How should I remove all the leading spaces from a string - swift

Question

I need a way to remove the first character from a string which is a space  I am looking for a method or even an extension for the String type that I can use to cut out a character of a string

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Swift 3  You can simply use this method to remove all normal spaces in a string  doesn t consider all types of whitespace      let myString     Hello World     let formattedString   myString replacingOccurrences of       with        The result will be   HelloWorld

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This String extension removes all whitespace from a string  not just trailing whitespace       extension String       func replace string String  replacement String  - gt  String           return self replacingOccurrences of  string  with  replacement  options  NSString CompareOptions literal  range  nil             func removeWhitespace   - gt  String           return self replace string       replacement                  Example   let string    The quick brown dog jumps over the foxy lady   let result   string removeWhitespace      Thequickbrowndogjumpsoverthefoxylady

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Yet another answer  sometimes the input string can contain more than one space between words  If you need to standardize to have only 1 space between words  try this  Swift 4 5   let inputString      a very     strange   text        let validInput   inputString components separatedBy  whitespacesAndNewlines  filter    0 count  gt  0   joined separator        print validInput      a very strange text

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Swift 3 version      This function trim only white space     func trim   - gt  String                       return self trimmingCharacters in  CharacterSet whitespaces                  This function trim whitespeaces and new line that you enter       func trimWhiteSpaceAndNewLine   - gt  String                       return self trimmingCharacters in  CharacterSet whitespacesAndNewlines

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You can also use regex   let trimmedString   myString stringByReplacingOccurrencesOfString    s   withString      options  NSStringCompareOptions RegularExpressionSearch  range  nil

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I d use this extension  to be flexible and mimic how other collections do it   extension String       func filter pred  Character - gt  Bool  - gt  String           var res   String           for c in self characters               if pred c                    res append c                                  return res           this is a String  filter    0    Character            thisisaString

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Swift 4  4 2 and 5  Remove space from front and end only  let str      Akbar Code    let trimmedString   str trimmingCharacters in   whitespacesAndNewlines    Remove spaces from every where in the string  let stringWithSpaces     The Akbar khan code   let stringWithoutSpaces   stringWithSpaces replacingOccurrences of       with

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The correct way when you want to remove all kinds of whitespaces  based on this SO answer  is   extension String       var stringByRemovingWhitespaces  String           let components   componentsSeparatedByCharactersInSet  whitespaceCharacterSet            return components joinWithSeparator               Swift 3 0   3 0  3 1  3 2  4 0   extension String       func removingWhitespaces   - gt  String           return components separatedBy   whitespaces  joined             EDIT  This answer was posted when the question was about removing all whitespaces  the question was edited to only mention leading whitespaces  If you only want to remove leading whitespaces use the following   extension String       func removingLeadingSpaces   - gt  String           guard let index   firstIndex where     CharacterSet charactersIn  String  0   isSubset of   whitespaces     else               return self                   return String self index

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You can try This as well     let updatedString   searchedText  stringByReplacingOccurrencesOfString      withString   -

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To remove leading and trailing whitespaces   let trimmedString   string stringByTrimmingCharactersInSet NSCharacterSet whitespaceCharacterSet      Swift 3   Swift 4   let trimmedString   string trimmingCharacters in   whitespaces

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For Swift 3 0  see the other answers  This is now a legacy answer for Swift 2 x  As answered above  since you are interested in removing the first character the  stringByTrimmingCharactersInSet   instance method will work nicely   myString stringByTrimmingCharactersInSet NSCharacterSet whitespaceCharacterSet      You can also make your own character sets to trim the boundaries of your strings by  ex   myString stringByTrimmingCharactersInSet NSCharacterSet charactersInString    lt  gt       There is also a built in instance method to deal with removing or replacing substrings called stringByReplacingOccurrencesOfString target  String  replacement  String   It can remove spaces or any other patterns that occur anywhere in your string  You can specify options and ranges  but don t need to   myString stringByReplacingOccurrencesOfString      withString        This is an easy way to remove or replace any repeating pattern of characters in your string  and can be chained  although each time through it has to take another pass through your entire string  decreasing efficiency  So you can do this    myString stringByReplacingOccurrencesOfString      withString      stringByReplacingOccurrencesOfString      withString           but it will take twice as long    stringByReplacingOccurrencesOfString    documentation from Apple site  Chaining these String instance methods can sometimes be very convenient for one off conversions  for example if you want to convert a short NSData blob to a hex string without spaces in one line  you can do this with Swift s built in String interpolation and some trimming and replacing       myNSDataBlob    stringByTrimmingCharactersInSet NSCharacterSet charactersInString    lt  gt     stringByReplacingOccurrencesOfString      withString

