我使用以下功能来检索我的日历:
func retrieveCalendar() -> EKCalendar? {
appDelegate = UIApplication.sharedApplication().delegate
as? AppDelegate
var myCalendar: EKCalendar?
let calendars = appDelegate!.eventStore!.calendarsForEntityType(EKEntityTypeReminder) as! [EKCalendar]
let filteredCalendars = calendars.filter {$0.title == "MedicalCalendar"}
if filteredCalendars.isEmpty {
println("could not find reminder calendar 'MedicalCalendar'")
return nil
} else {
myCalendar = filteredCalendars[0]
return myCalendar!
}
}
但是,每当我向日历添加新事件时,我都想检查它们是否已存在。我发现最简单的方法是删除所有提醒并再次加载新提醒。我试过了:
self.retrieveCalendar()?.reset()
但它不起作用。如何从日历中删除提醒?(一次一个或一次全部删除)
答案 0 :(得分:2)
要查看提醒,您必须与fetchRemindersMatchingPredicate()
或predicateForRemindersInCalendars
或predicateForIncompleteRemindersWithDueDateStarting:ending:calendars:
predicateForCompletedRemindersWithCompletionDateStarting:ending:calendars:
例如,如果您想要删除过去所有过期的提醒,请使用类似
的内容假设属性:
var calendar : EKCalendar // current calendar
let eventStore : EKEventStore // current event store
码
func removeExpiredReminders() {
let pastPredicate = eventStore.predicateForIncompleteRemindersWithDueDateStarting(nil, ending:NSDate(), calendars:[calendar])
eventStore.fetchRemindersMatchingPredicate(pastPredicate) { foundReminders in
let remindersToDelete = !foundReminders.isEmpty
for reminder in foundReminders as! [EKReminder] {
self.eventStore.removeReminder(reminder, commit: false, error: nil)
}
if remindersToDelete {
self.eventStore.commit(nil)
}
}
}
在循环中,您可以检查更多条件