單擊應用程序圖標時，推送通知應用程序內徽章圖標未更新

Question

我在獲取應用內徽章圖標標簽正確更新時遇到了一些麻煩。 我想要這樣做的東西：

每當收到推送通知時，都會顯示此紅色圖標。 我正確地在iPhone上的應用程序圖標上獲得了推送通知徽章； 但是，僅當我按橫幅上的推送通知時，或者如果我已經在應用程序中時，該應用程序中的紅色圖標才會出現。

我的問題是，如果我按實際的應用程序圖標，它不會出現。 我希望即使在應用程序處於后台的情況下，也要更新應用程序內的標簽，就像facebook應用程序在Notifications Globe圖標上方具有圖標的方式一樣。

我將在AppDelegate中顯示相關方法（省略令牌等）：

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

    let userInfo: AnyObject? = launchOptions?[UIApplicationLaunchOptionsRemoteNotificationKey]
    if userInfo != nil {
        handleRemoteNotifications(application, userInfo: userInfo! as! NSDictionary)
        return true
    }

    if application.applicationState != UIApplicationState.Background {
        let oldPushHandlerOnly = !self.respondsToSelector(Selector("application:didReceiveRemoteNotification:fetchCompletionHandler:"))
        let noPushPayload: AnyObject? = launchOptions?[UIApplicationLaunchOptionsRemoteNotificationKey]
        if oldPushHandlerOnly || noPushPayload != nil {
            PFAnalytics.trackAppOpenedWithLaunchOptionsInBackground(launchOptions, block: nil)             
        }
    }

    return true
}

func handleRemoteNotifications(application: UIApplication, userInfo: NSDictionary) {
    if let type: String = userInfo["type"] as? String {
        switch (type) {
        case "follow":
            NSNotificationCenter.defaultCenter().postNotificationName("commentNotification", object: self)
        case "comment":
            NSNotificationCenter.defaultCenter().postNotificationName("commentNotification", object: self)
        default:
            return
        }
    }
}

func applicationDidBecomeActive(application: UIApplication) {
    if (application.applicationIconBadgeNumber != 0) {
        application.applicationIconBadgeNumber = 0
    }

    let installation = PFInstallation.currentInstallation()
    if installation.badge != 0 {
        installation.badge = 0
        installation.saveEventually()
    }
}

func application(application: UIApplication, didReceiveRemoteNotification userInfo: [NSObject : AnyObject], fetchCompletionHandler handler: (UIBackgroundFetchResult) -> Void) {
    if let badgeNumber: Int = userInfo["badge"] as? Int {
        application.applicationIconBadgeNumber = badgeNumber
    }

    handleRemoteNotifications(application, userInfo: userInfo)

    if application.applicationState == .Inactive {
        PFAnalytics.trackAppOpenedWithRemoteNotificationPayloadInBackground(userInfo, block: nil)
    }

    handler(.NewData)
}

func application(application: UIApplication, didReceiveRemoteNotification userInfo: [NSObject : AnyObject]) {
    if application.applicationState == .Inactive  {
        // The application was just brought from the background to the foreground,
        // so we consider the app as having been "opened by a push notification."
        PFAnalytics.trackAppOpenedWithRemoteNotificationPayloadInBackground(userInfo, block: nil)
        handleRemoteNotifications(application, userInfo: userInfo)
    }
}

在ViewController中 ，我在viewDidAppear中調用方法，並使其在每次接收到推送通知時更新標簽並將數字增加1：

override func viewDidAppear(animated: Bool) {
    super.viewDidAppear(animated)

    followLabelNumber = NSUserDefaults.standardUserDefaults().integerForKey("followNumberKey")
    commentLabelNumber = NSUserDefaults.standardUserDefaults().integerForKey("commentNumberKey")

