Swift-如何創建首次應用啟動本地通知？

Question

我已經在didFinishLaunchingWithOptions中添加了這些

let notificationSettings = UIUserNotificationSettings(forTypes: [.Alert, .Badge, .Sound], categories: nil)
UIApplication.sharedApplication().registerUserNotificationSettings(notificationSettings)
self.createLocalNotification()

然后，調用下面的函數。

func createLocalNotification() {

    let localNotification = UILocalNotification()

    localNotification.fireDate = NSDate(timeIntervalSinceNow: 3)
    // localNotification.applicationIconBadgeNumber = 1
    localNotification.soundName = UILocalNotificationDefaultSoundName

    localNotification.userInfo = [
        "id": "not_id0",
        "message": "Check notification"
    ]

    localNotification.alertBody = "Check notification"
    UIApplication.sharedApplication().scheduleLocalNotification(localNotification)

}

要取消此通知，我在下面的didReceiveLocalNotification中進行了嘗試，但每次啟動App時仍顯示通知。

       let app:UIApplication = UIApplication.sharedApplication()
        for oneEvent in app.scheduledLocalNotifications! {
            let notification = oneEvent as UILocalNotification
            let userInfoCurrent = notification.userInfo! as! [String:AnyObject]
            let id = userInfoCurrent["id"]! as! String
            if id == "not_id0" {
                //Cancelling local notification
                app.cancelLocalNotification(notification)
                break;
            }
        }

如何創建首次本地通知？ 如果有人解釋，那就太好了。

Answer 1

在userDefaults中添加標志，然后檢查是否

NSUserDefaults.standardUserDefaults().boolForKey("notified")

如果沒有，請打開通知方法並在那里

NSUserDefaults.standardUserDefaults().setBool(true, forKey: "notified")

Answer 2

您可以這樣使用NSUserDefaults ：

在您的AppDelegate didFinishLaunchingWithOptions:中：

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
    ...

    if let haveShownFirstRunNotification = NSUserDefaults.standardUserDefaults().boolForKey("haveShownFirstRunNotification") {
        if !haveShownFirstRunNotification {
            createLocalNotification()
        }
    }
    ...
}

在createLocalNotification ：

func createLocalNotification() {

    ...

    NSUserDefaults.standardUserDefaults().setBool(true, forKey: "haveShownFirstRunNotification")
}