CODEWITHSUNDEEP
swift
Trombone0904
Trombone0904

Reputation: 4258

swift decimal format to double format issue

I have a textfield where I can write the an decimal-keypad a value like 25.00 This value I save into CoreData (double format) => Double(txtField.text!)! It works !

On an device, which is set to "Germany", the value Wille be 25,00 But there I will get this error:

Fatal error: Unexpectedly found nil while unwrapping an Optional value

(swift 5)

Where is my mistake? Thanks !

Upvotes: 0

Views: 161

Answers (1)

David Pasztor
David Pasztor

Reputation: 54706

You need to use a NumberFormatter to parse the input from the text field. NumberFormatter correctly handles the different decimal separators used in different locales. The Double initialise accepting a String on the other hand does not handle decimal separators other than the decimal point.

NumberFormatter also defaults to the user's Locale, so you don't need to set its locale property when parsing user input.

let numberFormatter = NumberFormatter()
if let numericInput = numberFormatter.number(from: txtField.text!)?.doubleValue {
    // handle the `Double` value here
}

Upvotes: 1

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