I have a Cordova app with a custom plugin that is creating and updating EKEvents in the user's iCloud calendar.
I am using the following function to find a specific EKEvent based on its URL:
- (EKEvent*) getEventWithURL:(NSString *)pstrURL store:(EKEventStore *)pStore
{
EKCalendar* calendar = [self getCalendarByName:mstrCalendarName store:pStore createIfDoesNotExist:false];
NSArray* calendars = [[NSArray alloc] initWithObjects: calendar, nil];
NSDateFormatter *sDate = [[NSDateFormatter alloc] init];
[sDate setDateFormat:#"yyyy-MM-dd HH:mm"];
NSDate *myStartDate = [sDate dateFromString:#"2013-11-01 00:00"];
NSDateFormatter *eDate = [[NSDateFormatter alloc] init];
[eDate setDateFormat:#"yyyy-MM-dd HH:mm"];
NSDate *myEndDate = [eDate dateFromString:#"2014-12-31 23:59"];
NSPredicate *predicate = [pStore predicateForEventsWithStartDate:myStartDate endDate:myEndDate calendars: calendars];
// Fetch all events that match the predicate.
NSArray *events = [pStore eventsMatchingPredicate:predicate];
EKEvent *foundEvent = nil;
EKEvent *event;
for (id oEvent in events)
{
event = (EKEvent *)oEvent;
if ([event.URL isEqual:[NSURL URLWithString:pstrURL]])
{
foundEvent = event;
break;
}
}
return foundEvent;
}
It is then modified (start and end dates are changed) and saved in another method with the following code:
EKEvent *myEvent = nil;
BOOL saved = false;
EKCalendar* calendar = nil;
if(pstrCalendarTitle == nil)
{
calendar = pStore.defaultCalendarForNewEvents;
}
else
{
calendar = [self getCalendarByName: pstrCalendarTitle store: pStore createIfDoesNotExist:true];
}
// find event if it exists
myEvent = [self getEventWithURL:[NSString stringWithFormat: #"custom://%#", pstrTSDID ] store:pStore];
// if an event wasn't found, create a new one
if (myEvent == nil)
{
myEvent = [EKEvent eventWithEventStore: pStore];
}
// set all the fields to new values
myEvent.title = pstrTitle;
myEvent.location = pstrLocation;
myEvent.notes = pstrMessage;
myEvent.startDate = pdtStartDate;
myEvent.endDate = pdtEndDate;
myEvent.calendar = calendar;
myEvent.URL = [NSURL URLWithString:[NSString stringWithFormat: #"custom://%#", pstrTSDID ]];
// only add an alarm if one hasn't been created already
if ([[myEvent alarms] count] == 0)
{
EKAlarm *reminder = [EKAlarm alarmWithRelativeOffset:-2*60*60];
[myEvent addAlarm:reminder];
}
When creating a whole bunch of EKEvents (about 30 in a row) I don't get the EXC_BAD_ACCESS error, however when updating events I get the EXC_BAD_ACCESS error intermittently. Sometimes it is on the first update, and sometimes I am able to update 10 before seeing the error, which then crashes my app.
I suspect it may have something to do with the foundEvent variable not being retained, however my project is using ARC so it is my understanding that I don't need to do any memory management tasks. Unless ARC is getting confused with the way the event variable is being cast and then passed around in the loop in getEventWithURL?
For full disclosure, I do have Enable Zombie Objects enabled and the stack trace that I see doesn't reference any of my methods specifically, it starts at start_wqthread and then references some EKEventStore _databasechangedexternally internal methods.
For what it's worth I wasn't able to figure out what the issue was with modifying the events so I am instead deleting the event (if it exists) and creating a new one. My getEventWithURL method is now called deleteEventWithURL which does the removal of the event from the store. The app is no longer crashing after making this change.
