Answers:
根据Apple文档,自iOS 6.0起,此更改有所改变。
1)您应该通过“ requestAccessToEntityType:completion:”请求访问用户日历,并在块内部执行事件处理。
2)您需要立即提交活动或将“提交”参数传递给保存/删除调用
其他一切都保持不变...
将EventKit框架添加#import <EventKit/EventKit.h>到您的代码中。
在我的示例中,我有一个NSString * savedEventId实例属性。
要添加事件:
    EKEventStore *store = [EKEventStore new];
    [store requestAccessToEntityType:EKEntityTypeEvent completion:^(BOOL granted, NSError *error) {
        if (!granted) { return; }
        EKEvent *event = [EKEvent eventWithEventStore:store];
        event.title = @"Event Title";
        event.startDate = [NSDate date]; //today
        event.endDate = [event.startDate dateByAddingTimeInterval:60*60];  //set 1 hour meeting
        event.calendar = [store defaultCalendarForNewEvents];
        NSError *err = nil;
        [store saveEvent:event span:EKSpanThisEvent commit:YES error:&err];
        self.savedEventId = event.eventIdentifier;  //save the event id if you want to access this later
    }];删除事件:
    EKEventStore* store = [EKEventStore new];
    [store requestAccessToEntityType:EKEntityTypeEvent completion:^(BOOL granted, NSError *error) {
        if (!granted) { return; }
        EKEvent* eventToRemove = [store eventWithIdentifier:self.savedEventId];
        if (eventToRemove) {
            NSError* error = nil;
            [store removeEvent:eventToRemove span:EKSpanThisEvent commit:YES error:&error];
        }
    }];这会将事件添加到默认日历中,如果您有多个日历,那么您将找出哪个是
迅捷版
您需要导入EventKit框架
import EventKit新增活动
let store = EKEventStore()
store.requestAccessToEntityType(.Event) {(granted, error) in
    if !granted { return }
    var event = EKEvent(eventStore: store)
    event.title = "Event Title"
    event.startDate = NSDate() //today
    event.endDate = event.startDate.dateByAddingTimeInterval(60*60) //1 hour long meeting
    event.calendar = store.defaultCalendarForNewEvents
    do {
        try store.saveEvent(event, span: .ThisEvent, commit: true)
        self.savedEventId = event.eventIdentifier //save event id to access this particular event later
    } catch {
        // Display error to user
    }
}移除活动
let store = EKEventStore()
store.requestAccessToEntityType(EKEntityTypeEvent) {(granted, error) in
    if !granted { return }
    let eventToRemove = store.eventWithIdentifier(self.savedEventId)
    if eventToRemove != nil {
        do {
            try store.removeEvent(eventToRemove, span: .ThisEvent, commit: true)
        } catch {
            // Display error to user
        }
    }
}您可以使用OS 4.0中的事件工具包框架来执行此操作。
右键单击窗口左侧的“组和文件”导航器中的“ FrameWorks”组。选择“添加”,然后选择“现有FrameWorks”,然后选择“ EventKit.Framework”。
然后,您应该能够使用以下代码添加事件:
#import "EventTestViewController.h"
#import <EventKit/EventKit.h>
@implementation EventTestViewController
- (void)viewDidLoad {
    [super viewDidLoad];
    EKEventStore *eventStore = [[EKEventStore alloc] init];
    EKEvent *event  = [EKEvent eventWithEventStore:eventStore];
    event.title     = @"EVENT TITLE";
    event.startDate = [[NSDate alloc] init];
    event.endDate   = [[NSDate alloc] initWithTimeInterval:600 sinceDate:event.startDate];
    [event setCalendar:[eventStore defaultCalendarForNewEvents]];
    NSError *err;
    [eventStore saveEvent:event span:EKSpanThisEvent error:&err];       
}
@end是的,仍然没有针对此的API(2.1)。但是似乎在WWDC上,很多人(包括我自己)已经对功能感兴趣,建议您转到以下站点并为此创建功能请求。如果有足够的兴趣,他们最终可能会将ICal.framework移至公共SDK。
Calendar Access
Apps现在可以使用事件工具包直接在Calendar应用程序中创建和编辑事件。
创建重复事件,设置开始和结束时间,并将它们分配给设备上的任何日历。
您可以使用Event API(如Tristan所述)添加事件,也可以添加显示在iOS日历中的Google Calendar事件。
  - (void)addAnEvent {
  // Make a new event, and show it to the user to edit
  GTLCalendarEvent *newEvent = [GTLCalendarEvent object];
  newEvent.summary = @"Sample Added Event";
  newEvent.descriptionProperty = @"Description of sample added event";
  // We'll set the start time to now, and the end time to an hour from now,
  // with a reminder 10 minutes before
  NSDate *anHourFromNow = [NSDate dateWithTimeIntervalSinceNow:60*60];
  GTLDateTime *startDateTime = [GTLDateTime dateTimeWithDate:[NSDate date]
                                                    timeZone:[NSTimeZone systemTimeZone]];
  GTLDateTime *endDateTime = [GTLDateTime dateTimeWithDate:anHourFromNow
                                                  timeZone:[NSTimeZone systemTimeZone]];
  newEvent.start = [GTLCalendarEventDateTime object];
  newEvent.start.dateTime = startDateTime;
  newEvent.end = [GTLCalendarEventDateTime object];
  newEvent.end.dateTime = endDateTime;
  GTLCalendarEventReminder *reminder = [GTLCalendarEventReminder object];
  reminder.minutes = [NSNumber numberWithInteger:10];
  reminder.method = @"email";
  newEvent.reminders = [GTLCalendarEventReminders object];
  newEvent.reminders.overrides = [NSArray arrayWithObject:reminder];
  newEvent.reminders.useDefault = [NSNumber numberWithBool:NO];
  // Display the event edit dialog
  EditEventWindowController *controller = [[[EditEventWindowController alloc] init] autorelease];
  [controller runModalForWindow:[self window]
