iOS - 从当前日期检索从过去1年到即将到来的1年的事件时出错

Question

这是我检索事件的代码

NSDate *now = [NSDate date];
NSDate *startDate = [self dateByAddingYears:-1 toDate:now];
NSDate *endDate = [self dateByAddingYears:1 toDate:now];
NSArray *events = [[ECEventStoreProxy sharedInstance] eventsFrom:[startDate beginningOfDay] to:[endDate endOfDay]];

self.sections = [NSMutableDictionary dictionary];
for (EKEvent *event in events)
{
    // Reduce event start date to date components (year, month, day)
    NSDate *dateRepresentingThisDay = [self dateAtBeginningOfDayForDate:event.startDate];

    // If we don't yet have an array to hold the events for this day, create one
    NSMutableArray *eventsOnThisDay = [self.sections objectForKey:dateRepresentingThisDay];
    if (eventsOnThisDay == nil) {
        if (event.calendar.allowsContentModifications) {
            eventsOnThisDay = [NSMutableArray array];

            // Use the reduced date as dictionary key to later retrieve the event list this day
            [self.sections setObject:eventsOnThisDay forKey:dateRepresentingThisDay];
        }

    }

    // Add the event to the list for this day
    [eventsOnThisDay addObject:event];
}

这是记录的错误

MyApp [5173：1001]从文件系统加载时区数据时出错。这是一个严重的问题。日历数据不保证准确。

如果开始日期更改为当前日期，则表现完美...但我想显示过去1年的活动列表......

编辑1：

- (NSDate *)dateByAddingYears:(NSInteger)numberOfYears toDate:(NSDate *)inputDate
{
// Use the user's current calendar
NSCalendar *calendar = [NSCalendar currentCalendar];

NSDateComponents *dateComps = [[NSDateComponents alloc] init];
[dateComps setYear:numberOfYears];

NSDate *newDate = [calendar dateByAddingComponents:dateComps toDate:inputDate options:0];
return newDate;
}