xcode - thread 1 exc_bad_instruction.. Error with swift -


i'm in need of serious help. i'm trying create database in xcode project of firebase, keep getting same exact error after build succeeds , closes giving me error :

thread 1 exc_bad_instruction (code=exc_i386_invop subcode=0x0)

any idea about?

here's line of code error on.

let label2 = cell.viewwithtag(2)as! uilabel

here's of code

    // //  database.swift //  intern // //  created lani  daniels on 8/20/17. //  copyright © 2017 lani  daniels. rights reserved. //  import uikit import firebase import firebasedatabase  struct poststruct {         let title: string         let message: string     }    class databaseviewcontroller: uitableviewcontroller {      var posts: [poststruct] = []      override func viewdidload() {         super.viewdidload()         //         let databaseref = database.database().reference()          databaseref.child("posts").queryorderedbykey().observe(.childadded, with: {             snapshot in              let snapshotvalue = snapshot.value as? nsdictionary             let title = snapshotvalue?["title"] as? string              let message = snapshotvalue?["message"] as? string              self.posts.insert(poststruct(title: title ?? "", message: message ?? ""), at: 0)             self.tableview.reloaddata()         })         post()     }     func post(){          let title = "title"         let message = "message"          let post : [string : anyobject] = ["title" : title anyobject, "message" : message anyobject]           let databaseref  = database.database().reference()          databaseref.child("posts").childbyautoid().setvalue(post)     }     override func tableview(_ tableview: uitableview, numberofrowsinsection section: int) -> int {         return posts.count     }      override func tableview(_ tableview: uitableview, cellforrowat indexpath: indexpath) -> uitableviewcell {          let cell = tableview.dequeuereusablecell(withidentifier: "cell", for: indexpath)          let label1 = cell.viewwithtag(1)as! uilabel         label1.text=posts[indexpath.row].title          let label2 = cell.viewwithtag(2)as! uilabel // error code: thread 1 exc_bad_instruction (code=exc_i386_invop subcode=0x0)         label2.text=posts[indexpath.row].message          return cell      } }

thread 1 exc_bad_instruction (code=exc_i386_invop subcode=0x0) error means app determined elements should exists, crash when doesn't

in case, there might 2 reasons why happening:

  1. please check whether view tagged "2" uilabel.
  2. please check whether view tagged "2" exist.

the reason of crashing should either 1 of them.


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