iOS9(swift2.0)教程系列之EventKit

这里使用一个日历事件demo来讲述EventKit的使用。下面这个demo就是对日历事件进行创建和删除。

执行任何事件设备操作的基本工作流程是首先获得事件存储(EventStore)。然后查看是否有权限操作日历。一旦你有权限,你可以创建、或者阅读和删除事件。

  • 创建EventStore:

相当于上下文,如果你用一个事件创建一个事件对象存储,你不能在其他地方使用它与另一个事件存储在应用程序中.

  • 给出权限:

在创建的EventStore中调用authorizationStatusForEntityType()方法来访问权限,通过entityType访问Entity实体,如果用户没有给我们的应用程序提高权限,就给出是否要访问。那么如何实现访问呢?这里是通过entityType和一个函数,如果用户否认我们的应用程序,该函数不会执行。假设我们获得许可,我们可以执行操作事件存储。

  • 创建事件(addEvent)

进行创建Event

  • 删除事件(removeEvent)

进行删除Event

下面让代码君出来玩玩了:

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.
}


// 创建EKEventStore对象
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("有坏银!")
    }
}

// 删除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")
        }
    }
}

// 创建事件按钮
@IBAction func addEvent(sender: UIButton) {
    let eventStore = EKEventStore()
    
    let startDate = NSDate()
    let endDate = startDate.dateByAddingTimeInterval(60 * 60) //一个小时    
    //判断是否有权限    
    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)
    }
}


//删除事件按钮
    @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)
    }

}
}

代码实在是简单透了,解释就不一步一步的了!

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