ios - How to make part of UITextView uneditable and clickable, with properly shown emojis? -


i have uitextview in app, , should contain uneditable , clickable suffix (categorystring), facebook 'feeling, watching, eating,...' status. shouldchangetextinrange , textviewdidchange methods this:

    func textviewdidchange(textview: uitextview) {              dispatch_async(dispatch_get_main_queue(), {                  textview.selectedrange = nsmakerange(self.globalint, 0)                 //on long press backspace, goes wrong                //nsmutableattributedstring, clear textview                //and set it's text categorystring again:                  if(!textview.text.hassuffix(self.categorystring)){                      self.globalint = 0                      self.posttextview.font = constants.fonts.posttextcategory                     textview.text = self.categorystring                     textview.selectedrange = nsmakerange(0,0)                  }             })               self.mymutablestring = nsmutableattributedstring(string: self.posttextview.text, attributes: [nsfontattributename:constants.fonts.posttextcategory!])             self.mymutablestring.addattribute(nsfontattributename, value: constants.fonts.posttext!, range: nsrange(location: 0, length: maxglobalint))             self.posttextview.attributedtext = self.mymutablestring          }      func textview(textview: uitextview, shouldchangetextinrange range: nsrange, replacementtext text: string) -> bool {              var temptext : nsstring = text             var currenttext : nsstring = textview.text              var texttoreturn = currenttext.length + (temptext.length - range.length)              if(text == "\n"){                 textview.resignfirstresponder()             }              var signaturelength = count(categorystring)              globalint = texttoreturn - signaturelength             maxglobalint = texttoreturn - signaturelength              if(range.location >  texttoreturn - signaturelength){                 return false             }else{                  return texttoreturn <= 160 + signaturelength             }          }

uitextview font bold default, use nsmutableattributedstring change font editable part of uitextview (you can see in textviewdidchange).

first problem: when edit uitextview, , want set cursor somewhere in middle of text, can type 1 character (even backspace) , cursor automatically move ending position of editable part of text. if add these lines of code shouldchangetextinrange

dispatch_async(dispatch_get_main_queue(), {         self.globalint = range.location + 1          if(count(text) == 0){             self.globalint = self.globalint - 1         }else{             self.globalint = range.location + 1         }     })

that solves problem, cursor position ok, have new 1 - emoji characters don't show properly:

before after

i assume that's happening because emoji character length, don't have idea how solve this?

second problem: how make uneditable part of uitextview clickable? (instead of setting cursor there)


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