removing white spaces at beginning and end of string

Question

I've got a problem with removing whitespaces at the beginning and end of string. For e.g. I've got a string like:

\r\n\t- Someone will come here?\n- I don't know for sure...\r\n\r\n

And I need to remove whitespaces only at the end and beginning (string should be look like: - Someone will come here?\n- I don't know for sure... Also there could be a lot of variants of string end: "\r\n\r\n", "\r\n", "\n\r\n" and so on...

Thanks.

Possible duplicate of [Does swift has trim method on String?](http://stackoverflow.com/questions/26797739/does-swift-has-trim-method-on-string) — Eric Aya, Nov 02 '15 at 12:34

vadian · Accepted Answer · 2017-04-13T11:30:17.543

21

Your string contains not only whitespace but also new line characters.

Use stringByTrimmingCharactersInSet with whitespaceAndNewlineCharacterSet.

let string = "\r\n\t- Someone will come here?\n- I don't know for sure...\r\n\r\n"
let trimmedString = string.stringByTrimmingCharactersInSet(NSCharacterSet.whitespaceAndNewlineCharacterSet())

In Swift 3 it's more cleaned up:

let trimmedString = string.trimmingCharacters(in: .whitespacesAndNewlines)

edited Apr 13 '17 at 11:30

answered Nov 02 '15 at 08:55

vadian

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well, this one is works with example so far, will try with other data. thank you – Denis Rumiantsev Nov 02 '15 at 09:09
Thanks ! So easy! :) – Swifty Codes Jul 21 '17 at 11:50

Rafat touqir Rafsun · Answer 2 · 2017-10-04T13:05:41.520

5

String trimming first and last whitespaces and newlines in Swift 4+

"  2 space  ".trimmingCharacters(in: .whitespacesAndNewlines)

result: "2 space"

edited Oct 04 '17 at 13:05

answered Apr 13 '17 at 11:26

Rafat touqir Rafsun

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score 3 · Answer 3 · answered Nov 02 '15 at 09:10

//here i have used regular expression and replaced white spaces at the start and end
      let stringPassing : NSString? = "hdfjkhsdj hfjksdhf sdf "
      do {
        print("old->\(stringPassing)")
        let pattern : String = "(^\\s+)|(\\s+)$"
        let regex = try NSRegularExpression(pattern: pattern , options: [])
        let newMatched = regex.matchesInString(stringPassing! as String, options: [], range: NSMakeRange(0,stringPassing!.length))
        if(newMatched.count > 0){

          let modifiedString = regex.stringByReplacingMatchesInString(stringPassing! as String, options: [] , range: NSMakeRange(0,stringPassing!.length), withTemplate: "")
              print("new->\(modifiedString)")
        }

    } catch let error as NSError {
        print(error.localizedDescription)
    }

score 2 · Answer 4 · answered Nov 02 '15 at 09:06

2

You can use this extension and just call "yourString".trim()

extension String
{
    func trim() -> String
    {
        return self.stringByTrimmingCharactersInSet(NSCharacterSet.whitespaceAndNewlineCharacterSet())
    }
}

answered Nov 02 '15 at 09:06

Omkar Guhilot

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score 1 · Answer 5 · answered Jul 14 '21 at 09:49

If you want to remove Whitespace from the start of the string Try this Code.

func removeSpace()->String{
    let txt = myString
    var count:Int! = 0
    for i in txt{
        if i  == " "{
            count += 1
        }else{
            if count != 0{
                return String(txt.dropFirst(count))
            }else{
                return txt
            }
        }
    }
    return ""
}

`

score 1 · Answer 6 · edited Jul 14 '21 at 11:04

1

Remove all whiteSpaces from the start of string

func removeWhiteSpaces(str:String) -> String{
    var newStr = str
    for i in 0..<str.count{
        let index = str.index(str.startIndex, offsetBy: i)
        print(str[index])
        if str[index] != " "{
            return newStr
        }
        else{
            newStr.remove(at: newStr.startIndex)
        }
    }
    return newStr
}

edited Jul 14 '21 at 11:04

Slava Rozhnev

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answered Jul 14 '21 at 10:24

M.Usman Asghar

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score -1 · Answer 7 · answered Jul 25 '18 at 19:33

In this code to restrict Textfield beginning white space

func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
        if (textField.text?.count)! == 0 && string == " " {
            return false
        }
        else{
            return true
        }
    }

score -1 · Answer 8 · answered Sep 18 '18 at 16:00

In Swift 4 Use it on any String type variable.

extension String {
    func trimWhiteSpaces() -> String {
        let whiteSpaceSet = NSCharacterSet.whitespaces
        return self.trimmingCharacters(in: whiteSpaceSet)
    }
}

And Call it like this

yourString.trimWhiteSpaces()

score -2 · Answer 9 · answered Nov 02 '15 at 08:55

-2

You could first remove from the beginning and then from the end like so:

while true {
if sentence.characters.first == "\r\n" || sentence.characters.first == "\n" {
    sentence.removeAtIndex(sentence.startIndex)
} else {
    break
}
}

while true {
if sentence.characters.last == "\r\n" || sentence.characters.last == "\n" {
    sentence.removeAtIndex(sentence.endIndex.predecessor())
} else {
    break
}
}

answered Nov 02 '15 at 08:55

Alexander Li

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1

I bet this is not a good idea to use while-true loop for such problem. By the way, string ending/beginning could be different. There are a lot of cases, and write all them down - also not good idea, as I think. – Denis Rumiantsev Nov 02 '15 at 09:00
It breaks out of the loop once all of the spaces are removed (any combination of \n and \r\n. It will always trim the white spaces (and new lines) at the beginning and end ONLY. You should at least try it before down voting it. – Alexander Li Nov 02 '15 at 09:08

score -2 · Answer 10 · edited Aug 02 '17 at 06:26

-2

let string = " exam ple "

let trimmed = string.replacingOccurrences(of: "(^\s+)|(\s+)$", with: "", options: .regularExpression)

print(">" + trimmed3 + "<")

// prints >exam ple<

edited Aug 02 '17 at 06:26

PEHLAJ

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9
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answered Aug 02 '17 at 06:01

Chandra Sekhar Y

1
2

removing white spaces at beginning and end of string

10 Answers10