EKEvent eventIdentifier null xcode 9.4

Question

我使用XCode保存事件并保存正常。保存也返回一个ID。

当我尝试获取日历的所有事件，然后逐个访问事件的ID时，它总是nil

保存代码：

-(NSNumber*) save:(id)arg 
{
    id val = nil;
    ENSURE_ARG_OR_NIL_AT_INDEX(val, arg, 0, NSNumber);
    EKSpan span = EKSpanThisEvent;
    if (val != nil) {
        span = [TiUtils intValue:val def:EKSpanThisEvent];
    }
    EKEventStore* ourStore = [module store];
    if (ourStore == NULL) {
        DebugLog(@"Could not save event, missing Event Store");
        return NUMBOOL(NO);
    }
    EKEvent* currEvent = [self event];
    if (currEvent == NULL) {
        DebugLog(@"event is missing");
        return NUMBOOL(NO);
    }
    __block NSError * error = nil;
    __block BOOL result;
    TiThreadPerformOnMainThread(^{
        result = [ourStore saveEvent:currEvent span:span commit:YES error:&error];
    }, YES);`enter code here`
    if (result == NO || error != nil) {
        [self throwException:[NSString stringWithFormat:@"Failed to save event : %@",[TiUtils messageFromError:error]]
           subreason:nil
          location:CODELOCATION];
    }
    return NUMBOOL(result);
}

Retreive Code：

- (NSArray *)_fetchAllEventsbetweenDate:(NSDate *)date1 andDate:(NSDate *)date2
{
  if (![NSThread isMainThread]) {
    __block id result = nil;
    TiThreadPerformOnMainThread(^{
      result = [[self _fetchAllEventsbetweenDate:date1 andDate:date2] retain];
    },
        YES);
    return [result autorelease];
  }
  EKEventStore *ourStore = [self ourStore];
  if (ourStore != nil) {
    NSPredicate *predicate = [ourStore predicateForEventsWithStartDate:date1
                                                               endDate:date2
                                                             calendars:[NSArray arrayWithObject:[self calendar]]];
    return [ourStore eventsMatchingPredicate:predicate];
  }
  return NULL;
}