Remove all whitespaces from NSString

Question

I ve been trying to get rid of the white spaces in an NSString  but none of the methods I ve tried worked    I have  this is a test  and I want to get  thisisatest    I ve used whitespaceCharacterSet  which is supposed to eliminate the white spaces   NSString  search    searchbar text stringByTrimmingCharactersInSet                              NSCharacterSet whitespaceCharacterSet      but I kept getting the same string with spaces  Any ideas

User · Answer

stringByReplacingOccurrencesOfString will replace all white space with in the string non only the starting and end

Use

[YourString stringByTrimmingCharactersInSet:[NSCharacterSet  whitespaceAndNewlineCharacterSet]]

User · Answer

I prefer using regex like this   NSString  myString     this is a test   NSString  myNewString    myString stringByReplacingOccurrencesOfString     s                                       withString                                             options NSRegularExpressionSearch                                           range NSMakeRange 0   myStringlength        myNewString will be   thisisatest      You can make yourself a category on NSString to make life even easier   -  NSString    removeAllWhitespace       return  self stringByReplacingOccurrencesOfString     s  withString                                                   options NSRegularExpressionSearch                                                 range NSMakeRange 0   self length          Here is a unit test method on it too   -  void  testRemoveAllWhitespace       NSString  testResult   nil       NSArray  testStringsArray                                                                                                                basicTest                                                    another Test  n                                              a b c d e f g                                               n tA t t  t  nB     f  C  t   d  ve   F r r r                                                landscape  portrait         up side-down    asdf   lkjfasdf0qi4jr0213 ua    af             amp                                                                   NSArray  expectedResultsArray                                                                                                   basicTest                                             anotherTest                                             abcdefg                                             ABC d eF                                             landscape portrait    up side-down asdf lkjfasdf0qi4jr0213ua    af           amp                                                         for  int i 0  i  lt   testStringsArray count   i                  testResult    testStringsArray i  removeAllWhitespace           STAssertTrue  testResult isEqualToString expectedResultsArray i      Expected         to become          but result was                               testStringsArray i   expectedResultsArray i   testResult

User · Answer

stringByTrimmingCharactersInSet only removes characters from the beginning and the end of the string  not the ones in the middle   1  If you need to remove only a given character  say the space character  from your string  use    yourString stringByReplacingOccurrencesOfString      withString        2  If you really need to remove a set of characters  namely not only the space character  but any whitespace character like space  tab  unbreakable space  etc   you could split your string using the whitespaceCharacterSet then joining the words again in one string   NSArray  words    yourString componentsSeparatedByCharactersInSet   NSCharacterSet whitespaceAndNewlineCharacterSet    NSString  nospacestring    words componentsJoinedByString         Note that this last solution has the advantage of handling every whitespace character and not only spaces  but is a bit less efficient that the stringByReplacingOccurrencesOfString withString   So if you really only need to remove the space character and are sure you won t have any other whitespace character than the plain space char  use the first method

User · Answer

This may help you if you are experiencing  u00a0 in stead of     whitespace   I had this problem when I was trying to extract Device Contact Phone Numbers  I needed to modify the phoneNumber string so it has no whitespace in it   NSString  yourString    yourString stringByReplacingOccurrencesOfString    u00a0  withString         When yourString was the current phone number

User · Answer

Use below marco and remove the space    define TRIMWHITESPACE string   string stringByTrimmingCharactersInSet  NSCharacterSet whitespaceCharacterSet     in other file call TRIM        NSString  strEmail      strEmail   TRIM        this is the test       May it will help you

User · Answer

Easy task using stringByReplacingOccurrencesOfString  NSString  search    searchbar text stringByReplacingOccurrencesOfString      withString

User · Answer

pStrTemp    pStrTemp stringByTrimmingCharactersInSet  NSCharacterSet whitespaceAndNewlineCharacterSet

User · Answer

-  NSString   removeWhitespaces     return   self componentsSeparatedByCharactersInSet                       NSCharacterSet whitespaceCharacterSet         componentsJoinedByString

User · Answer

I strongly suggest placing this somewhere in your project   extension String       func trim   - gt  String           return self stringByTrimmingCharactersInSet NSCharacterSet whitespaceAndNewlineCharacterSet               func trim withSet  NSCharacterSet  - gt  String           return self stringByTrimmingCharactersInSet withSet

User · Answer

That is for removing any space that is when you getting text from any text field but if you want to remove space between string you can use   xyz   xyz text stringByReplacingOccurrencesOfString      withString         It will replace empty space with no space and empty field is taken care of by below method   searchbar text  searchbar text stringByTrimmingCharactersInSet   NSCharacterSet whitespaceCharacterSet

User · Answer

This for me is the best way   SWIFT          let myString      ciao    n              ciao               var finalString   myString as NSString          for character in myString          if character                      finalString   finalString stringByReplacingOccurrencesOfString      withString                else              finalString   finalString stringByReplacingOccurrencesOfString   n   withString                             println finalString    and the result is    ciaociao  But the trick is this    extension String        var NoWhiteSpace   String        var miaStringa   self as NSString      if miaStringa containsString              miaStringa    miaStringa stringByReplacingOccurrencesOfString      withString                    return miaStringa as String           let myString    Ciao   Ciao       Ciao  NoWhiteSpace    CiaoCiaoCiao

[objective-c] Remove all whitespaces from NSString

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