    NSNotificationCenter.defaultCenter().removeObserver(self, name: "followNotification", object: nil)
    NSNotificationCenter.defaultCenter().addObserver(self, selector:"followNotificationReceived:", name:"followNotification", object: nil)
    NSNotificationCenter.defaultCenter().removeObserver(self, name: "commentNotification", object: nil)
    NSNotificationCenter.defaultCenter().addObserver(self, selector:"commentNotificationReceived:", name:"commentNotification", object: nil)


    self.navigationController?.navigationBarHidden = true
}

func makeIncrementer(forIncrement amount: Int) -> () -> Int {
    var runningTotal = 0
    func incrementer() -> Int {
        runningTotal += amount
        return runningTotal
    }
    return incrementer
}

func followNotificationReceived(notification: NSNotification) {
    if let number = followLabelNumber {
        let aNumber = makeIncrementer(forIncrement: 1)
        followLabelNumber = number + aNumber()
        NSUserDefaults.standardUserDefaults().setInteger(followLabelNumber!, forKey: "followNumberKey")
        NSUserDefaults.standardUserDefaults().synchronize()
        profileNotificationLabel.hidden = false
        profileNotificationLabel.text = String(followLabelNumber!)
        hasReceivedFollowNotification = true
    }
}

func commentNotificationReceived(notification: NSNotification) {
    if let number = commentLabelNumber {
        let aNumber = makeIncrementer(forIncrement: 1)
        commentLabelNumber = number + aNumber()
        NSUserDefaults.standardUserDefaults().setInteger(commentLabelNumber!, forKey: "commentNumberKey")
        NSUserDefaults.standardUserDefaults().synchronize()
        commentsNotificationLabel.hidden = false
        commentsNotificationLabel.text = String(commentLabelNumber!)
        hasReceivedCommentNotification = true
    }
}

deinit {
    NSNotificationCenter.defaultCenter().removeObserver(self)
}

非常感謝任何人的幫助，因為我已經堅持了幾天。

編輯：更改標題

Answer 1

首先，由於您正在使用Parse，因此您不需要自己處理application.applicationIconBadgeNumber ：

//You don't need these...
if (application.applicationIconBadgeNumber != 0) {
    application.applicationIconBadgeNumber = 0
}

//Because these lines will set the application's icon badge to zero
let installation = PFInstallation.currentInstallation()
if installation.badge != 0 {
    installation.badge = 0
    installation.saveEventually()
}

您也不需要：

//Because Parse handles that for you
if let badgeNumber: Int = userInfo["badge"] as? Int {
    application.applicationIconBadgeNumber = badgeNumber
}

另外，問題似乎是您在加載View Controller時沒有更新按鈕的標志。 您只有在收到新通知並且View Controller可見時才更新它們。 簡而言之，在您的View Controller上嘗試以下操作：

override func viewDidAppear(animated: Bool) {
    super.viewDidAppear(animated)

    followLabelNumber = NSUserDefaults.standardUserDefaults().integerForKey("followNumberKey")
    commentLabelNumber = NSUserDefaults.standardUserDefaults().integerForKey("commentNumberKey")

    //BEGIN SUGGESTED CODE
    profileNotificationLabel.hidden = followLabelNumber > 0
    profileNotificationLabel.text = String(followLabelNumber!)

    commentsNotificationLabel.hidden = commentLabelNumber > 0
    commentsNotificationLabel.text = String(commentLabelNumber!)
    //END SUGGESTED CODE

    NSNotificationCenter.defaultCenter().removeObserver(self, name: "followNotification", object: nil)
    NSNotificationCenter.defaultCenter().addObserver(self, selector:"followNotificationReceived:", name:"followNotification", object: nil)
    NSNotificationCenter.defaultCenter().removeObserver(self, name: "commentNotification", object: nil)
    NSNotificationCenter.defaultCenter().addObserver(self, selector:"commentNotificationReceived:", name:"commentNotification", object: nil)


    self.navigationController?.navigationBarHidden = true
}

最后但並非最不重要的一點是，每當收到遠程通知時，就將其傳遞到AppDelegate中的 func handleRemoteNotifications(application: UIApplication, userInfo: NSDictionary) 。 反過來，這會將NSNotification到正在監聽的對象。 但是，可能存在或可能沒有ViewController，因為在應用程序處於后台時可能已將其釋放。 因此，當您收到遠程通知時，這些代碼行將永遠不會被調用：

NSUserDefaults.standardUserDefaults().setInteger(followLabelNumber!, forKey: "followNumberKey")
NSUserDefaults.standardUserDefaults().synchronize()

嘗試將以上各行移至AppDelegate的func handleRemoteNotifications(application: UIApplication, userInfo: NSDictionary)方法。