Remove white spaces from String after formatting

Question

I'm formatting a String from a UITextField with input type number : Example : If I have '10000', I format '10000' to have '10 000' String.

Problem : Later I need access to the Int value of this String, but when casting, I got an exception because the String is not well formatted to be casted as it contains spaces. (Example : Int("10 000") not working.)

So I want to remove spaces from the String before casting to Int, by using : myString.trimmingCharacters(in: .whitespaces) but the spaces are still here.

I'm using the following extension :

extension Formatter {
    static let withSeparator: NumberFormatter = {
        let formatter = NumberFormatter()
        formatter.groupingSeparator = " "
        formatter.numberStyle = .decimal
        return formatter
    }()
}

extension BinaryInteger {
    var formattedWithSeparator: String {
        return Formatter.withSeparator.string(for: self) ?? ""
    }
}

I also tried to retrieve the original NSNumber from my Formatter by doing :

print(Formatter.withSeparator.number(from: "10 000").intValue)

But result is nil too.

Any idea ?

because probably the `formatter` is different from the `myFormatter`, otherwise it works smoothly, and the integer value will be `10000` for the input string `"10 000"` – btw, _trimming_ trims the leading and tailing characters only. — holex, Mar 05 '18 at 14:52
Thank you, your first answer about `trimming` shows me the way. I needed `replacingOccurences(...)`to remove spaces, stupid error — AnthonyR, Mar 05 '18 at 15:02
@AnthonyR `Formatter.withSeparator.number(from: "10 000")?.intValue` prints `"Optional(10000)\n"` for me. Are you sure your string doesn't contain white spaces other than the grouping separator? — Leo Dabus, Mar 05 '18 at 15:10
I just checked, in fact yes : At the end of my `String` there was an additional space that breaked my formatter path, this is why my number formatter was not working on the strings I was using. — AnthonyR, Mar 05 '18 at 15:26
Please don't edit your solution into your question. Instead, post it as an answer. — Robert Columbia, Mar 05 '18 at 15:31

score 1 · Answer 1 · answered Mar 05 '18 at 15:14

myString.trimmingCharacters(in: .whitespaces) will remove spaces at begin and end of string, so you need to remove all spaces between characters by below code:

let newString = myString.replacingOccurrences(of: " ", with: "")

then convert newString to Int

Nico S. · Answer 2 · 2022-02-22T14:39:08.843

To remove leading and trailing whitespace:

let myString = "  It Is Wednesday My Dudes!   "

myString.trimmingCharacters(in: .whitespaces)

print(myString) //"It Is Wednesday My Dudes! "

To remove all whitespaces:

extension String {
    var whiteSpaceRemoved: String {
        replacingOccurrences(of: " ", with: "")
    }
}

let myString = "  It Is Wednesday My Dudes!   "

print(myString.whiteSpaceRemoved) //"ItIsWednesdayMyDudes!"

score 0 · Answer 3 · answered Mar 05 '18 at 15:41

0

Solved :

There was an additional space at the end of the strings I was using. E.g : "10 000 ", so the formatter path I was using was wrong.

answered Mar 05 '18 at 15:41

AnthonyR

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Remove white spaces from String after formatting

3 Answers3