ios - Perform the segue from table view to the web view error -


i run error when try perform segue table view web view (for youtube videos). attached code both views, error , target output console. seems problem wkwebview class... don't error related that.

sender:

func tableview(_ tableview: uitableview, didselectrowat indexpath: indexpath) {     let partyrock = partyrocks[indexpath.row]     performsegue(withidentifier: "videovc", sender: partyrock) }  override func prepare(for segue: uistoryboardsegue, sender: any?) {     if let destination = segue.destination as? videovc {         if let party = sender as? partyrock {             destination.partyrock = party         }     } }

destination:

import uikit  class videovc: uiviewcontroller {  @iboutlet weak var webview: uiwebview! @iboutlet weak var titlelbl: uilabel!  private var _partyrock: partyrock! var partyrock: partyrock {     {         return _partyrock     } set {         _partyrock = newvalue     } }  override func viewdidload() {     super.viewdidload()     titlelbl.text = partyrock.videotitle     webview.loadhtmlstring(partyrock.videourl, baseurl: nil) } }

the console output:

2017-08-18 13:33:10.460227+0300 tableviews-youtubevideo[49329:7366415] [boringssl] function boringssl_context_get_peer_sct_list: line 1739 received sct extension length less sct data length 2017-08-18 13:33:16.756971+0300 tableviews-youtubevideo[49329:7366015] *** terminating app due uncaught exception 'nsinvalidunarchiveoperationexception', reason: 'could not instantiate class named wkwebview' *** first throw call stack: (     0   corefoundation                      0x000000010fbc626b __exceptionpreprocess + 171     1   libobjc.a.dylib                     0x000000010c324f41 objc_exception_throw + 48     2   corefoundation                      0x000000010fc3aba5 +[nsexception raise:format:] + 197     3   uikit                               0x000000010cfae7cc uinibdecoderdecodeobjectforvalue + 323     4   uikit                               0x000000010cfaeae7 uinibdecoderdecodeobjectforvalue + 1118     5   uikit                               0x000000010cfae67e -[uinibdecoder decodeobjectforkey:] + 89     6   uikit                               0x000000010c99041f -[uiview initwithcoder:] + 969     7   uikit                               0x000000010cfae949 uinibdecoderdecodeobjectforvalue + 704     8   uikit                               0x000000010cfae67e -[uinibdecoder decodeobjectforkey:] + 89     9   uikit                               0x000000010cd631fb -[uiruntimeconnection initwithcoder:] + 178     10  uikit                               0x000000010cfae949 uinibdecoderdecodeobjectforvalue + 704     11  uikit                               0x000000010cfaeae7 uinibdecoderdecodeobjectforvalue + 1118     12  uikit                               0x000000010cfae67e -[uinibdecoder decodeobjectforkey:] + 89     13  uikit                               0x000000010cd623f8 -[uinib instantiatewithowner:options:] + 1262     14  uikit                               0x000000010ca8dd49 -[uiviewcontroller _loadviewfromnibnamed:bundle:] + 383     15  uikit                               0x000000010ca8e652 -[uiviewcontroller loadview] + 177     16  uikit                               0x000000010ca8e983 -[uiviewcontroller loadviewifrequired] + 195     17  uikit                               0x000000010ca8f1e0 -[uiviewcontroller view] + 27     18  uikit                               0x000000010d4e639d -[_uifullscreenpresentationcontroller _setpresentedviewcontroller:] + 89     19  uikit                               0x000000010ca5fa8f -[uipresentationcontroller initwithpresentedviewcontroller:presentingviewcontroller:] + 133     20  uikit                               0x000000010caa2338 -[uiviewcontroller _presentviewcontroller:withanimationcontroller:completion:] + 3808     21  uikit                               0x000000010caa514a __62-[uiviewcontroller presentviewcontroller:animated:completion:]_block_invoke + 134     22  uikit                               0x000000010caa55ea -[uiviewcontroller _performcoordinatedpresentordismiss:animated:] + 532     23  uikit                               0x000000010caa5086 -[uiviewcontroller presentviewcontroller:animated:completion:] + 181     24  uikit                               0x000000010caaa487 -[uiviewcontroller _showviewcontroller:withaction:sender:] + 274     25  uikit                               0x000000010d0349a4 __66-[uistoryboardshowseguetemplate newdefaultperformhandlerforsegue:]_block_invoke + 134     26  uikit                               0x000000010d1e8dcb -[uistoryboardseguetemplate _performwithdestinationviewcontroller:sender:] + 279     27  uikit                               0x000000010d1e8c83 -[uistoryboardseguetemplate _perform:] + 82     28  uikit                               0x000000010ca91bc4 -[uiviewcontroller performseguewithidentifier:sender:] + 99     29  tableviews-youtubevideo             0x000000010ba025c1 _t023tableviews_youtubevideo6mainvcc9tableviewyso07uitableh0c_10foundation9indexpathv14didselectrowattf + 273     30  tableviews-youtubevideo             0x000000010ba0266c _t023tableviews_youtubevideo6mainvcc9tableviewyso07uitableh0c_10foundation9indexpathv14didselectrowattfto + 92     31  uikit                               0x000000010ca2d603 -[uitableview _selectrowatindexpath:animated:scrollposition:notifydelegate:] + 1810     32  uikit                               0x000000010ca2d81e -[uitableview _userselectrowatpendingselectionindexpath:] + 344     33  uikit                               0x000000010c900739 _runaftercacommitdeferredblocks + 318     34  uikit                               0x000000010c8eef81 _cleanupaftercaflushandrundeferredblocks + 280     35  uikit                               0x000000010c91f0d8 _aftercacommithandler + 137     36  corefoundation                      0x000000010fb68e57 __cfrunloop_is_calling_out_to_an_observer_callback_function__ + 23     37  corefoundation                      0x000000010fb68dae __cfrunloopdoobservers + 430     38  corefoundation                      0x000000010fb4d3c4 __cfrunlooprun + 1572     39  corefoundation                      0x000000010fb4cb29 cfrunlooprunspecific + 409     40  graphicsservices                    0x00000001122589c6 gseventrunmodal + 62     41  uikit                               0x000000010c8f49a4 uiapplicationmain + 159     42  tableviews-youtubevideo             0x000000010ba06757 main + 55     43  libdyld.dylib                       0x0000000110ce8621 start + 1     44  ???                                 0x0000000000000001 0x0 + 1 ) libc++abi.dylib: terminating uncaught exception of type nsexception (lldb)


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