How to delete all the Events of My App Calendar when app is deleted from device in iOS

Question

I am having a calendar with name MyCalendar.

I have stored some events to that calendar..

I know how to delete all the events from the calendar..as below

NSDate *startDate = [NSDate date];
NSDate* endDate =  [NSDate dateWithTimeIntervalSinceNow:[[NSDate distantFuture] timeIntervalSinceReferenceDate]];
NSArray *calendarArray = [NSArray arrayWithObject:self.defaultCalendar];

NSPredicate *predicate = [self.eventStore predicateForEventsWithStartDate:startDate
                                                                              endDate:endDate
                                                                            calendars:calendarArray];

NSArray *events = [self.eventStore eventsMatchingPredicate:predicate];

for (EKEvent *event in events) {
   NSError* err = nil;
   [self.eventStore removeEvent:event span:EKSpanFutureEvents commit:YES error:&err];

}

But when user deleted my app from device. How can I delete all the events related to Calendar MyCalendar.

As unnecessary some events of the deleted app still exists at device calendar.

It is worst to keep events related to My App if user don't want to use My App..

Any Ideas & Suggestions are appreciated..Is it possible?

Thanks in Advance..

I doubt this is possible, but it is a very customer-friendly thought, so I would suggest opening a radar to request it (https://bugreport.apple.com). — Rob Napier, Feb 04 '15 at 13:15

score 6 · Accepted Answer · answered May 05 '15 at 06:41

It is pretty straightforward that we don't have any control to do some action when user is going to delete application from iPhone. May be you can provide Delete All Events option inside application to notify user with proper massage. i think user at least single time used your application before deleting. so i think if he/she has proper idea of how this app is working then defiantly they can delete app events from application and then deleting app.

Actually we don't have any option that why i would suggest you this one. what so amount of user taking advantage of this option will helpful for them.

Actually weather apple handle such functionality or not it up to them. because some time events is not just related to app like Adding birthday event from facebook is not just related to facebook. user need that reminder even though facebook app is deleted. so i think apple need to figure out certain solution from handling such situation.

Hope this help you.

@None...It clarified me about the possibilities for the solution. Nice explanation..Thanx ! Hope Apple will provide any alternatives to handle this functionality & cases....! — Vidhyanand, May 08 '15 at 04:37

score 1 · Answer 2 · answered May 01 '15 at 07:58

1

I also don't think this is possible. And I would also think that there may had been countless radars requesting it during the years.

I think the problem is the way you store the events. If they are just related to your app, then you should store them in app, and they are only accessible in the app, and deleted when the app is deleted.

If you store them to device Calendar, then I see your app just as a manager of calendar events. Not your app events, but the USER events. He can use your app to manage them, or another app. If they are in the user Calendar, they are probably saved on cloud too, and he can manage them from the mac too.

If they would allow the functionality that you want, what would stop you from being destructive and delete all the events in the user Calendar, as a revenge because it deletes your app?

answered May 01 '15 at 07:58

pteofil

4,133
17
27

I am adding events to Calendar with calendar name same as AppName..If User deleted the AppName say "ShopApp" then I only need to delete all the events are stored with "ShopApp" Calendar only not all the calendar events of Default Calendar...! – Vidhyanand May 01 '15 at 09:27
I understand that you only want to delete that ones that were added by your app. I was just telling you that if Apple would allow you to delete, that this can be used in a bad way too. – pteofil May 01 '15 at 10:29
But I would still maintain my position that it's not your job to delete events from the Calendar when the app is deleted. The most you can do is provide a button in the app so the users can delete all events if they want. – pteofil May 01 '15 at 10:30
Why could this used in a bad way? Simply restrict the deletable events to those, the app added. Or let the system delete the events on request, if the app is deleted. There are 234972398437 ways to accomplish that safely. – Amin Negm-Awad May 04 '15 at 09:04

score 1 · Answer 3 · edited May 23 '17 at 12:32

1

An iOS application doesn't receive any callbacks when it is about to be uninstalled, so it's not possible to do what you want.

See this question Detect iOS application about to delete?

edited May 23 '17 at 12:32

Community

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answered May 07 '15 at 19:49

Rob MacEachern

821
8
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How to delete all the Events of My App Calendar when app is deleted from device in iOS

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