Setting font on NSAttributedString on UITextView disregards line spacing

Question

I m trying to set an attributed string to a UITextView in iOS 6  The problem is  if I attempt to set the font property on the attributed string  the line spacing is ignored  However  if I don t set the font  and the default font is used  then line spacing works   NSString  string      Hello  n world   attrString     NSMutableAttributedString alloc  initWithString string   NSMutableParagraphStyle  paragraphStyle     NSMutableParagraphStyle defaultParagraphStyle  mutableCopy    paragraphStyle minimumLineHeight   50     setting the font below makes line spacing become ignored  attrString addAttribute NSFontAttributeName value  UIFont boldSystemFontOfSize 20  range NSMakeRange 0  string length     attrString addAttribute NSParagraphStyleAttributeName value paragraphStyle range NSMakeRange 0  string length     mainTextView attributedText   attrString    Any idea what s going on

User · Answer

For proper line spacing  NSString  text1     Hello   NSString  text2      nWorld   UIFont  text1Font    UIFont fontWithName   HelveticaNeue-Medium  size 10   NSMutableAttributedString  attributedString1     NSMutableAttributedString alloc  initWithString text1 attributes    NSFontAttributeName   text1Font     NSMutableParagraphStyle  paragraphStyle1     NSMutableParagraphStyle alloc  init    paragraphStyle1 setAlignment NSTextAlignmentCenter    paragraphStyle1 setLineSpacing 4    attributedString1 addAttribute NSParagraphStyleAttributeName value paragraphStyle1 range NSMakeRange 0   attributedString1 length      UIFont  text2Font    UIFont fontWithName   HelveticaNeue-Medium  size 16   NSMutableAttributedString  attributedString2     NSMutableAttributedString alloc  initWithString text2 attributes   NSFontAttributeName   text2Font     NSMutableParagraphStyle  paragraphStyle2     NSMutableParagraphStyle alloc  init    paragraphStyle2 setLineSpacing 4    paragraphStyle2 setAlignment NSTextAlignmentCenter    attributedString2 addAttribute NSParagraphStyleAttributeName value paragraphStyle2 range NSMakeRange 0   attributedString2 length       attributedString1 appendAttributedString attributedString2

User · Answer

You can use this example and change it s implementation like this    self enumerateAttribute NSParagraphStyleAttributeName                  inRange NSMakeRange 0  self length                   options 0               usingBlock   id   Nullable value  NSRange range  BOOL    Nonnull stop                      NSMutableParagraphStyle  paragraphStyle     NSParagraphStyle defaultParagraphStyle  mutableCopy                        add your specific settings for paragraph                                                                     self removeAttribute NSParagraphStyleAttributeName range range                      self addAttribute NSParagraphStyleAttributeName value paragraphStyle range range

User · Answer

I found your question because I was also fighting with NSAttributedString  For me  the beginEditing and endEditing methods did the trick  like stated in Changing an Attributed String   Apart from that  the lineSpacing is set with setLineSpacing on the paragraphStyle   So you might want to try changing your code to   NSString  string      Hello  n world   attrString     NSMutableAttributedString alloc  initWithString string   NSMutableParagraphStyle  paragraphStyle     NSMutableParagraphStyle defaultParagraphStyle  mutableCopy     paragraphStyle setLineSpacing 20      Or whatever  positive  value you like         attrSting beginEditing     attrString addAttribute NSFontAttributeName value  UIFont boldSystemFontOfSize 20  range NSMakeRange 0  string length     attrString addAttribute NSParagraphStyleAttributeName value paragraphStyle range NSMakeRange 0  string length      attrString endEditing    mainTextView attributedText   attrString    Didn t test this exact code though  btw  but mine looks nearly the same   EDIT   Meanwhile  I ve tested it  and  correct me if I m wrong  the - beginEditing and - endEditing calls seem to be of quite an importance

User · Answer

Attributed String Programming Guide   UIFont  font    UIFont fontWithName   Palatino-Roman  size 14 0   NSDictionary  attrsDictionary    NSDictionary dictionaryWithObject font                                 forKey NSFontAttributeName   NSAttributedString  attrString     NSAttributedString alloc  initWithString   strigil  attributes attrsDictionary     Update  I tried to use addAttribute  method in my own app  but it seemed to be not working on the iOS 6 Simulator   NSLog        textView attributedText    The log seems to show correctly added attributes  but the view on iOS simulator was not display with attributes

User · Answer

There was a bug in iOS 6  that causes line height to be ignored when font is set  See answer to NSParagraphStyle line spacing ignored and longer bug analysis at Radar  UITextView Ignores Minimum Maximum Line Height in Attributed String

[objective-c] Setting font on NSAttributedString on UITextView disregards line spacing

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