ios - Swift Thread 1: EXC_BAD_INSTRUCTION when I try to change a uilabel.text -

i know there lot of stack overflow questions out there, none of answers can find work me. using custom uitableviewcell class called chillercell. here code:

import uikit  class chillercell: uitableviewcell {      @iboutlet weak var iconlabel: uilabel!     @iboutlet weak var boldlabel: uilabel!     @iboutlet weak var italiclabel: uilabel!      func configurecellwithevent(event: event){         boldlabel.text = "\(event.eventname)"         italiclabel.text = "\(event.eventdescription)"     } } 

i thread 1 runtime error on line boldlabel.text = "\(event.eventname)"

i made own event class, , yes, event.eventname , event.eventdescription of type string , not nil.

edit: forgot mention, boldlabel , italiclabel not plain text, attributed text.

try this, work if event object having eventname & eventdescription string:

func configurecellwithevent(event: event){     var attributedstring = nsmutableattributedstring(string:"(event.eventname)") , boldlabel.text = attributedstring     boldlabel.text = attributedstring     italiclabel.text = attributedstring }