ios - 如何在 iOS 中更新或编辑 EKEvent 并使用标识符存储在 native 日历中？

Question

我在我的应用程序中使用 EKEvent 来获取所有商店事件，我想通过标识符编辑任何特定事件并重新保存到现有的..我应该怎么做？

EKEventStore *store = [EKEventStore new];
    EKEvent *event = [EKEvent eventWithEventStore:store];

    event.title = @"abc";
    event.notes= @"this is updated notes";

    event.calendar = [store defaultCalendarForNewEvents];
    NSError *err = nil;

    [store saveEvent:event span:EKSpanThisEvent commit:YES error:&err];

这段代码是我用来存储事件的，但是在哪里传递标识符以仅更新特定事件？

Answer 1

您应该将事件标识符保存在数据库中，以便您以后可以使用它来更新或删除事件。使用创建事件后:

[store saveEvent:event span:EKSpanThisEvent commit:YES error:&err];

您可以访问 event.eventIdentifier。将其保存在数据库中。当您想编辑特定事件时，只需使用存储的 ID 获取该事件:

-(void)updateNotification:(NSMutableDictionary *) info
{
    EKEventStore *eventStore = [[EKEventStore alloc] init];
    [eventStore requestAccessToEntityType:EKEntityTypeEvent completion:^(BOOL granted, NSError *error)
     {
         if (!granted)
         {
             dispatch_async(dispatch_get_main_queue(), ^{

                 UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Cannot access Calendar" message:@"Please give the permission to add task in calendar from iOS > Settings > Privacy > Calendars" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles: nil];
                 [alert show];

             });
             return;
         }

         if (error)
         {
             NSLog(@"%@", error);
         }

         //this is event ID you saved in DB. now you want to edit that event
         EKEvent *event  = [eventStore eventWithIdentifier:info[@"eventID"]]; 

         if(event) {

//You have your valid event. Modify as per your need.

             event.title     = [info valueForKey:@"title"];
             event.notes        = [info valueForKey:@"description"];
             event.startDate = [info objectForKey:@"date"];
             event.endDate   = [[NSDate alloc] initWithTimeInterval:3600*24 sinceDate:event.startDate];
             event.calendar = eventStore.defaultCalendarForNewEvents;

             [eventStore saveEvent:event span:EKSpanThisEvent commit:YES error:&error];

         }

     }];
}

希望对您有所帮助。如有任何疑问，请随时提出。