CODEWITHSUNDEEP
iosswiftnsnumbernsnumberformatter
Oleksandr Matrosov
Oleksandr Matrosov

Reputation: 27113

Financial string to NSNumber NSNumberFormatter does not work for different region

I have a financial string with I want to cover to NSNumber. Before I faced the issue I did it like that:

extension String { 
 var rawNumber: NSNumber? {
        let formatter = NumberFormatter()
        formatter.numberStyle = .decimal
        return formatter.number(from: self)
    }
}

When I get the number from "5.7" it worked great on the simulator. Perhaps because of United States region.

But real device with another region failed to convert string "5.7" until I relaized that the problem with locale I use

So I forced locale a bit and changed the code to this:

extension String {
    
    var rawNumber: NSNumber? {
        let numberFormatter = NumberFormatter()
        numberFormatter.locale = Locale(identifier: "en_US")
        numberFormatter.numberStyle = .decimal
        return numberFormatter.number(from: self.replacingOccurrences(of: ",", with: "."))
    }

I need this number for feature calculation, for example for multiplying and etc. I use NSDecimalNumber for that purposes.

So now my code works. Not sure if it is good to force locale.

I tried to use numberFormatter.separator as dot and comma for different locale but it did not work for me.

So just forcing to Locale(identifier: "en_US") works and string can be converted to NSNnumber

I supposed if I will use different locales and different separators it will convert string to kind of NSNumber.double(5.7) whatever I used comma as separator or dot.

I've added needed if block to catch current local and depend on this I used different separators, but no luck.

So looks like Locale(identifier: "en_US") is only a solution here.

Upvotes: 1

Views: 396

Answers (0)

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