Related
Hi I'm making a synchronise function that update database when receive JSON response from server. I want the import only take place if there are different data (new record or update existing record) (To increase performance) (Using coredata and magicalRecord)
Here is my JSON parser method
- (void)updateWithApiRepresentation:(NSDictionary *)json
{
self.title = json[#"Name"];
self.serverIdValue = [json[#"Id"] integerValue];
self.year = json[#"Year of Release"];
self.month = json[#"Month of Release"];
self.day = json[#"Day of Release"];
self.details = json[#"Description"];
self.coverImage = json[#"CoverImage"];
self.thumbnail = json[#"Thumbnail"];
self.price = json[#"Buy"];
NSDateFormatter *formatter = [[NSDateFormatter alloc]init];
[formatter setDateFormat:#"dd/MMMM/yyy"];
NSDate *date = [formatter dateFromString:[NSString stringWithFormat:#"%#/%#/%#",self.day,self.month,self.year]];
self.issueDate = date;
}
And my import method
+ (void)API_getStampsOnCompletion:(void(^)(BOOL success, NSError *error))completionBlock
{
[[ApiClient sharedInstance] getStampsOnSuccess:^(id responseJSON) {
NSManagedObjectContext *localContext = [NSManagedObjectContext MR_context];
NSMutableArray *stamps = [[NSMutableArray alloc]init];
[responseJSON[#"root"] enumerateObjectsUsingBlock:^(id attributes, NSUInteger idx, BOOL *stop) {
Stamp *stamp = [[Stamp alloc]init];
[stamp setOrderingValue:idx];
[stamp updateWithApiRepresentation:attributes];
[stamps addObject:stamp];
}];
[Stamp MR_importFromArray:stamps inContext:localContext];
} onFailure:^(NSError *error) {
if (completionBlock) {
completionBlock(NO, error);
}
}];
}
I'm getting error
CoreData: error: Failed to call designated initializer on NSManagedObject class 'Stamp'
2016-08-02 23:52:20.216 SingPost[2078:80114] -[Stamp setOrdering:]: unrecognized selector sent to instance 0x78f35a30
I have checked my Json parser is working fine. The problem is with my import method. I don't know what wrong with the function. Any help is much appreciate. Thanks!
The error message clearly describes the exact problem. You do this:
Stamp *stamp = [[Stamp alloc]init];
But init is not the designated initializer for NSManagedObject unless you added init in your subclass (which you didn't mention doing). You must call the designated initializer, which is initWithEntity:insertIntoManagedObjectContext:. There's also a convenience factory method on NSEntityDescription called insertNewObjectForEntityForName:inManagedObjectContext:. Either of those will work, but calling init will not.
I'm making an app in which I sync certain events to a calendar on iPhone.
The problem is, I have no way of telling which events were altered/removed/...
So I need to remove all the events between today and the end date of the last event of the calendar before 'syncing' (read inserting) the new events.
As far as I've seen, the only way to do an action on multiple events at once, is by using enumerateEventsMatchingPredicate:usingBlock: and predicateForEventsWithStartDate:endDate:calendars:
But for this I need a specific end date. (and thus, the end date of the last event in my calendar)
I could always save the event identifier of the last event I insert into this calendar, but I would rather not do this:
If the user uninstalls my app and installs it again later, I don't have the last event identifier anymore. (given that (s)he didn't remove the calendar manually of course)
I could just remove the calendar every time I need to sync the calendar, but then I would lose all passed events.
Any ideas or tips are much appreciated!
For your comment on :
I can't seem to find any way to fetch all the events of a calendar.
Actually you can fetch all the events from calendar :
NSDate *start = ...
NSDate *finish = ...
// use Dictionary for remove duplicates produced by events covered more one year segment
NSMutableDictionary *eventsDict = [NSMutableDictionary dictionaryWithCapacity:1024];
NSDate* currentStart = [NSDate dateWithTimeInterval:0 sinceDate:start];
int seconds_in_year = 60*60*24*365;
// enumerate events by one year segment because iOS do not support predicate longer than 4 year !
