我正在尝试检查某个 nsdate 是否在我的事件存储中。当前月份的事件存储在 NSMutableArray
中。我正在使用这些函数来创建事件存储并获取其中的对象:
- (void) viewDidLoad{
[super viewDidLoad];
self.almacenEventos = [EKEventStore new];
self.listaEventos = [NSMutableArray new];
self.calendario = [self.almacenEventos defaultCalendarForNewEvents];
[self.listaEventos addObjectsFromArray:[self monthEvents]];
}
-(NSArray *) monthEvents{
NSDate *firstMonthDay = [NSDate firstDayOfCurrentMonth];
NSDate *lastMonthDay = [NSDate firstDayOfNextMonth];
NSArray *calendarios = [[NSArray alloc]initWithObjects:self.calendario, nil];
NSPredicate * predicado = [self.almacenEventos predicateForEventsWithStartDate:firstMonthDay endDate:lastMonthDay calendars:calendarios];
return [self.almacenEventos eventsMatchingPredicate:predicado];
}
firstDayOfCurrentMonth
和 firstDayOfNextMonth
将正确返回当前月份的日期。初始化后,self.listaEventos
拥有所有当前月份的事件。
检查 self.almacenEventos
是否包含 NSDate
时会出现问题。我正在使用 tapku 日历来显示月份网格。并遵循开发人员和其他第 3 方帮助的所有说明。
我调试了代码,试图找出问题所在。 “d”是要比较的日期,返回长格式 2012-08-29 00:00:00 +0000。
单个事件的日期格式为:
startDate = 2012-08-04 22:00:00 +0000;
endDate = 2012-08-05 21:59:59 +0000;
所以我被困在这个函数的中间,数组中存在给定日期的对象。如果我使用手动日期数组而不是事件数组,它就像一个魅力......那么我在这里做错了什么?它是返回的 NSDateComponents
吗?我该怎么做?非常感谢
- (NSArray*) checkDate:(TKCalendarMonthView*)monthView marksFromDate:(NSDate*)startDate toDate:(NSDate*)lastDate{
NSMutableArray *marks = [NSMutableArray array];
NSCalendar *cal = [NSCalendar currentCalendar];
[cal setTimeZone:[NSTimeZone timeZoneForSecondsFromGMT:0]];
NSDateComponents *comp = [cal components:(NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit) fromDate:startDate];
NSDate *d = [NSDate new];
d = [cal dateFromComponents:comp];
// Init offset components to increment days in the loop by one each time
NSDateComponents *offsetComponents = [[NSDateComponents alloc] init];
[offsetComponents setDay:1];
// for each date between start date and end date check if they exist in the data array
while (YES) {
// Is the date beyond the last date? If so, exit the loop.
// NSOrderedDescending = the left value is greater than the right
if ([d compare:lastDate] == NSOrderedDescending) {
break;
}
// If the date is in the data array, add it to the marks array, else don't
if ([self.listaEventos containsObject:d]) {
[marks addObject:[NSNumber numberWithBool:YES]];
} else {
[marks addObject:[NSNumber numberWithBool:NO]];
}
// Increment day using offset components (ie, 1 day in this instance)
d = [cal dateByAddingComponents:offsetComponents toDate:d options:0];
}
return [NSArray arrayWithArray:marks];
}
最佳答案
checkDate:marksFromDate:toDate
方法期望 self.listaEventos
是一个 NSMutableDictionary
,由包含 EKEvent 数组的日期索引
:
// There are events on these 4 dates
self.listaEventos = {
"2012-08-15 00:00:00 +0000" = (...),
"2012-08-17 00:00:00 +0000" = (...),
"2012-08-18 00:00:00 +0000" = (...),
"2012-08-29 00:00:00 +0000" = (...)
}
我会将 monthEvents
更改为如下内容:
-(NSMutableDictionary *) monthEvents{
NSMutableDictionary *retVal;
NSDate *firstMonthDay = [NSDate firstDayOfCurrentMonth];
NSDate *lastMonthDay = [NSDate firstDayOfNextMonth];
NSArray *calendarios = [[NSArray alloc]initWithObjects:self.calendario, nil];
NSPredicate * predicado = [self.almacenEventos predicateForEventsWithStartDate:firstMonthDay endDate:lastMonthDay calendars:calendarios];
NSArray *results = [self.almacenEventos eventsMatchingPredicate:predicado];
// Next add all events to our dictionary indexed by date
for (EKEvent *evt in events) {
NSDate *dateKey = [self dateWithoutTime:evt];
// A date may have multiple events. Get all current events for the date
NSArray *eventsForDate = [retVal objectForKey:dateKey];
// If no events were set for the date
if (![eventsForDate isKindOfClass:[NSArray class]]) {
// create an array using a factory method
eventsForDate = [NSArray arrayWithObject:evt];
} else {
// append the object to our array of events
eventsForDate = [eventsForDate arrayByAddingObject:evt];
}
// Update the dictionary
[retVal setObject:eventsForDate forKey:dateKey];
}
return retVal;
}
- (NSDate *)dateWithoutTime:(NSDate *)date
{
TKDateInformation info = [date dateInformationWithTimeZone:[NSTimeZone systemTimeZone]];
// lop off hour/minute/seconds so all dates for the day are equal
info.hour = 0;
info.minute = 0;
info.second = 0;
return [NSDate dateFromDateInformation:info timeZone:[NSTimeZone timeZoneForSecondsFromGMT:0]];
}
关于ios - 检查 NSDate 是否在 EKEventStore 中,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/11815442/