迅捷布尔自行改变

时间:2017-02-17 12:16:11

标签: ios swift cocoa-touch uiviewcontroller eventkit

我有这个奇怪的错误。我有一个名为Bool的全球CalendarAccess

var EventStore: EKEventStore!
var Calendar: NSCalendar!
var CalendarAccessRequestComplete = false
var _CalendarAccess = false
var CalendarAccess: Bool {
    set(value)
    {
        _CalendarAccess = value;
    }
    get {
        return _CalendarAccess;
    }
}

正如你所看到的,我为它做了一个setter和getter所以我可以设置一个断点来查看它的设置位置。我这样做了,每次遇到断点时,值都是true。我确定我从未直接设置_CalendarAccess因为此变量直到刚才被称为CalendarAccess

但是,当我在视图控制器中执行以下操作时,CalendarAccessfalse

@IBAction func saveEvent(_ sender: Any) {

    if(CalendarAccess)
    {
        let event = EKEvent(eventStore: EventStore)
        event.title = "My Event"
        event.startDate = Date();
        event.endDate = Calendar.date(byAdding: .hour, value: 1, to: Date(), options: .matchFirst)!
        event.notes = "A note"
        event.calendar = EventStore.defaultCalendarForNewEvents
        do
        {
            try EventStore.save(event, span: .thisEvent)
        } catch
        {
            print("Unable to save event")
        }
    }
    else
    {
        ErrorAlert(title: "No calendar access", text: "Please give the app access to your calendar. You can do that in your iOS device's settings.")
    }
}

我不知道这是怎么可能的 - 变量是一个与任何视图或控制器无关的全局变量。

最后一个代码块来自的控制器以模态方式呈现,如果该信息完全有用的话。

编辑: CalendarAccess仅在一个地方设置(AppDelegate):

func updateCalendarAccess()
{
    Calendar = NSCalendar.current as NSCalendar!
    CalendarAccessRequestComplete = false

    EventStore = EKEventStore()
    EventStore.requestAccess(to: .event, completion: {
        (access: Bool, e: Error?) in

        CalendarAccessRequestComplete = true

        CalendarAccess = access;

        return

    })

    while(!CalendarAccessRequestComplete) { }
}

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey : Any]? = nil) -> Bool {

    // Override point for customization after application launch.

    updateCalendarAccess()

    return true
}

编辑:当我点按调用@IBAction func saveEvent的按钮时收到这些消息:

2017-02-17 13:58:00.980237 Calendar[16695:5163026] [MC] System group container for systemgroup.com.apple.configurationprofiles path is /private/var/containers/Shared/SystemGroup/systemgroup.com.apple.configurationprofiles
2017-02-17 13:58:00.989165 Calendar[16695:5163026] [MC] Reading from public effective user settings.

编辑:当我关闭模态显示的视图控制器(具有saveEvent func的视图控制器)并记录CalendarAccess的值时,它再次成立。并且没有命中setter断点。

编辑:当我呈现VC时,似乎_CalendarAccess的值会回到初始值。如果我将var _CalendarAccess = false更改为var _CalendarAccess = true,那么在呈现VC时就是如此。此外,当VC出现时,Calendar变量为nil,但不是。{/ p>

1 个答案:

答案 0 :(得分:2)

Project包含同名框架,这导致编译器在多个位置查找相同的值。删除框架,问题解决了:))