while ([currentStart compare:finish] == NSOrderedAscending) {
NSDate* currentFinish = [NSDate dateWithTimeInterval:seconds_in_year sinceDate:currentStart];
if ([currentFinish compare:finish] == NSOrderedDescending) {
currentFinish = [NSDate dateWithTimeInterval:0 sinceDate:finish];
}
NSPredicate *predicate = [eventStore predicateForEventsWithStartDate:currentStart endDate:currentFinish calendars:nil];
[eventStore enumerateEventsMatchingPredicate:predicate
usingBlock:^(EKEvent *event, BOOL *stop) {
if (event) {
[eventsDict setObject:event forKey:event.eventIdentifier];
}
}];
currentStart = [NSDate dateWithTimeInterval:(seconds_in_year + 1) sinceDate:currentStart];
}
NSArray *events = [eventsDict allValues];
I am trying to list out the Name, Location, and Notes from calendar events. Reading and writing the Name and Notes work as expected but I run into problems with the Location field.
Specifically, the following line "meetingLocation = [element location];" produces the error
"Multiple methods named 'location' found with mismatched result, parameter type or attributes."
What is wrong here? Code is included below.
-(IBAction)reloadEvents:(id)sender {
NSString *meetingName;
NSString *meetingLocation;
NSString *meetingNotes;
// Define a range of event dates we want to display
NSDate *startDate = [NSDate dateWithTimeIntervalSinceNow:(-1*60*60*.5)]; // .5 hour in the past
NSDate *endDate = [NSDate dateWithTimeIntervalSinceNow:(60*60*24*1)]; // 1 day from now
//NSDate *endDate = [NSDate dateWithTimeIntervalSinceNow:(60*60*24*7)]; // 7 days from now
// Create a predicate to search all celndars with our date range using the start date/time of the event
NSPredicate *predicate = [self.eventStore predicateForEventsWithStartDate:startDate endDate:endDate calendars:nil];
// Query the event store using the predicate.
NSArray *results = [self.eventStore eventsMatchingPredicate:predicate];
// Convert the results to a mutable array and store so we can implement swipe to delete
//NSMutableArray *events = [[NSMutableArray alloc] initWithArray:results];
//self.events = events;
NSEnumerator * enumerator = [results objectEnumerator];
id element;
while(element = [enumerator nextObject])
{
// Set the meeting name
meetingName = [element title];
NSLog(#"Name=%#",meetingName);
// Set the meeting location
meetingLocation = [element location];
NSLog(#"Location=%#",meetingLocation);
// Set the meeting notes
meetingNotes = [element notes];
NSLog(#"Notes=%#",meetingNotes);
}
}
Try like this
while(element = [enumerator nextObject])
{
EKEvent *event = element;
meetingName = event.location;
}
Similar problem converting some old iOS 5 to iOS7:
if ([[thisEvent.recurrenceRules objectAtIndex:i] frequency] == EKRecurrenceFrequencyDaily ){
resulted in
Multiple methods names "frequency" found with mismatched result.
Resolved by typecasting and then doing the if statement
EKRecurrenceRule *thisRecurranceRule = (EKRecurrenceRule *)[thisEvent.recurrenceRules objectAtIndex:i] ;
if ([thisRecurranceRule frequency] == EKRecurrenceFrequencyDaily ){
I am listing the events in my app. User can create, edit and delete the events. In viewDidLoad method I fetch all events I need and push them into an array. It works like expected.
For creating, editing and deleting events I use EKEventEditViewController and EKEventViewController which works pretty well. In delegate methods of the controllers I make the changes I need on my array and reload my view.
Of course I would like also know and handle, if user make some changes from another app (like built-in calendar app). So I observe EKEventStoreChangedNotification. From that notification I get only "changes have been occurred" and not which event or from which app. Actually what I want to know is, if the change has been occurred from my app or another app and which events have been changed. Since I already handle the changes(from my app) in EKEventEditViewControllerDelegate method, I do not need to handle them again.
If I do not know which objects have been changed, I have to fetch ans sort all of them.
For now I have only 5 events in the calendar(development device), of course it is not a problem to fetch and sort all events, but if user has more then 1000, it is overkill for maybe only one event change.
So my question is: How to handle EKEventStoreChangedNotification?
You can detect exactly which event has been changed by the following code [Disclaimer code is not my idea, I have found it in another Stack Overflow answer and modified it a little bit].
