這里使用一個日歷事件demo來講述EventKit的使用。下面這個demo就是對日歷事件進行創建和刪除。

執行任何事件設備操作的基本工作流程是首先獲得事件存儲(EventStore)。然后查看是否有權限操作日歷。一旦你有權限,你可以創建、或者閱讀和刪除事件。

• 創建EventStore:

相當于上下文，如果你用一個事件創建一個事件對象存儲,你不能在其他地方使用它與另一個事件存儲在應用程序中.

• 給出權限：

在創建的EventStore中調用authorizationStatusForEntityType()方法來訪問權限，通過entityType訪問Entity實體，如果用戶沒有給我們的應用程序提高權限，就給出是否要訪問。那么如何實現訪問呢？這里是通過entityType和一個函數，如果用戶否認我們的應用程序,該函數不會執行。假設我們獲得許可,我們可以執行操作事件存儲。

• 創建事件（addEvent）

進行創建Event

• 刪除事件（removeEvent）

進行刪除Event

下面讓代碼君出來玩玩了：

import UIKit
import EventKit
class ViewController: UIViewController {
var savedEventId : String = ""

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}


// 創建EKEventStore對象
func createEvent(eventStore: EKEventStore, title: String, startDate: NSDate, endDate: NSDate) {
    let event = EKEvent(eventStore: eventStore)
   
    event.title = title
    event.startDate = startDate
    event.endDate = endDate
    event.calendar = eventStore.defaultCalendarForNewEvents
    do {
        try eventStore.saveEvent(event, span: .ThisEvent)
        savedEventId = event.eventIdentifier
    } catch {
        print("有壞銀！")
    }
}

// 刪除EKEventStore
func deleteEvent(eventStore: EKEventStore, eventIdentifier: String) {
    let eventToRemove = eventStore.eventWithIdentifier(eventIdentifier)
    if (eventToRemove != nil) {
        do {
            try eventStore.removeEvent(eventToRemove!, span: .ThisEvent)
        } catch {
            print("Bad things happened")
        }
    }
}

// 創建事件按鈕
@IBAction func addEvent(sender: UIButton) {
    let eventStore = EKEventStore()
    
    let startDate = NSDate()
    let endDate = startDate.dateByAddingTimeInterval(60 * 60) //一個小時    
    //判斷是否有權限    
    if (EKEventStore.authorizationStatusForEntityType(.Event) != EKAuthorizationStatus.Authorized) {
        eventStore.requestAccessToEntityType(.Event, completion: {
            granted, error in
            self.createEvent(eventStore, title: "BJEvent", startDate: startDate, endDate: endDate)
        })
    } else {
        createEvent(eventStore, title: "BJEvent", startDate: startDate, endDate: endDate)
    }
}


//刪除事件按鈕
    @IBAction func removeEvent(sender: UIButton) {
    let eventStore = EKEventStore()
    if (EKEventStore.authorizationStatusForEntityType(.Event) != EKAuthorizationStatus.Authorized) {
        eventStore.requestAccessToEntityType(.Event, completion: { (granted, error) -> Void in
            self.deleteEvent(eventStore, eventIdentifier: self.savedEventId)
        })
    } else {
        deleteEvent(eventStore, eventIdentifier: savedEventId)
    }

}
}

代碼實在是簡單透了，解釋就不一步一步的了！