ios - EKEventStore causes SpringBoard crash -

i build application fetches ekevents calendar (by ekeventstore predicateforeventswithstartdate:enddate:calendars:) , synchronize app-events calendars (with ekeventstore saveevent:span:commit:error:).

i use static reference ekeventstore , make sure ekeventstore not accessed simultaneously different processes.

the app terminated springboard crash on ios7. here backtrace of crash.

last exception backtrace: 0   corefoundation                  0x18625e950 __exceptionpreprocess + 132 1   libobjc.a.dylib                 0x1927641fc objc_exception_throw + 60 2   corefoundation                  0x18625e810 +[nsexception raise:format:arguments:] +     116 3   foundation                      0x186d96db4 -[nsassertionhandler     handlefailureinmethod:object:file:linenumber:description:] + 112 4   eventkit                        0x186adab84 -[ekeventstore _addfetchedobjectwithid:] + 240 5   eventkit                        0x186adaa64 __78-[ekeventstore registerfetchedobjectwithid:withdefaultloadedproperties:inset:]_block_invoke + 96 6   libdispatch.dylib               0x192d3bfd4 _dispatch_client_callout + 16 7   libdispatch.dylib               0x192d41c84 _dispatch_barrier_sync_f_invoke + 48 8   eventkit                        0x186ada990 -[ekeventstore     registerfetchedobjectwithid:withdefaultloadedproperties:inset:] + 148 9   eventkit                        0x186ae1458 __41-[ekpredicatesearch startwithcompletion:]_block_invoke + 796 10  eventkit                        0x186ae1050 -[ekdaemonconnection _processreplywithid:data:finished:] + 220 11  eventkit                        0x186ae0f5c cadreceivereply + 136 12  eventkit                        0x186ae0eac _xreply + 124 13  eventkit                        0x186ae0e04 clientcallbacks_server + 100 14  libdispatch.dylib               0x192d3fae8 dispatch_mig_server + 352 15  eventkit                        0x186ae0d6c __43-[ekdaemonconnection initwithoptions:path:]_block_invoke16 + 44 16  libdispatch.dylib               0x192d3bfd4 _dispatch_client_callout + 16 17  libdispatch.dylib               0x192d3db90 _dispatch_source_invoke + 500 18  libdispatch.dylib               0x192d430f4 _dispatch_root_queue_drain + 104 19  libdispatch.dylib               0x192d434fc _dispatch_worker_thread2 + 76 20  libsystem_pthread.dylib         0x192ed16bc _pthread_wqthread + 356 21  libsystem_pthread.dylib         0x192ed154c start_wqthread + 4 

here code initalizing ekeventstore:

+ (ekeventstore *) sharedstore {      static ekeventstore *sharedeventstore;      if (sharedeventstore == nil) {         sharedeventstore = [[ekeventstore alloc] init];         [sharedeventstore requestaccesstoentitytype: ekentitytypeevent completion:^(bool granted, nserror *error) {         }];         [sharedeventstore reset];     }      return sharedeventstore; } 

code fetch events:

nspredicate *predicate = [[calendarhelper sharedstore] predicateforeventswithstartdate:startdate                                                         enddate:enddate                                                       calendars:[[showablecalendars copy] autorelease]]; nsarray *result = [[calendarhelper sharedstore] eventsmatchingpredicate:predicate]; 

and update / create events:

ekevent *event = [[calendarhelper sharedstore] eventwithidentifier:eventid]; if(event != nil) {     event.title = title;     event.startdate = startdate;     event.enddate = enddate;     nslog(@"updating...");     nslog(@"+++ %@", event.eventidentifier);      [[calendarhelper sharedstore] saveevent:event span:ekspanthisevent commit:commit error:nil];     nslog(@"updated."); } else {     nslog(@"no event, no update"); } 

any clue?

kindly check ios version.. experienced similar crash when working ios 7.0.2, if not try below code

it seems cause of bug related how many events trying in our app. check on apple's bug report (15424747).

it appears bug introduced when our app predicate on eventstore large range of dates.

here code:

nspredicate *predicate = [self.eventstore predicateforeventswithstartdate:startdate     enddate:enddate calendars:nil];  

//for sorting used nssortdescriptor

if (!self.masterlistsortdescriptor) {         self.masterlistsortdescriptor = [nssortdescriptor sortdescriptorwithkey:@"startdate"  ascending:yes];  }  nsarray *result = [[self.eventstore eventsmatchingpredicate:predicate] sortedarrayusingdescriptors:@[self.masterlistsortdescriptor]];