I'm using a lib called "JSCalendarManager" for interaction with eventstore and in my case as the events created using my App and synced with iCalendar I already saved their eventIdentifier in local DB , I can retrieve my time bound to search for events in iCalendar and get match for changed one.
+(void)iCloudStoreChanged:(NSNotification*)eventStoreChangeNotification{
NSArray* allScheduleRecords =[self getAllScheduleRecordSyncedToICalendar];
NSDate* startDate = [NSDate new];
NSDate* endDate = [NSDate new];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:#"yyyy-MM-dd HH:mm:ss"];
if (allScheduleRecords.count >= 2) {
startDate = [dateFormatter dateFromString:[[allScheduleRecords firstObject] objectForKey:#"meetingTime"]];
endDate = [dateFormatter dateFromString:[[allScheduleRecords lastObject] objectForKey:#"meetingTime"]];
}else if (allScheduleRecords.count > 0){
startDate = [dateFormatter dateFromString:[[allScheduleRecords firstObject] objectForKey:#"meetingTime"]];
NSDate *today = [NSDate date];
NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *components = [gregorian components:(NSEraCalendarUnit | NSYearCalendarUnit | NSMonthCalendarUnit) fromDate:today];
components.day = 1;
endDate = [gregorian dateFromComponents:components];
}else{
}
NSArray *ekEventStoreChangedObjectIDArray = [eventStoreChangeNotification.userInfo objectForKey:#"EKEventStoreChangedObjectIDsUserInfoKey"];
[calendarManager findEventsBetween:startDate
and:endDate
withSearchHandler:^(BOOL found, NSError *error, NSArray *eventsArray) {
[eventsArray enumerateObjectsUsingBlock:^(EKEvent *ekEvent, NSUInteger idx, BOOL *stop) {
// Check this event against each ekObjectID in notification
[ekEventStoreChangedObjectIDArray enumerateObjectsUsingBlock:^(NSString *ekEventStoreChangedObjectID, NSUInteger idx, BOOL *stop) {
NSObject *ekObjectID = [(NSManagedObject *)ekEvent objectID];
if ([ekEventStoreChangedObjectID isEqual:ekObjectID]) {
// Log the event we found and stop (each event should only exist once in store)
NSLog(#"calendarChanged(): Event Changed: title:%#", ekEvent.title);
[self updateAppointmentForEvent:ekEvent];
*stop = YES;
}
}];
}];
}];}
Instead of fetching all events, can you not update only the events that are onscreen/active.
So in my app I rely heavily on iCal, and I can add events using EventStore, but only to the "defaultCalendarForNewEvents". I want to make a new calendar just for the events I create in the app, let's say MyApp calendar, which would behave much like the iCal calendars like "Home", "Work", etc.
Is there a way to do this programmatically?
Right now, I've tried this:
EKEventStore *eventStore = [[EKEventStore alloc] init];
NSArray *calendars = [eventStore calendars];
BOOL calendarHasBeenInitialized = NO;
for(NSCalendar *cal in calendars)
{
if([cal.calendarIdentifier isEqualToString:#"Workout Tracker"])
{
calendarHasBeenInitialized = YES;
}
}
if(!calendarHasBeenInitialized)
{
NSString *string = [[NSString alloc] initWithString:#"Workout Tracker"];
NSCalendar *workoutCalendar = (__bridge NSCalendar *)(CFCalendarCreateWithIdentifier(kCFAllocatorSystemDefault, (__bridge CFStringRef)string));
EKCalendar *ekcalendar = (EKCalendar *)workoutCalendar;
NSError *error;
[eventStore saveCalendar:ekcalendar commit:YES error:&error];
}
This is called in my App Delegate where if the calendar is not in the calendars array, I attempt to create it. This however, does not work.
Any help would be appreciated!
According to the docs, use EKCalendar's +calendarWithEventStore: method to create a new calendar in the event store you specify. I expect it'd go like this:
EKCalendar *newCalendar = [EKCalendar calendarWithEventStore:eventStore];