Trim spaces from end of a NSString

Question

I need to remove spaces from the end of a string  How can I do that  Example  if string is  Hello      it must become  Hello

User · Accepted Answer

Taken from this answer here  https   stackoverflow com a 5691567 251012  -  NSString   stringByTrimmingTrailingCharactersInSet  NSCharacterSet   characterSet       NSRange rangeOfLastWantedCharacter    self rangeOfCharacterFromSet  characterSet invertedSet                                                                 options NSBackwardsSearch       if  rangeOfLastWantedCharacter location    NSNotFound            return                return  self substringToIndex rangeOfLastWantedCharacter location 1      non-inclusive

User · Answer

To trim all trailing whitespace characters  I m guessing that is actually your intent   the following is a pretty clean  amp  concise way to do it   Swift 5   let trimmedString   string replacingOccurrences of     s     with      options   regularExpression    Objective-C   NSString  trimmedString    string stringByReplacingOccurrencesOfString     s    withString     options NSRegularExpressionSearch range NSMakeRange 0  string length      One line  with a dash of regex

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In Swift  To trim space  amp  newline from both side of the String   var url  String     n   http   example com xyz mp4     var trimmedUrl  String   url stringByTrimmingCharactersInSet NSCharacterSet whitespaceAndNewlineCharacterSet

User · Answer

NSString  NSStringWithoutSpace NSString  string        return  string stringByReplacingOccurrencesOfString      withString

User · Answer

The solution is described here  How to remove whitespace from right end of NSString   Add the following categories to NSString   -  NSString   stringByTrimmingTrailingCharactersInSet  NSCharacterSet   characterSet       NSRange rangeOfLastWantedCharacter    self rangeOfCharacterFromSet  characterSet invertedSet                                                                 options NSBackwardsSearch       if  rangeOfLastWantedCharacter location    NSNotFound            return                return  self substringToIndex rangeOfLastWantedCharacter location 1      non-inclusive    -  NSString   stringByTrimmingTrailingWhitespaceAndNewlineCharacters       return  self stringByTrimmingTrailingCharactersInSet               NSCharacterSet whitespaceAndNewlineCharacterSet        And you use it as such    yourNSString stringByTrimmingTrailingWhitespaceAndNewlineCharacters

User · Answer

To remove whitespace from only the beginning and end of a string in Swift   Swift 3  string trimmingCharacters in   whitespacesAndNewlines    Previous Swift Versions  string stringByTrimmingCharactersInSet  whitespaceAndNewlineCharacterSet

User · Answer

Here you go     -  NSString   removeEndSpaceFrom  NSString   strtoremove      NSUInteger location   0      unichar charBuffer  strtoremove length         strtoremove getCharacters charBuffer       int i   0      for i    strtoremove length   i  gt 0  i--            NSCharacterSet  charSet    NSCharacterSet whitespaceCharacterSet           if   charSet characterIsMember charBuffer i - 1                  break                      return  strtoremove substringWithRange NSMakeRange location  i  - location        So now just call it  Supposing you have a string that has spaces on the front and spaces on the end and you just want to remove the spaces on the end  you can call it like this   NSString  oneTwoThree       TestString      NSString  resultString  resultString    self removeEndSpaceFrom oneTwoThree     resultString will then have no spaces at the end

User · Answer

I came up with this function  which basically behaves similarly to one in the answer by Alex   - NSString  trimLastSpace  NSString  str      int i   str length - 1      for    i  gt   0  amp  amp   str characterAtIndex i          i--       return  str substringToIndex i   1       whitespaceCharacterSet besides space itself includes also tab character  which in my case could not appear  So i guess a plain comparison could suffice

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Swift version  Only trims spaces at the end of the String   private func removingSpacesAtTheEndOfAString var str  String  - gt  String       var i  Int   countElements str  - 1  j  Int   i      while i  gt   0  amp  amp  str advance str startIndex  i                     --i            return str substringWithRange Range lt String Index gt  start  str startIndex  end  advance str endIndex  - j - i         Trims spaces on both sides of the String   var str  String     Yolo   var trimmedStr  String   str stringByTrimmingCharactersInSet NSCharacterSet whitespaceCharacterSet

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NSString  trimmedString    string stringByTrimmingCharactersInSet                                 NSCharacterSet whitespaceAndNewlineCharacterSet      for remove whitespace and new line character  NSString  trimmedString    string stringByTrimmingCharactersInSet                                 NSCharacterSet punctuationCharacterSet       for remove characters in punctuation category   There are many other CharacterSets  Check it yourself as per your requirement

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Another solution involves creating mutable string     make mutable string NSMutableString  stringToTrim       i needz trim   mutableCopy      pass it by reference to CFStringTrimSpace CFStringTrimWhiteSpace    bridge CFMutableStringRef  stringToTrim      stringToTrim is now  i needz trim

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This will remove only the trailing characters of your choice   func trimRight theString  String  charSet  NSCharacterSet  - gt  String        var newString   theString      while String newString characters last  rangeOfCharacterFromSet charSet     nil           newString   String newString characters dropLast               return newString

User · Answer

A simple solution to only trim one end instead of both ends in Objective-C    implementation NSString  category       trims the characters at the end -  NSString   stringByTrimmingSuffixCharactersInSet  NSCharacterSet   characterSet       NSUInteger i   self length      while  i  gt  0  amp  amp   characterSet characterIsMember  self characterAtIndex i - 1              i--            return  self substringToIndex i       end   And a symmetrical utility for trimming the beginning only    implementation NSString  category       trims the characters at the beginning -  NSString   stringByTrimmingPrefixCharactersInSet  NSCharacterSet   characterSet       NSUInteger i   0      while  i  lt  self length  amp  amp   characterSet characterIsMember  self characterAtIndex i              i              return  self substringFromIndex i       end

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let string     Test Trimmed String    For Removing white Space and New line use below code  -  let str trimmed   yourString trimmingCharacters in   whitespacesAndNewlines   For Removing only Spaces from string use below code  -  let str trimmed   yourString trimmingCharacters in   whitespaces

[nsstring] Trim spaces from end of a NSString

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Examples related to whitespace

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