I have a NumberFormatter
which has a currency number style. I can successfully format my number to string. However, when I try to get number from string, It returns null. The problem occurs when string has grouping separator.
My formatter:
let groupingSeparator = "."
let decimalSeparator = ","
let formatter = NumberFormatter()
formatter.maximumIntegerDigits = 6
formatter.maximumFractionDigits = 2
formatter.minimumFractionDigits = 0
formatter.numberStyle = .currency
formatter.groupingSize = 3
formatter.groupingSeparator = groupingSeparator
formatter.currencyGroupingSeparator = groupingSeparator
formatter.usesGroupingSeparator = true
formatter.decimalSeparator = decimalSeparator
formatter.currencyDecimalSeparator = decimalSeparator
formatter.currencySymbol = viewModel?.currency?.symbol ?? ""
How I try to get number from string:
if let number = amountFormatter.number(from: currentInput) {
text = amountFormatter.string(from: number)
}
Working Texts:
$1459
$2345,23
Not working Texts:
$1.459
$2.333,49
I suspect that your let constant groupingSeparator
is empty. When I run the following code:
let groupingSeparator = "."
let formatter = NumberFormatter()
formatter.maximumIntegerDigits = 6
formatter.maximumFractionDigits = 2
formatter.minimumFractionDigits = 0
formatter.numberStyle = .currency
formatter.groupingSize = 3
formatter.groupingSeparator = groupingSeparator
formatter.currencyGroupingSeparator = groupingSeparator
formatter.usesGroupingSeparator = true
formatter.decimalSeparator = decimalSeparator
formatter.currencyDecimalSeparator = decimalSeparator
let strings = ["$1459",
"$2345,23",
"$1.459",
"$2.333,49"
]
strings.forEach { value in
let string = formatter.number(from: value)?.description ?? "nil"
print("Value for \"\(value)\" = \(string)")
}
I get the output
Value for "$1459" = 1459
Value for "$2345,23" = 2345.23
Value for "$1.459" = 1459
Value for "$2.333,49" = 2333.49
Exactly as expected.
(Note that I'm in the US, so the default output for NSNumber.description
uses a "." decimal separator.)
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