ios - EKEvent 将相同的事件添加到日历

Question

我一直在测试此代码以将日历添加到 IOS Cal 应用程序，并将一些事件添加到应用程序中的特定日历。

我有一个装有 IOS7 的 Ipad，禁用了 iCloud。

第一个问题是当我创建日历时，我在 iPad 的 iCal 应用程序中看不到新创建的日历，即使没有添加到 iCloud，该应用程序是否应该显示所有日历？

第二个问题是我的代码每次调用该代码时都会添加相同的事件。

假设我调用了 add 函数，它第一次成功地添加了 3 个事件，下次当用相同的事件调用该函数时，它应该跳过添加，但它再次将这 3 个事件添加到日历，现在我有重复的事件，所以在...

-(void) initCalendar:(NSDictionary *)dataDict
{
    self.eventStore = [[EKEventStore alloc] init];
    if([self.eventStore respondsToSelector:@selector(requestAccessToEntityType:completion:)]) {
        // iOS 6 and later
        [self.eventStore requestAccessToEntityType:EKEntityTypeEvent completion:^(BOOL granted, NSError *error) {
            if (granted){
                //---- codes here when user allow your app to access theirs' calendar.
                NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
                self.isCalendarAccepted=YES;
                NSLog(@"self.isCalendarAccepted=YES;");
                if ([defaults objectForKey:@"Calendar"] == nil) // Create Calendar if Needed
                {
                    EKSource *theSource = nil;

                    for (EKSource *source in self.eventStore.sources) {
                        if (source.sourceType == EKSourceTypeCalDAV && [source.title isEqualToString:@"iCloud"]) {
                            theSource = source;
                            NSLog(@"iCloud Store Source");
                            break;
                        } else {
                            for (EKSource *source in self.eventStore.sources) {
                                if (source.sourceType == EKSourceTypeLocal) {
                                    theSource = source;
                                    NSLog(@"ios Local Store Source");
                                    break;
                                }
                            }
                        }
                    }


                    //EKCalendar *calendar = [EKCalendar calendarWithEventStore:self.eventStore];
                    EKCalendar *calendar =[EKCalendar calendarForEntityType:EKEntityTypeEvent eventStore:self.eventStore];
                    calendar.title = @"My App Name";
                    if (theSource) {
                        calendar.source = theSource;
                    } else {
                        NSLog(@"Error: Local source not available");
                        return;
                    }
                    NSError *errorCalendar = nil;
                    BOOL result = [self.eventStore saveCalendar:calendar commit:YES error:&errorCalendar];
                    if (result) {
                        NSLog(@"Saved calendar to event store.");
                        [[NSUserDefaults standardUserDefaults] setObject:calendar.calendarIdentifier forKey:@"Calendar"];
                        [[NSUserDefaults standardUserDefaults] synchronize];


                    } else {
                        NSLog(@"Error saving calendar: %@.", errorCalendar);
                    }

                }
                //start adding event to calendar
                [self addSelectedOwnEventsToCalendar:dataDict];
            }
        }];
    }


}

-(void)addSelectedOwnEventsToCalendar:(NSDictionary *)dataDict
{

            // Create a new event... save and commit
            NSError *error = nil;

            EKEvent *myEvent = [EKEvent eventWithEventStore:self.eventStore];


            myEvent.allDay = NO;
            myEvent.availability = EKEventAvailabilityFree;
            NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
            [dateFormatter  setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
            NSDate *startDate = [[NSDate alloc] init];
            NSString *startDateFormatted=[NSString stringWithFormat:@"%@ %@",[dataDict objectForKey:@"start_date"],[dataDict objectForKey:@"starts"]];
            startDate = [dateFormatter dateFromString:startDateFormatted];

            NSDateFormatter *dateFormatter1 = [[NSDateFormatter alloc] init];
            [dateFormatter1  setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
            NSDate *endDate = [[NSDate alloc] init];
            NSString *endDateFormatted=[NSString stringWithFormat:@"%@ %@",[dataDict objectForKey:@"end_date"],[dataDict objectForKey:@"ends"]];
            endDate = [dateFormatter1 dateFromString:endDateFormatted];

            //compare dates
            NSComparisonResult result = [startDate compare:endDate];
            if (result == NSOrderedAscending) {
            } else if (result == NSOrderedDescending) {
            }  else {
                //the same
                endDate=[startDate dateByAddingTimeInterval:60];
            }

            myEvent.startDate=startDate;
            myEvent.endDate = endDate;
            myEvent.title = [dataDict objectForKey:@"event_id"];
            myEvent.calendar = [self.eventStore calendarWithIdentifier:[[NSUserDefaults standardUserDefaults] objectForKey:@"Calendar"]];
            myEvent.location=[dataDict objectForKey:@"location"];



            NSArray *cals = [self.eventStore calendarsForEntityType: EKEntityTypeEvent];
            NSPredicate *predicateForEventsOnHolidayDate = [self.eventStore predicateForEventsWithStartDate:startDate endDate:endDate calendars:cals]; // nil will search through all calendars

            NSArray *eventsOnHolidayDate = [self.eventStore eventsMatchingPredicate:predicateForEventsOnHolidayDate];
            //NSLog(@"eventsOnHolidayDate %@",eventsOnHolidayDate);

            BOOL eventExists = NO;

            for (EKEvent *eventToCheck in eventsOnHolidayDate) {
                NSLog(@"eventToCheck.title %@",eventToCheck.title);
                NSLog(@"event_id %@",[dataDict objectForKey:@"event_id"]);
                if ([eventToCheck.title isEqualToString:[dataDict objectForKey:@"event_id"]]) {
                    eventExists = YES;
                    NSLog(@"Event Already Exists");
                }
            }
            //save eventts
            if (eventExists == NO) {
                [self.eventStore saveEvent:myEvent span:EKSpanThisEvent commit:YES error:&error];
                if (!error) {
                   // NSLog(@"the event saved and committed correctly with identifier %@", myEvent.eventIdentifier);

                } else {
                    NSLog(@"there was an error saving and committing the event");
                    NSLog(@"Error %@",error);
                    error = nil;

                }


            }
}

当我第一次运行代码时，NSlog 显示 (@"ios Local Store Source");

我错过了什么？

注意:代码大部分时间都在模拟器(Ipad ios 7)上运行，我假设 [NSUserDefaults] 有问题？

Answer 1

首先，请参阅 calendarItemExternalIdentifier 中关于重复项的讨论要点文档并确定它们是否适用。

然后，看看下面的建议:

1. calendar identifier可以换。确保 NSUserDefaults 中 key Calendar 的保存版本与 addSelectedOwnEventsToCalendar: 中访问的版本相同。
2. 从 NSUserDefaults 检索日历标识符时，确保它是有效的。
3. 尝试使用不带commit 参数的saveEvent:span:error: 方法。我在过去使用采用提交参数的保存事件方法时遇到过问题。

最后，我认为 iOS 日历访问授权只能在 iOS 设备上进行测试，这可能就是它在模拟器中运行的原因。