title: Remove white space from the left of NSString
body: <p>I need to remove the white space only from the left of NSString I mean</p>
  
  <p>if I have <code>"   This is a good day"</code> I will have <code>"This is a good day"</code></p>
  
  <p>only the left spaces only</p>
  
  <p>any suggestion please </p>