                          event:newEvent
              completionHandler:^(NSInteger returnCode, GTLCalendarEvent *event) {
                // Callback
                if (returnCode == NSOKButton) {
                  [self addEvent:event];
                }
              }];
}Swift 4.0的实现:
在页面顶部使用import import EventKit
然后
@IBAction func addtoCalendarClicked(sender: AnyObject) {
    let eventStore = EKEventStore()
    eventStore.requestAccess( to: EKEntityType.event, completion:{(granted, error) in
        if (granted) && (error == nil) {
            print("granted \(granted)")
            print("error \(error)")
            let event = EKEvent(eventStore: eventStore)
            event.title = "Event Title"
            event.startDate = Date()
            event.endDate = Date()
            event.notes = "Event Details Here"
            event.calendar = eventStore.defaultCalendarForNewEvents
            var event_id = ""
            do {
                try eventStore.save(event, span: .thisEvent)
                event_id = event.eventIdentifier
            }
            catch let error as NSError {
                print("json error: \(error.localizedDescription)")
            }
            if(event_id != ""){
                print("event added !")
            }
        }
    })
}更新Dashrath答案的Swift 4
import UIKit
import EventKit
class ViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        let eventStore = EKEventStore()
        eventStore.requestAccess( to: EKEntityType.event, completion:{(granted, error) in
            if (granted) && (error == nil) {
                let event = EKEvent(eventStore: eventStore)
                event.title = "My Event"
                event.startDate = Date(timeIntervalSinceNow: TimeInterval())
                event.endDate = Date(timeIntervalSinceNow: TimeInterval())
                event.notes = "Yeah!!!"
                event.calendar = eventStore.defaultCalendarForNewEvents
                var event_id = ""
                do{
                    try eventStore.save(event, span: .thisEvent)
                    event_id = event.eventIdentifier
                }
                catch let error as NSError {
                    print("json error: \(error.localizedDescription)")
                }
                if(event_id != ""){
                    print("event added !")
                }
            }
        })
    }
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
}Swift-4.2中的工作代码
import UIKit
import EventKit
import EventKitUI
class yourViewController: UIViewController{
    let eventStore = EKEventStore()
    func addEventToCalendar() {
    eventStore.requestAccess( to: EKEntityType.event, completion:{(granted, error) in
        DispatchQueue.main.async {
            if (granted) && (error == nil) {
                let event = EKEvent(eventStore: self.eventStore)
                event.title = self.headerDescription
                event.startDate = self.parse(self.requestDetails.value(forKey: "session_time") as? String ?? "")
                event.endDate = self.parse(self.requestDetails.value(forKey: "session_end_time") as? String ?? "")
                let eventController = EKEventEditViewController()
                eventController.event = event
                eventController.eventStore = self.eventStore
                eventController.editViewDelegate = self
                self.present(eventController, animated: true, completion: nil)
            }
        }
       })
    }
}现在,我们将获得事件屏幕,在这里您还可以修改设置:
现在添加委托方法来处理取消,并添加事件屏幕的事件按钮动作:
    extension viewController: EKEventEditViewDelegate {
    func eventEditViewController(_ controller: EKEventEditViewController, didCompleteWith action: EKEventEditViewAction) {
        controller.dismiss(animated: true, completion: nil)
    }
}注意:不要忘记将NSCalendarsUsageDescription键添加到info plist中。
请记住,将endDate设置为创建的事件,这是强制性的。
否则它将(几乎无提示)失败并显示以下错误:
"Error Domain=EKErrorDomain Code=3 "No end date has been set." UserInfo={NSLocalizedDescription=No end date has been set.}"对我来说,完整的工作代码是:
EKEventStore *store = [EKEventStore new];
[store requestAccessToEntityType:EKEntityTypeEvent completion:^(BOOL granted, NSError *error) {
    if (!granted) { return; }
    EKEvent *calendarEvent = [EKEvent eventWithEventStore:store];
    calendarEvent.title = [NSString stringWithFormat:@"CEmprendedor: %@", _event.name];
    calendarEvent.startDate = _event.date;
    // 5 hours of duration, we must add the duration of the event to the API
    NSDate *endDate = [_event.date dateByAddingTimeInterval:60*60*5];
    calendarEvent.endDate = endDate;
    calendarEvent.calendar = [store defaultCalendarForNewEvents];
    NSError *err = nil;
    [store saveEvent:calendarEvent span:EKSpanThisEvent commit:YES error:&err];
    self.savedEventId = calendarEvent.eventIdentifier;  //saving the calendar event id to possibly deleted them
}];简单....使用tapku库....您可以在Google上搜索并使用该词...它的开放源代码...很享受.....无需使用这些代码进行调试....