Add event reminder and event reminder functions

Add event reminder and event reminder functions

Add event reminder function

 

Effect

 

Source code

/// ViewController. m // Event // Created by YouXianMing on 16/7/12. // Copyright©2016 YouXianMing. all rights reserved. // # import "ViewController. h "# import" CalendarEvent. h "@ interface ViewController () <CalendarEventDelegate> @ end @ implementation ViewController-(void) viewDidLoad {[super viewDidLoad]; NSTimeInterval hour = 60.f * 60.f; NSDate * currentDate = [NSDate date]; CalendarEvent * event = [CalendarEvent new]; event. eventTitle = @ "do not die, do not die"; event. startDate = [NSDate dateWithTimeInterval: hour * 1 sinceDate: currentDate]; event. endDate = [NSDate dateWithTimeInterval: hour * 2 sinceDate: currentDate]; event. alarmDate = [NSDate dateWithTimeInterval: hour * 0.5f sinceDate: currentDate]; event. eventLocation = @ "Beijing"; event. delegate = self; [event save];}-(void) calendarEvent :( CalendarEvent *) event removedStatus :( ECalendarEventStatus) status error :( NSError *) error {if (status = kCalendarEventAccessSavedSucess) {NSLog (@ "saved successfully") ;}}@ end

/// CalendarEvent. h // EventStore // Created by YouXianMing on 16/7/8. // Copyright©2016 XianMing You. all rights reserved. // # import <Foundation/Foundation. h> @ class CalendarEvent; typedef enum: NSUInteger {/*** Have not permission to save the event to system. */kCalendarEventAccessDenied = 1000,/*** Saved the event success. */kCalendarEventAccessSavedSucess,/*** Saved the event failed. */kCalendarEventAccessSavedFailed,/*** Removed the event success. */kCalendarEventAccessRemovedSucess,/*** Removed the event failed. */kCalendarEventAccessRemovedFailed,} ECalendarEventStatus; @ protocol CalendarEventDelegate <NSObject> @ optional/*** The CalendarEvent saved status. ** @ param event CalendarEvent's object. * @ param status Saved status. * @ param error Error infomation. */-(void) calendarEvent :( CalendarEvent *) event savedStatus :( ECalendarEventStatus) status error :( NSError *) error;/*** The CalendarEvent removed status. ** @ param event CalendarEvent's object. * @ param status Removed status. * @ param error Error infomation. */-(void) calendarEvent :( CalendarEvent *) event removedStatus :( ECalendarEventStatus) status error :( NSError *) error; @ end @ interface CalendarEvent: NSObject/*** Event title. */@ property (nonatomic, strong) NSString * eventTitle;/*** Alarm date. */@ property (nonatomic, strong) NSDate * alarmDate;/*** Event start date. */@ property (nonatomic, strong) NSDate * startDate;/*** Event end date. */@ property (nonatomic, strong) NSDate * endDate;/*** Event location. */@ property (nonatomic, strong) NSString * eventLocation;/*** CalendarEvent's delegate. */@ property (nonatomic, weak) id <CalendarEventDelegate> delegate;/*** Save the event to system. */-(void) save;/*** Remove the event. */-(void) remove;/*** To indicate the event have saved or not. ** @ return */-(BOOL) haveSaved; # pragma mark-Constructor method. + (instancetype) calendarEventWithEventTitle :( NSString *) title startDate :( NSDate *) startDate endDate :( NSDate *) endDate; @ end

/// CalendarEvent. m // EventStore /// Created by YouXianMing on 16/7/8. // Copyright©2016 XianMing You. all rights reserved. // # import "CalendarEvent. h "# import <CommonCrypto/CommonDigest. h> # import <EventKit/EventKit. h> @ implementation CalendarEvent-(void) remove {NSString * eventId = [[NSUserDefaults standardUserDefaults] objectForKey: [self storedKey]; if (eventId) {EKEventStore * eventStore = [[EKEventStore alloc] init]; EKEvent * event = [eventStore eventWithIdentifier: eventId]; N SError * error = nil; [eventStore removeEvent: event span: EKSpanThisEvent error: & error]; if (self. delegate & [self. delegate respondsToSelector: @ selector (calendarEvent: removedStatus: error :)]) {dispatch_async (dispatch_get_main_queue (), ^ {[self. delegate calendarEvent: self removedStatus: error? Authorization: kCalendarEventAccessRemovedSucess error: nil] ;}}}- (BOOL) haveSaved {NSString * eventId = [[NSUserDefaults standardUserDefaults] objectForKey: [self storedKey]; if (eventId. length) {return YES;} else {return NO;}-(void) save {NSParameterAssert (self. eventTitle); NSParameterAssert (self. startDate); NSParameterAssert (self. endDate); EKEventStore * eventStore = [[EKEventStore alloc] init]; [eventStore requestAccessToEntityType: EKEntityTypeEvent completion: ^ (BOOL granted, NSError * error) {if (granted) {EKEvent * event = [EKEvent eventWithEventStore: eventStore]; event. calendar = [eventStore defaultCalendarForNewEvents]; event. title = self. eventTitle; event. startDate = self. startDate; event. endDate = self. endDate; self. alarmDate? [Event addAlarm: [EKAlarm alarmWithAbsoluteDate: self. alarmDate]: 0; self. eventLocation. length? Event. location = self. eventLocation: 0; NSError * savedError = nil; if ([eventStore saveEvent: event span: EKSpanThisEvent commit: YES error: & savedError]) {if (self. delegate & [self. delegate respondsToSelector: @ selector (calendarEvent: savedStatus: error :)]) {dispatch_async (dispatch_get_main_queue (), ^ {[self. delegate calendarEvent: self savedStatus: kCalendarEventAccessSavedSucess error: nil] ;}// key value of the stored event [[NSUserDefaults standardUserDefaults] setObject: event. eventIdentifier forKey: [self storedKey];} else {if (self. delegate & [self. delegate respondsToSelector: @ selector (calendarEvent: savedStatus: error :)]) {dispatch_async (dispatch_get_main_queue (), ^ {[self. delegate calendarEvent: self savedStatus: kCalendarEventAccessSavedFailed error: savedError] ;}}} else {if (self. delegate & [self. delegate respondsToSelector: @ selector (calendarEvent: savedStatus: error :)]) {dispatch_async (dispatch_get_main_queue (), ^ {[self. delegate calendarEvent: self savedStatus: kCalendarEventAccessDenied error: error] ;}}}] ;}- (NSString *) storedKey {NSParameterAssert (self. eventTitle); NSParameterAssert (self. startDate); NSParameterAssert (self. endDate); NSString * string = [NSString stringWithFormat: @ "% @", self. eventTitle, self. startDate, self. endDate]; return [self md532BitLower: string];}-(NSString *) md532BitLower :( NSString *) string {const char * cStr = [string UTF8String]; unsigned char result [16]; CC_MD5 (cStr, (unsigned int) strlen (cStr), result); return [[NSString stringWithFormat: @ "% 02X % 02X % 02X % 02X % 02X % 02X % 02X % 02X % 02X % 02X % 02X % 02X % 02X % 02X % 02X % 02X ", result [0], result [1], result [2], result [3], result [4], result [5], result [6], result [7], result [8], result [9], result [10], result [11], result [12], result [13], result [14], result [15] lowercaseString];} + (instancetype) calendarEventWithEventTitle :( NSString *) title startDate :( NSDate *) startDate endDate :( NSDate *) endDate {CalendarEvent * event = [[self class] new]; event. eventTitle = title; event. startDate = startDate; event. endDate = endDate; return event;} @ end