iOS EKEvent事件與提醒

最近項(xiàng)目要使用提醒服務(wù)，研究了一下EKEvent，記錄下來(lái)，以備以后查找

首先 Info.plist文件中注冊(cè)權(quán)限

<key>NSCalendarsUsageDescription</key>
    <string>調(diào)用日歷權(quán)限</string>
    <key>NSRemindersUsageDescription</key>
    <string>調(diào)用提醒事件</string>

申請(qǐng)了權(quán)限之后，就可以創(chuàng)建事件了，直接上代碼
首先導(dǎo)入頭文件

import <EventKit/EventKit.h>

第一步
 ///生成事件數(shù)據(jù)庫(kù)對(duì)象
    EKEventStore *store = [[EKEventStore alloc] init];
  
  第二步
  //申請(qǐng)事件類型權(quán)限 
  //EKEntityTypeEvent 事件類型 
  //EKEntityTypeReminder 提醒類型
    
    [store requestAccessToEntityType:(EKEntityTypeEvent) completion:^(BOOL granted, NSError * _Nullable error) {
      dispatch_async(dispatch_get_main_queue(), ^{
      第三步
      判斷時(shí)間類型權(quán)限結(jié)果，有權(quán)限情況下，去創(chuàng)建事件
                if (error) {
                    NSLog(@"添加失敗，，錯(cuò)誤了。。。");
                } else if (!granted) {
                    NSLog(@"不允許使用日歷，沒有權(quán)限");
                } else {
                    
                    EKEvent *event = [EKEvent eventWithEventStore:store];
                    event.title = @"這是一個(gè) title";
                    event.location = @"這是一個(gè) location";
                    event.notes = @"這是一個(gè) notes";
                    
                    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
                    [formatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
                    
                    NSDate *date = [formatter dateFromString:@"2019-04-13 11:22:33"];
                    
                    // 提前一個(gè)小時(shí)開始
                    NSDate *startDate = [NSDate dateWithTimeInterval:-3600 sinceDate:date];
                    // 提前一分鐘結(jié)束
                    NSDate *endDate = [NSDate dateWithTimeInterval:60 sinceDate:date];
                    
                    event.startDate = startDate;
                    event.endDate = endDate;
                    event.allDay = NO;
                    
                    // 添加鬧鐘結(jié)合（開始前多少秒）若為正則是開始后多少秒。
                    EKAlarm *elarm2 = [EKAlarm alarmWithRelativeOffset:-20];
                    [event addAlarm:elarm2];
                    EKAlarm *elarm = [EKAlarm alarmWithRelativeOffset:-10];
                    [event addAlarm:elarm];
                    
                    [event setCalendar:[store defaultCalendarForNewEvents]];
                    
                    NSError *error = nil;
                    [store saveEvent:event span:EKSpanThisEvent error:&error];
                    
                    if (!error) {
                        NSLog(@"添加時(shí)間成功");
                        //添加成功后需要保存日歷關(guān)鍵字
                        NSString *iden = event.eventIdentifier;
                        // 保存在沙盒，避免重復(fù)添加等其他判斷
                        [[NSUserDefaults standardUserDefaults] setObject:iden forKey:@"my_eventIdentifier"];
                        [[NSUserDefaults standardUserDefaults] synchronize];
                    }else{
                        NSLog(@"添加時(shí)間失敗:%@",error);
                    }
                    
                }
            });
      
    }];

另外我們可以根據(jù)id在事件數(shù)據(jù)庫(kù)中查詢事件

EKEventStore *myEventStore = [[EKEventStore alloc] init];
    // 獲取上面的這個(gè)ID呀。
    NSString *identifier = [NSString stringWithFormat:@"%@",[[NSUserDefaults standardUserDefaults] objectForKey:@"my_eventIdentifier"]];
    EKEvent *event = [myEventStore eventWithIdentifier:identifier];
    NSLog(@"查詢到的事件 ：%@",event);

既然是數(shù)據(jù)庫(kù) 肯定增刪改查都是可以，上邊兩個(gè)是增加和查找，我們接著說修改和刪除，既然我們可以查找到事件，就可以拿當(dāng)前時(shí)間去修改，刪除。

修改

 EKEvent *event = [self queryEKEventForIdentifier];
    if (event) {
        event.title = @"修改的標(biāo)題";
        NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
        [formatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
        
        NSDate *date = [formatter dateFromString:@"2019-05-13 11:22:33"];
        // 提前一個(gè)小時(shí)開始
        NSDate *startDate = [NSDate dateWithTimeInterval:-3600 sinceDate:date];
        // 提前一分鐘結(jié)束
        NSDate *endDate = [NSDate dateWithTimeInterval:60 sinceDate:date];
        
        event.startDate = startDate;
        event.endDate = endDate;
 
        [event setCalendar:[self.myEventStore defaultCalendarForNewEvents]];
        dispatch_async(dispatch_get_main_queue(), ^{
            NSError *error = nil;
            [self.myEventStore saveEvent:event span:EKSpanThisEvent error:&error];
            if (!error) {
                NSLog(@"修改成功");
            }else{
                NSLog(@"添加時(shí)間失敗:%@",error);
            }
        });
        