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Swift 3 version of BadmintonCat s answer  extension String       func replace   string String  replacement String  - gt  String           return self replacingOccurrences of  string  with  replacement  options  NSString CompareOptions literal  range  nil             func removeWhitespace   - gt  String           return self replace      replacement

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For me  the following line used to remove white space   let result   String yourString filter           t     n   contains  0

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Try functional programming to remove white spaces   extension String     func whiteSpacesRemoved   - gt  String       return self filter    0    Character

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If you are wanting to remove spaces from the front  and back  but not the middle  you should use stringByTrimmingCharactersInSet      let dirtyString       First Word       let cleanString   dirtyString stringByTrimmingCharactersInSet NSCharacterSet whitespaceCharacterSet      If you want to remove spaces from anywhere in the string  then you might want to look at stringByReplacing

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To remove all spaces from the string   let space removed string    yourstring  components separatedBy       joined separator

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For anyone looking for an answer to remove only the leading whitespaces out of a string  as the question title clearly ask   Here s an answer  Assuming  let string    quot    Hello  World     quot   To remove all leading whitespaces  use the following code  var filtered    quot  quot  var isLeading   true for character in string       if character isWhitespace  amp  amp  isLeading           continue       else           isLeading   false         filtered append character          print filtered      quot Hello  World     quot   I m sure there s better code than this  but it does the job for me

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If anybody remove extra space from string e g     This is     the demo    text  remove    extra  space   between the   words    You can use this Function in Swift 4   func removeSpace   string  String  - gt  String      var str  String   String string string startIndex       for  index value  in string enumerated            if index  gt  0              let indexBefore   string index before  String Index init encodedOffset  index               if value         amp  amp  string indexBefore                       else                  str append value                                    return str     and result will be    This is the demo text remove extra space between the words

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Hi this might be late but worth trying  This is from a playground file  You can make it a String extension  This is written in Swift 5 3 Method 1  var str    quot  n  tHello  playground        quot  if let regexp   try  NSRegularExpression pattern   quot    s  quot   options  NSRegularExpression Options caseInsensitive        let mstr   NSMutableString string  str      regexp replaceMatches in  mstr  options      range  NSRange location  0  length  str count   withTemplate   quot  quot       str   mstr as String    Result   quot Hello  playground        quot   Method 2  if let c    str first      0     quot   quot      0     quot  t quot      0     quot  n quot            if let nonWhiteSpaceIndex   str firstIndex of  c            str replaceSubrange str startIndex    lt  nonWhiteSpaceIndex  with   quot  quot            Result   quot Hello  playground        quot

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extension String        var removingWhitespaceAndNewLines  String           return removing  whitespacesAndNewlines             func removing   forbiddenCharacters  CharacterSet  - gt  String           return String unicodeScalars filter    forbiddenCharacters contains  0

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string   string filter        contains  0

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Trimming white spaces in Swift 4  let strFirstName   txtFirstName text  trimmingCharacters in    CharacterSet whitespaces

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Swift 4  The excellent case to use the regex     this is    wrong contained teee xt            replacingOccurrences of      s    s    s                                with                                 options   regularExpression      thisiswrongcontainedteeext

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class SpaceRemover       func SpaceRemover str  String - gt String               var array   Array str          var i   array count         while array last                               var array1    Character                for item in  0   i - 1                               array1 append array item                             i   i - 1             array   array1             print array1              print array                      var arraySecond   array         var j   arraySecond count          while arraySecond first                               var array2    Character                if j  gt  1                               for item in 1   lt j                                       array2 append arraySecond item                                               j   j - 1             arraySecond   array2             print array2              print arraySecond                     print arraySecond          return String arraySecond

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For swift 3 0  import Foundation  var str     Hear me calling   extension String       var stringByRemovingWhitespaces  String           return components separatedBy   whitespaces  joined            str stringByRemovingWhitespaces     Hearmecalling

[string] How should I remove all the leading spaces from a string? - swift

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