currency formatter swift 3

Question

I am trying to format the textfield's input in currency standard format using its delegate method but the found solution is not upto the desire. I also found some solutions but nowhere i found the expected solution.

Requirements:

UITextField's Input: 300000

Getting: 30,0000

Desired Output: 300,000

Using code:

//MARK:- textfield delegate method
func textField(_ textField: UITextField, shouldChangeCharactersIn range:NSRange, replacementString string: String) -> Bool {
    
    guard let textFieldHasText = (textField.text), !textFieldHasText.isEmpty else {
        //early escape if nil
        return true
    }
    
    if textField == self.reqCourps || textField == self.presentInvest{
        let formatter = NumberFormatter()
        formatter.numberStyle = .decimal
        
        //remove any existing commas
        let textRemovedCommma = textFieldHasText.replacingOccurrences(of: ",", with: "")
        
        //update the textField with commas
        let formattedNum = formatter.string(from: NSNumber(value: Int(textRemovedCommma)!))
        
        textField.text = formattedNum
    }
    
    
    guard let text = textField.text else { return true }
    let newLength = text.characters.count + string.characters.count - range.length
    return newLength <= 12 // Bool
    
}

When i use .currency method it crashes the app also:

formatter.numberStyle = .currency

Check this out: http://stackoverflow.com/questions/24960621/struggling-with-nsnumberformatter-in-swift-for-currency — d4Rk, Apr 24 '17 at 07:42
Add `return false` after `textField.text = formattedNum`. You should also remove all non-integer characters. — Sulthan, Apr 24 '17 at 07:47
@Sulthan, by adding `return false after textField.text = formattedNum` i wont be able to edit textfield. — vaibhav, Apr 24 '17 at 07:51
@vaibhav Well, do you understand that if you change the text and then you let the textfield to change the text again, you won't get the desired behavior? — Sulthan, Apr 24 '17 at 08:00
@vaibhav you want to convert your number into US currency right ? — Himanshu Moradiya, Apr 24 '17 at 09:16
@HimanshuMoradiya, the ans you delivered which i was already using by sending whole string to apply currency sign and comma, but this time i am separating number using comma while enter in uitextfield see ques again. — vaibhav, Apr 24 '17 at 09:29

score 2 · Answer 1 · 2017-04-24T09:15:44.613

2

Here is code

func getNumberWithFormat(_ number : NSNumber, format : String) -> String {
     let numberFormatter = NumberFormatter()
     numberFormatter.locale = Locale.current
     numberFormatter.numberStyle = NumberFormatter.Style.decimal
     numberFormatter.usesGroupingSeparator = true

     numberFormatter.positiveFormat = format
     return numberFormatter.string(from: number)! 
}

You can call this function like,

let number : NSNumber = 300000 
print("Number is : ", getNumberWithFormat(number, format: "###,###"))

Your output will be

Number is :  300,000

edited Apr 24 '17 at 09:15

answered Apr 24 '17 at 07:42

let me see ..wait plz. – vaibhav Apr 24 '17 at 07:49
can you please deliver me an ans which is directly passing textfild's value to above method, not static. – vaibhav Apr 24 '17 at 08:06
you can pass your textfield value to that function. For that you need to typecast your textfield.text to NSNumber. – Apr 24 '17 at 08:34
thanks it helped me to convert into comma system – user1090751 Jul 17 '21 at 14:20

score 0 · Answer 2 · edited Apr 24 '17 at 09:20

0

I think this is due to your locale settings. In some areas of the world, they have number formats like that. I tested your code and it worked fine, so I guess there must be something with wrong with your locale.

If you want the number to be in the US style, just set the locale explicitly:

// here pass your textfield value that you want to convert into doller.

 let price = NSDecimalNumber(string: self.textfield.text) as NSNumber
 let formatter = NumberFormatter()
 formatter.numberStyle = .currency
 formatter.locale = Locale(identifier: "en_US")
 formatter.string(from: price)
 print(formatter.string(from: price)!)

Output:

$8,965.00

edited Apr 24 '17 at 09:20

Himanshu Moradiya

4,769
4
25
49

answered Apr 24 '17 at 07:45

Sweeper

213,210
22
193
313

if you talking about `.currency` let me check. – vaibhav Apr 24 '17 at 07:48
if i set `Locale` with `.currency`, still crashes application. – vaibhav Apr 24 '17 at 07:53
its unexpectedly found nil, it seems when adding `formatter.numberStyle = .currency` with setting `Locale`. – vaibhav Apr 24 '17 at 07:55
@vaibhav that _is_ weird... I don't know what happened then. – Sweeper Apr 24 '17 at 08:00
I also dont know if you using the same code which i a using then why it crashes my app. – vaibhav Apr 24 '17 at 08:03

score 0 · Answer 3 · answered Apr 24 '17 at 07:53

import UIKit

open class DecimalFormatter: NumberFormatter {

    public override init() {
        super.init()
        locale = Locale.current
        numberStyle = .decimal
        minimumFractionDigits = 2
        maximumFractionDigits = 2
    }

    required public init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    override open func getObjectValue(_ obj: AutoreleasingUnsafeMutablePointer<AnyObject?>?, for string: String, range rangep: UnsafeMutablePointer<NSRange>?) throws {
        guard obj != nil else { return  }
        let str = string.components(separatedBy: CharacterSet.decimalDigits.inverted).joined(separator: "")
        obj?.pointee = NSNumber(value: (Double(str) ?? 0.0)/Double(pow(10.0, Double(minimumFractionDigits))))
    }
}


let originString = NSNumber.init(value: 30000)
let result = DecimalFormatter().string(from: originString)

you will get 30,000.00 if u want get 30,000, just change "minimumFractionDigits" to "0"

currency formatter swift 3

3 Answers3