    }

刪除

 __block EKEvent *event = [self queryEKEventForIdentifier];
    __block BOOL isDeleted = NO;
    dispatch_async(dispatch_get_main_queue(), ^{
        NSError *err = nil;
        isDeleted = [self.myEventStore removeEvent:event span:EKSpanThisEvent commit:YES error:&err];
        if (!err && isDeleted) {
            NSLog(@"刪除日歷成功");
            [[NSUserDefaults standardUserDefaults] removeObjectForKey:@"my_eventIdentifier"];
            [[NSUserDefaults standardUserDefaults] synchronize];
        }
    });

除了可以日歷事件，還可以添加提醒事件

 //申請(qǐng)?zhí)嵝褭?quán)限
    [self.myEventStore requestAccessToEntityType:EKEntityTypeReminder completion:^(BOOL granted, NSError * _Nullable error) {
        
        if (granted) {
            //創(chuàng)建一個(gè)提醒功能
            
            EKReminder *reminder = [EKReminder reminderWithEventStore:self.myEventStore];
            //標(biāo)題
            
            reminder.title = title;
            //添加日歷
            
            [reminder setCalendar:[self.myEventStore defaultCalendarForNewReminders]];
            
            NSCalendar *cal = [NSCalendar currentCalendar];
            
            [cal setTimeZone:[NSTimeZone systemTimeZone]];
            
            NSInteger flags = NSCalendarUnitYear | NSCalendarUnitMonth |
            
            NSCalendarUnitDay |NSCalendarUnitHour | NSCalendarUnitMinute |
            
            NSCalendarUnitSecond;
            
            NSDateComponents* dateComp = [cal components:flags fromDate:date];
            
            dateComp.timeZone = [NSTimeZone systemTimeZone];
            
            reminder.startDateComponents = dateComp; //開始時(shí)間
            
            reminder.dueDateComponents = dateComp; //到期時(shí)間
            
            reminder.priority = 1; //優(yōu)先級(jí)
            NSMutableArray *weekArr = [NSMutableArray array];
            NSArray *weeks = @[@1,@2,@3];//1代表周日以此類推
            //  也可以寫成NSArray *weekArr = @[@(EKWeekdaySunday),@(EKWeekdayMonday),@(EKWeekdayTuesday)];
            [weeks enumerateObjectsUsingBlock:^(NSNumber * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
                EKRecurrenceDayOfWeek *daysOfWeek = [EKRecurrenceDayOfWeek dayOfWeek:obj.integerValue];
                [weekArr addObject:daysOfWeek];
            }];
            //創(chuàng)建重復(fù)需要用到 EKRecurrenceRule
            //EKRecurrenceFrequencyDaily, 周期為天
            //EKRecurrenceFrequencyWeekly, 周期為周
            //EKRecurrenceFrequencyMonthly, 周期為月
            //EKRecurrenceFrequencyYearly  周期為年
            
            // EKRecurrenceRule *rule = [[EKRecurrenceRule alloc]initRecurrenceWithFrequency:EKRecurrenceFrequencyWeekly interval:1 daysOfTheWeek:weekArr daysOfTheMonth:nil monthsOfTheYear:nil weeksOfTheYear:nil daysOfTheYear:nil setPositions:nil end:nil];
            
            //每天
            EKRecurrenceRule *rule = [[EKRecurrenceRule alloc] initRecurrenceWithFrequency:(EKRecurrenceFrequencyDaily) interval:1 end:nil];
            [reminder addRecurrenceRule:rule];
            
            EKAlarm *alarm = [EKAlarm alarmWithAbsoluteDate:date]; //添加一個(gè)鬧鐘
            
            [reminder addAlarm:alarm];
            
            NSError *err;
            
            [self.myEventStore saveReminder:reminder commit:YES error:&err];
            
            if (err) {
                
                
            }
            
        }
        
    }];

另外我們可以直接喚起系統(tǒng)的創(chuàng)建 事件UI，需要導(dǎo)入頭文件

import <EventKitUI/EventKitUI.h>

 EKEventStore *eventStore = self.myEventStore;
    if([eventStore respondsToSelector:@selector(requestAccessToEntityType:completion:)]) {
        //EKEntityTypeEvent 事件頁(yè)面
        //EKEntityTypeReminder 提醒頁(yè)面
        [eventStore requestAccessToEntityType:EKEntityTypeEvent completion:^(BOOL granted,NSError* error){
            if(!granted){
                dispatch_async(dispatch_get_main_queue(), ^{
                    //TODO: 提示需要權(quán)限
                });
            }else{
                
                EKEvent *event = [EKEvent eventWithEventStore:eventStore];
                event.title = @"日歷標(biāo)題";
                
                EKCalendar* calendar;
                calendar = [EKCalendar calendarForEntityType:EKEntityTypeEvent eventStore:eventStore];
                NSError* error;
                [eventStore saveCalendar:calendar commit:YES error:&error];
                
                EKEventEditViewController *addController = [[EKEventEditViewController alloc] initWithNibName:nil bundle:nil];
                addController.event = event;
                addController.eventStore = eventStore;
                
                [self presentViewController:addController animated:YES completion:nil];
                addController.editViewDelegate = self;
            }
        }];
    }

記得實(shí)現(xiàn)代理方法

#pragma mark - eventEditDelegates -
- (void)eventEditViewController:(EKEventEditViewController *)controller didCompleteWithAction:(EKEventEditViewAction)action{
    if (action ==EKEventEditViewActionCanceled) {
        [self dismissViewControllerAnimated:YES completion:nil];
    }
    if (action==EKEventEditViewActionSaved) {
        [self dismissViewControllerAnimated:YES completion:nil];
    }
}

另附demo地址
demo地址

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