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iOS

Posted by Daniel Lambrecht
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Daniel Lambrecht
iOS Development Techdegree Student 5,302 Points

Swift: UITextfield --> double with comma as decimal seperator (0,7) instead of (0.7)

Hi, ive been trying to figure this thing out and google didnt have the answer so her goes!

im making a simple app to calculate some values.

Therefore the user needs to enter a value for instance it could be 1.65. I need this to be converted in to a double, which is almost working. besides it gives me the double 1.00.

It does this because in my country when we write the number it would be 1,65 - Swift then only uses the first number 1 and converts that to a double, leaving the rest.

I need a solution that gives the user the possibility to input something like 1,65 Giving me the Double value: 1.65

Can anyone help me with that?

kjvswift93
kjvswift93
13,515 Points

Where are you from?

1 Answer

David Papandrew
David Papandrew
8,386 Points

Check out the solutions on this stackoverflow post: http://stackoverflow.com/questions/28313871/swift-playground-how-to-convert-a-string-with-comma-to-a-string-with-decimal

For a quick and dirty solution, you could use the replacingOccurences string method (you need to import Foundation to access this) and then cast the string as a Double.

Something like this:

import Foundation
let commaValue = "8,35"
let decimalValue = Double(commaValue.replacingOccurrences(of: ",", with: "."))

But NSNumberFormatter (see stackoverflow link) is probably the better route. Good luck.

Daniel Lambrecht
.a{fill-rule:evenodd;}techdegree
Daniel Lambrecht
iOS Development Techdegree Student 5,302 Points

Wow thanks!