我如何调用ViewController、appDelegate或其他地方的这种方法:

func contactDelete(notification : NSNotification){}

我必须在 appDelegate 里面调用它

`didFinishLaunchingWithOptions` here or inside other classes:



      func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
            // Override point for customization after application launch.

            let tintColor = UIColor(red: 252/255, green: 72/255, blue: 49/255, alpha: 1)
            window!.tintColor = tintColor

            if let aLaunchOptions = launchOptions { // Checking if there are any launch options.
                // Check if there are any local notification objects.
                if let notification = (aLaunchOptions as NSDictionary).objectForKey("UIApplicationLaunchOptionsLocalNotificationKey") as? UILocalNotification {
                    // Handle the notification action on opening. Like updating a table or showing an alert.
                    UIAlertView(title: notification.alertTitle, message: notification.alertBody, delegate: nil, cancelButtonTitle: "OK").show()
  let root : UIViewController = self.window!.rootViewController! as UIViewController
                let alertview = JSSAlertView().show(root, title: "Oops!", text: "Unable to add the new Contact, check contact permission from Settings.", buttonText: "Check it", cancelButtonText: "Nope", color: UIColor.init(red: 0.216, green:0.043, blue:0.129, alpha: 1))
                alertview.addAction(contactDelete)
                alertview.setTextTheme(.Light)


                }
            }

它需要一些额外的参数，但我不知道是什么参数。我什至不能在 viewDidLoad 方法中调用它。我试图像这样触发它，但它不起作用:

NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(ViewController.contactDelete(_:)), name:DELETECONTACT, object: nil)

最佳答案

在您的 Appdelegate 代码中，您根据通知到达或简单启动分配 RootviewController，使用:

if let notification = (aLaunchOptions as NSDictionary).objectForKey("UIApplicationLaunchOptionsLocalNotificationKey") as? UILocalNotification {

但是你将 NotificationViewController 设置为 rootViewController 并且你在 MainViewController 上 addObserver 所以当你收到通知并且你的 rootView 设置为 NotificationViewController 你不会创建 NSNotificationCenter 并且你无法发布它。所以我建议创建如下代码:

你的 appdelegate didFinishLaunchingWithOptions 方法:

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
        // Override point for customization after application launch.
        self.window = UIWindow(frame: UIScreen.mainScreen().bounds)
        let tintColor = UIColor(red: 252/255, green: 72/255, blue: 49/255, alpha: 1)
        window!.tintColor = tintColor

        application.registerForRemoteNotifications()
        application.registerUserNotificationSettings(UIUserNotificationSettings(forTypes: .Alert , categories: nil))


        let mainStoryboardIpad : UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
        let initialViewControlleripad : UIViewController = mainStoryboardIpad.instantiateViewControllerWithIdentifier("first") as UIViewController


        let navController: UINavigationController = UINavigationController(rootViewController: initialViewControlleripad)
        navController.navigationBarHidden = true

        self.window?.rootViewController = navController
        self.window?.makeKeyAndVisible()


        let notification = launchOptions?[UIApplicationLaunchOptionsLocalNotificationKey] as! UILocalNotification!
        if (notification != nil) {


            runAfterDelay(2.0) {  // add 2 second delay of call method open notificationViewController from mainViewController
                self.FireNewViewControlelr(notification.userInfo!)
            }

        }
        return true
    }

下面是两种调用NotificationViewController的方法:

func FireNewViewControlelr(Value: [NSObject : AnyObject]) {

    print("userInf \(Value)")

    let navigationController: UINavigationController = (self.window!.rootViewController as! UINavigationController)
    let mainStoryboardIpad : UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
    let initialViewControlleripad : UIViewController = mainStoryboardIpad.instantiateViewControllerWithIdentifier("Main") as! NotificationViewController
    NSNotificationCenter.defaultCenter().postNotificationName(DELETECONTACT, object: Value)
    navigationController.pushViewController(initialViewControlleripad, animated: true)

}


func runAfterDelay(delay: NSTimeInterval, block: dispatch_block_t) {
    let time = dispatch_time(DISPATCH_TIME_NOW, Int64(delay * Double(NSEC_PER_SEC)))
    dispatch_after(time, dispatch_get_main_queue(), block)
}

如果您的应用程序处于后台模式并且您从轻触的通知横幅打开应用程序 didReceiveLocalNotification 如下所示:

func application(application: UIApplication, didReceiveLocalNotification notification: UILocalNotification) {

        print("notification - tapped")

        if application.applicationState == UIApplicationState.Active {
            print("App already open")

        } else {
            print("App opened from Notification")


            runAfterDelay(2.0) {
                self.FireNewViewControlelr(notification.userInfo!)
            }

        }

    }

更改以下方法中的代码:

 func FireNewViewControlelr(Value: [NSObject : AnyObject]) {

        print("userInf \(Value)")

        let navigationController: UINavigationController = (self.window!.rootViewController as! UINavigationController)
        let mainStoryboardIpad : UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
        let initialViewControlleripad : NotificationViewController = mainStoryboardIpad.instantiateViewControllerWithIdentifier("Main") as! NotificationViewController
        initialViewControlleripad.notificationInfo = Value
        navigationController.pushViewController(initialViewControlleripad, animated: true)

    }

在 NotificationViewController 中

  var notificationInfo = [NSObject : AnyObject]()

    override func viewDidLoad() {
        super.viewDidLoad()


        print("data is \(notificationInfo)")


        // Do any additional setup after loading the view.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    @IBAction func action(sender: AnyObject) {

         NSNotificationCenter.defaultCenter().postNotificationName(DELETECONTACT, object: notificationInfo)
       self.navigationController?.popToRootViewControllerAnimated(true)
    }

关于swift - 如何从 ViewController 或其他地方调用或触发 AppDelegate 中的通知功能？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/37859388/