无法在iOS 6中保存EKReminder

Question

我试图从我的应用程序中保存/检索提醒，但是由于某种原因，EKReminder似乎好像没有保存。 这是我的代码：

EKEventStore * _eventStore = [[EKEventStore alloc] init];
[_eventStore requestAccessToEntityType:EKEntityTypeReminder completion:^(BOOL granted, NSError *error) {

    //create a new calendar for reminders.
    EKCalendar *calendar = [EKCalendar calendarForEntityType:EKEntityTypeReminder eventStore:_eventStore];
    EKSource *localSource = nil;
    for (EKSource *source in _eventStore.sources)
        if (source.sourceType == EKSourceTypeLocal)
        {
            localSource = source;
            break;
        }

    calendar.source = localSource;

    self.calendarIdentifier = calendar.calendarIdentifier;
    EKReminder *reminder = [EKReminder reminderWithEventStore:_eventStore];
    reminder.calendar = calendar;
    reminder.title = @"Test Reminder";
    reminder.startDateComponents = [[NSCalendar currentCalendar] components:NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit fromDate:[NSDate date]];
    reminder.completionDate = [NSDate dateWithTimeIntervalSinceNow:100];

    EKAlarm *alarm = [EKAlarm alarmWithAbsoluteDate:[NSDate dateWithTimeIntervalSinceNow:100]];
    reminder.alarms = @[alarm];      

    NSError *errorOb = nil;
    BOOL saved = [_eventStore saveReminder:reminder commit:YES error:&errorOb];
    if (saved) NSLog(@"Saved Reminder");
    else NSLog(@"Failed to save reminder");

}];

然后，稍后，我尝试验证提醒是否已保存。 我通过使用以下代码来做到这一点：

NSPredicate *predicate = [_eventStore predicateForRemindersInCalendars:nil];
[_eventStore fetchRemindersMatchingPredicate:predicate completion:^(NSArray *reminders) {
    for (EKReminder *reminder in reminders) {
        NSLog(@"Reminder Title: %@", reminder.title);
    }
}];

而且我的新提醒永远不会显示！

谁能告诉我我在做什么错？

Answer 1

如果授权状态为EKAuthorizationStatusNotDetermined则仅需要调用-requestAccessToEntityType:completion: EKAuthorizationStatusNotDetermined 您可以使用+[EKEventStore authorizationStatusForEntityType:]检查授权状态。

然后，仅在您首次调用-requestAccessToEntityType:completion时才调用完成块。 在Simulator上甚至不会调用一次，因为在Simulator上您的应用程序已经可以访问。

EKEventStore * _eventStore = [[EKEventStore alloc] init];
EKAuthorizationStatus authorizationStatus = [EKEventStore authorizationStatusForEntityType:EKEntityTypeReminder];
if (authorizationStatus == EKAuthorizationStatusNotDetermined) {
    [_eventStore requestAccessToEntityType:EKEntityTypeReminder completion:^(BOOL granted, NSError *error) {
        if (granted) {
            [self createNewReminder];
        } else {
            [self showNowAccessAlert];
        }
    }];
} else {
    if (authorizationStatus == EKAuthorizationStatusAuthorized) {
        [self createNewReminder];
    } else {
        [self showNowAccessAlert];
    }
}

Answer 2

我通过将localSource切换为EKSourceTypeCalDAV来使其工作。 不能完全确定为什么要这样做，也许有人可以对此有所了解？

Answer 3

希望这对您有用。

    if([eventStore respondsToSelector:@selector(requestAccessToEntityType:completion:)])
    {
        // iOS 6 and later
        // asks user to allow application to use his device calendar
        [eventStore requestAccessToEntityType:EKEntityTypeReminder completion:^(BOOL granted, NSError *error)
        {
            if (granted)
            {
                EKReminder *reminder = [EKReminder reminderWithEventStore:eventStore];
                reminder.title = aNotification;
                reminder.calendar = [eventStore defaultCalendarForNewReminders];
                NSDate *date = //aDate;
                EKAlarm *alarm = [EKAlarm alarmWithAbsoluteDate:date];
                [reminder addAlarm:alarm];
                NSError *error = nil;
                [eventStore saveReminder:reminder commit:YES error:&error];

                if(error)
                    NSLog(@"unable to Reminder!: Error= %@", error);
            }
        }];
    }
    // iOS < 6
    else
    {
        EKReminder *reminder = [EKReminder reminderWithEventStore:eventStore];
        reminder.title = aNotification;
        reminder.calendar = [eventStore defaultCalendarForNewReminders];
        NSDate *date = //aDate;
        EKAlarm *alarm = [EKAlarm alarmWithAbsoluteDate:date];
        [reminder addAlarm:alarm];
        NSError *error = nil;
        [eventStore saveReminder:reminder commit:YES error:&error];

        if(error)
            NSLog(@"unable to Reminder!: Error= %@", error);
    }

如果您无法将事件保存到设备日历中，请查看我的这篇文章 。