xcode - CoreAnimation uncommitted CATranaction NSComboBox -


i populating nscombobox data function below. after populated , try scroll through items catransaction warning. can shed light on why happening , can fix it? have figured out may have changing ui of combobox on thread other main thread after stuck.

func getallrecords() {     catransaction.begin()     let url = nsurl(string: "http://url.php")     let task = nsurlsession.sharedsession().datataskwithurl(url!)         {             (data, response, error) in             var d = nsstring(data: data, encoding: nsutf8stringencoding)             var arr = d!.componentsseparatedbystring("<") // spliting incoming string "<" operator because before operator our required data , storing in array             var dataweneed:nsstring = arr[0] as! nsstring // arr[0] data before "<" operator , arr[1] no use             if let data = nsjsonserialization.jsonobjectwithdata(dataweneed.datausingencoding(nsutf8stringencoding)!, options: nsjsonreadingoptions.mutablecontainers, error: nil) as? nsarray                 {                     dd in data                         {                             var name : string = dd["name"]! as! string                             var email : string = dd["email"]! as! string                             //println("name: \(name)")                             //println("email: \(email)")                             self.usercombobox.additemswithobjectvalues([name])                         }                 }         }     task.resume()     catransaction.commit() }

here warning getting debug area.

2015-06-14 13:54:04.756 green time clock[2150:738395] unexpected        outstanding background catransaction coreanimation: warning, encountered thread uncommitted     catransaction; created by: 0   quartzcore                          0x00007fff9ab4d6c2     _zn2ca11transaction4pushev + 312 1   quartzcore                          0x00007fff9ab689a8   _zn2ca11transaction15ensure_implicitev + 276 2   quartzcore                          0x00007fff9ab4d842 _zn2ca11transaction9set_valueej12_cavaluetypepkv + 40 3   quartzcore                          0x00007fff9ab4f452 +[catransaction setdisableactions:] + 38 4   appkit                              0x00007fff921a1b8c -[nsview(nsinternal) _updatelayergeometryfromview] + 389 5   appkit                              0x00007fff921c7d09 -[nsview setframesize:] + 1129 6   appkit                              0x00007fff921c789a -[nscontrol setframesize:] + 77 7   appkit                              0x00007fff922e3891 -[nstableview setframesize:] + 256 8   appkit                              0x00007fff922e35f9 -[nstableview _tileandredisplayall] + 180 9   green time clock                    0x00000001000042d6 _tffc16green_time_clock14viewcontroller13getallrecordsfs0_ft_t_u_ftgsqcso6nsdata_gsqcso13nsurlresponse_gsqcso7nserror__t_ + 2886 10  green time clock                    0x0000000100004463 _ttrxfo_ogsqcso6nsdata_ogsqcso13nsurlresponse_ogsqcso7nserror__dt__xfo_itgsqs__gsqs0__gsqs1____it__ + 51 11  green time clock                    0x0000000100001e31 _tpa__ttrxfo_ogsqcso6nsdata_ogsqcso13nsurlresponse_ogsqcso7nserror__dt__xfo_itgsqs__gsqs0__gsqs1____it__ + 81 12  green time clock                    0x0000000100004493 _ttrxfo_itgsqcso6nsdata_gsqcso13nsurlresponse_gsqcso7nserror___it__xfo_ogsqs__ogsqs0__ogsqs1___dt__ + 35 13  green time clock                    0x00000001000044fa _ttrxfo_ogsqcso6nsdata_ogsqcso13nsurlresponse_ogsqcso7nserror__dt__xfdcb_dgsqs__dgsqs0__dgsqs1___dt__ + 90 14  cfnetwork                           0x00007fff8c09cba2 __49-[__nscflocalsessiontask _task_onqueue_didfinish]_block_invoke + 157 15  foundation                          0x00007fff9a75f7e8 __nsblockoperation_is_calling_out_to_a_block__ + 7

not sure root issue is, found warning when updating string value nstextview object , resolved following code now.

just make sure updating process handled in main thread.

// link: nstextstorage limitation on size , frequency of updates

dispatch_block_t block = ^ {     nsattributedstring *attributestring = [[nsattributedstring alloc] initwithstring:[nsstring stringwithformat:@"%@\n", strlog]];      nstextstorage* store = [_textviewoutputlog textstorage];     [store beginediting];     [store appendattributedstring:attributestring];     [store endediting];     [_textviewoutputlog scrollrangetovisible:nsmakerange([[_textviewoutputlog string] length], 0)]; };  if ([nsthread ismainthread]) {     block(); } else {     dispatch_async(dispatch_get_main_queue(), block); }

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