EKEvent with eventWithIdentifier on iOS [英] EKEvent with eventWithIdentifier on iOS

问题描述

如果我要从检索 EKEventStore 与检索 EKEvent eventWithIdentifier



这是添加事件的代码：

  EKEventStore * eventStore = [[EKEventStore alloc] init]; 
 EKEvent * newEvent = [EKEvent eventWithEventStore：eventStore]; 
 newEvent.title = @Test; 
 newEvent.availability = EKEventAvailabilityFree; 
 newEvent.startDate = startDate; 
 newEvent.endDate = endDate; 
 [newEvent addAlarm：[EKAlarm alarmWithRelativeOffset：-15 * 60]]; 
 
 newEvent.calendar = [eventStore defaultCalendarForNewEvents]; 
 
 NSError * err; 
 BOOL success = [eventStore saveEvent：newEvent span：EKSpanThisEvent commit：YES error：& err]; 
 
 if（success）{
 if（[newEvent respondingToSelector：@selector（calendarItemIdentifier）]）{
 [[NSUserDefaults standardUserDefaults] setObject：newEvent.calendarItemIdentifier forKey：self.showId ]; 
 NSLog（@事件ID：％@，newEvent.calendarItemIdentifier）; 
} 
 else {
 [[NSUserDefaults standardUserDefaults] setObject：newEvent.UUID forKey：self.showId]; 
 NSLog（@事件ID：％@，newEvent.UUID）; 
} 
} 
  

删除事件的代码：

  EKEventStore * eventStore = [[EKEventStore alloc] init]; 
 
 NSError * err; 
 BOOL success = YES; 
 
 NSLog（@事件ID：％@，[[NSUserDefaults standardUserDefaults] objectForKey：self.showId]）; 
 
 EKEvent * existingEvent = [eventStore eventWithIdentifier：[[NSUserDefaults standardUserDefaults] objectForKey：self.showId]]; 
 NSLog（@现有事件：％@，existingEvent）; 
 if（existingEvent！= nil）{
 success = [eventStore removeEvent：existingEvent span：EKSpanThisEvent error：& err]; 
} 
 if（success）{
 [[NSUserDefaults standardUserDefaults] removeObjectForKey：self.showId]; 
} 
  

为什么我无法使用相同的事件ID从日历中删除以前添加的活动？ / p>



此代码已在iOS 5（iPad 1）和iOS 6（新iPad）上测试...

解决方案

我使用 newEvent.eventIdentifier 而不是 newEvent.calendarItemIdentifier 到目前为止，使用 [store eventWithIdentifier：_project.event_identifier] ，我可以检索，删除和编辑现有的事件。你应该尝试。

If I want to retrieve EKEvent from EKEventStore with eventWithIdentifier method for previously saved event but I always get null.

This is the code for adding event:

EKEventStore *eventStore = [[EKEventStore alloc] init];
EKEvent *newEvent = [EKEvent eventWithEventStore:eventStore];
newEvent.title = @"Test";
newEvent.availability = EKEventAvailabilityFree;
newEvent.startDate = startDate;
newEvent.endDate = endDate;
[newEvent addAlarm:[EKAlarm alarmWithRelativeOffset:-15*60]];

newEvent.calendar = [eventStore defaultCalendarForNewEvents];

NSError *err;
BOOL success = [eventStore saveEvent:newEvent span:EKSpanThisEvent commit:YES error:&err];

if (success) {
    if ([newEvent respondsToSelector:@selector(calendarItemIdentifier)]) {
        [[NSUserDefaults standardUserDefaults] setObject:newEvent.calendarItemIdentifier forKey:self.showId];
        NSLog(@"Event ID: %@",newEvent.calendarItemIdentifier);
    }
    else {
        [[NSUserDefaults standardUserDefaults] setObject:newEvent.UUID forKey:self.showId];
        NSLog(@"Event ID: %@",newEvent.UUID);
    }
}

And code for removing event:

EKEventStore *eventStore = [[EKEventStore alloc] init];

NSError *err;
BOOL success = YES;

NSLog(@"Event ID: %@",[[NSUserDefaults standardUserDefaults] objectForKey:self.showId]);

EKEvent *existingEvent = [eventStore eventWithIdentifier:[[NSUserDefaults standardUserDefaults] objectForKey:self.showId]];
NSLog(@"Existing event: %@",existingEvent);
if (existingEvent != nil) {
    success = [eventStore removeEvent:existingEvent span:EKSpanThisEvent error:&err];
}
if (success) {
    [[NSUserDefaults standardUserDefaults] removeObjectForKey:self.showId];
}

Why I cannot remove previously added event from calendar with the same event id ?

This code was tested on iOS 5 (iPad 1) and iOS 6 (new iPad)...

解决方案

I am using newEvent.eventIdentifier instead of newEvent.calendarItemIdentifier and so far, using [store eventWithIdentifier:_project.event_identifier], I can retrieve, delete and edit an existing event. you should try.

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