EKCalendar标题在iOS12中为空

Question

在iOS 12中，我试图列出日历。我可以打印日历ids，但是标题都是空的。我做错了什么？

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        let status = EKEventStore.authorizationStatus(for: EKEntityType.event)

        switch (status) {
        case EKAuthorizationStatus.notDetermined:
            EKEventStore().requestAccess(to: .event, completion: {
                (granted: Bool, error: Error?) in

                if granted != true {
                    print("Access not granted")
                }
            })
        case EKAuthorizationStatus.authorized:
            print("Access granted")
        case EKAuthorizationStatus.restricted, EKAuthorizationStatus.denied:
            print("Access restricted or denied")
        }

        print("Calendars:")
        for c in EKEventStore().calendars(for: EKEntityType.event) {
            print("    \(c.calendarIdentifier):\(c.title)")
        }
    }

Answer 1

我不知道为什么，但这段代码在iOS 12模拟器中显示了事件标题。

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
    let status = EKEventStore.authorizationStatus(for: EKEntityType.event)
    let eventStore = EKEventStore() //<-
    switch (status) {
    case EKAuthorizationStatus.notDetermined:
        eventStore.requestAccess(to: .event, completion: {
            (granted: Bool, error: Error?) in

            if granted != true {
                print("Access not granted")
            }
        })
    case EKAuthorizationStatus.authorized:
        print("Access granted")
    case EKAuthorizationStatus.restricted, EKAuthorizationStatus.denied:
        print("Access restricted or denied")
    }

    print("Calendars:")
    for c in eventStore.calendars(for: EKEntityType.event) {
        print("    \(c.calendarIdentifier):\(c.title)",c)
    }
}

也许，在访问EKEventStore属性时，您需要保持对EKCalendar实例的强烈引用。