let num = curFmt.number(from: "$4,560.45") {
    print(num)
} else {
    print("Not valid currency number")
}

Output:

4560.45

#1

0  

NSDecimalNumber(string:) only accepts plain numbers, not formatted numbers. If the user is entering formatted currency values then you need to use a NumberFormatter in .currency mode to parse the string into a number.

NSDecimalNumber(string :)只接受普通数字,而不是格式化数字。如果用户输入格式化的货币值,则需要在.currency模式下使用NumberFormatter将字符串解析为数字。

Example:

print(NSDecimalNumber(string: "$4,560.45"))

Output:

NaN

Using a NumberFormatter:

使用NumberFormatter:

let curFmt = NumberFormatter()
curFmt.generatesDecimalNumbers = true
curFmt.numberStyle = .currency
if let num = curFmt.number(from: "$4,560.45") {
    print(num)
} else {
    print("Not valid currency number")
}

Output:

4560.45

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