Question

当我的应用程序在远程通知进入时打开时，我真的需要帮助调用视图控制器方法，尤其是在使用TabBar导航时。当我在通知到达时打开我的应用程序时，它会调用 didReceiveRemoteNotification 因为我启用了“content-available = 1”。但问题是我不知道如何访问我的HomeViewController方法refresh()因为我使用TabBar Navigation.I需要调用{{在HomeViewController内部的1}} refresh()方法，因为它确实需要从核心刷新数据，并且到达的通知将保存在coredata中。

每次收到通知时，我都会将它们保存在领域数据库中，并在didReceiveRemoteNotification显示用户

HomeViewController

这是来自func application(application: UIApplication, didReceiveRemoteNotification userInfo: [NSObject : AnyObject], fetchCompletionHandler handler: (UIBackgroundFetchResult) -> Void) { if let aps = userInfo["aps"] as? NSDictionary{ if let alert = aps["alert"] as? NSDictionary{ if let mbody = alert["body"] as? String{ print("Message Body : \(body)") body = mbody } if let mtitle = alert["title"] as? String{ print("Message Title : \(title)") title = mtitle } } } let newNotification = NotificationList() newNotification.title = title newNotification.body = body //Realm insert query oneSignalHelper.insertOneSignalNotification(newNotification) print("Remote Receive") //This condition isn't working if let viewController = self.window?.rootViewController as? HomeViewController { print("Remote Receive Read") //This method is HomeViewController method which I gonna use for refresh when I tapped notification.It read that are save in realm database and show results. viewController.readNotificationsAndUpdateUI() } handler(UIBackgroundFetchResult.NewData) }

的readNotificationsAndUpdateUI()

HomeViewController

Answer 1

我建议您使用NSNotificationCenter，只需在didReceiveRemoteNotification内发布通知，如下所示：

NSNotificationCenter.defaultCenter().postNotificationName("refreshNotification", object: nil)

在viewDidLoad()的HomeViewController中，您应该像这样订阅通知中心：

NSNotificationCenter.defaultCenter().addObserver( self, selector: "refresh", name: "refreshNotification", object: nil)

Answer 2

不确定是否有帮助，但我根据先前的答案以这种方式解决了

加载情节提要

let storyBoard: UIStoryboard = UIStoryboard(name: "Main", bundle:nil)

加载ViewController（检查故事板中是否有此ViewController的标识符！）让bestellvorschlag = storyBoard.instantiateViewController（identifier：“ Bestellvorschlag”）为！ Bestellvorschlag

在ViewController上加载函数

bestellvorschlag.loaddata() //Loads CoreData into Array of artikels

也许用结果数修改Tabbar徽章

let tabbarcontroller = self.window?.rootViewController as! UITabBarController
    if bestellvorschlag.artikels.count > 0
    {
        if let tabItems = tabbarcontroller.tabBar.items {
            // Third Tab!
            let tabItem = tabItems[2]
            tabItem.badgeValue = bestellvorschlag.artikels.count.description
        }
    }

appDelegate中的完整功能

func applicationDidBecomeActive(_ application: UIApplication) {
 let storyBoard: UIStoryboard = UIStoryboard(name: "Main", bundle:nil)
        let bestellvorschlag = storyBoard.instantiateViewController(identifier: "Bestellvorschlag") as! Bestellvorschlag
        bestellvorschlag.loaddata()

        let tabbarcontroller = self.window?.rootViewController as! UITabBarController
        if bestellvorschlag.artikels.count > 0
        {
            if let tabItems = tabbarcontroller.tabBar.items {
                // Third Tab!
                let tabItem = tabItems[2]
                tabItem.badgeValue = bestellvorschlag.artikels.count.description
            }
        }
    }

如果我使用TabBar Navigation，如何从AppDelegate调用viewcontroller方法

2 个答案: