ios - swift 代码 : how to launch a specific view controller after receiving a remote push notification

Question

在 Swift 中，我的 ma​​in.storyboard 有 2 个 View Controller (mainVC、secondVC)，它们都嵌入在它们的导航 Controller 中。收到远程推送通知时，我如何更改 AppDelegate 中的代码以使 secondVC View Controller 每次都启动。我目前有代码在 didReceiveRemoteNotification 中发布通知，并且在 secondVC 中有代码来添加观察者

在AppDelegate.swift中，我的代码如下:

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool
{
    var type = UIUserNotificationType.Badge | UIUserNotificationType.Alert | UIUserNotificationType.Sound
    var setting = UIUserNotificationSettings(forTypes: type, categories: nil)
    UIApplication.sharedApplication().registerUserNotificationSettings(setting)
    UIApplication.sharedApplication().registerForRemoteNotifications()
    return true
}
func application(application: UIApplication, didReceiveRemoteNotification userInfo: [NSObject : AnyObject]) {
    NSNotificationCenter.defaultCenter().postNotificationName("MyNotificationType", object: nil, userInfo: userInfo)

}

在secondVC中，我有如下代码:

override func viewWillAppear(animated: Bool) {
    println("viewWillAppear()")
    NSNotificationCenter.defaultCenter().addObserver(self, selector: "AuthenticateWithTouchID:", name: "MyNotificationType", object: nil)
}
override func viewWillDisappear(animated: Bool) {
    println("viewWillDISAPPER")
    NSNotificationCenter.defaultCenter().removeObserver(self, name: "MyNotificationType", object: nil)
}

Answer 1

这应该有效。您的 UINavigationController 的 viewControllers 属性是嵌入在导航 Controller 中的所有 View Controller 的数组。所以如果你想要你的第二个 vc，你可以像典型的数组一样访问它，所以 viewControllers[1]

func application(application: UIApplication, didReceiveRemoteNotification userInfo: [NSObject : AnyObject]) {

    var navController:UINavigationController = self.window?.rootViewController as! UINavigationController

    if navController.viewControllers != nil {
        var vc:CustomViewController = navController.viewControllers[1] as! CustomViewController
        navController.presentViewController(vc, animated: false, completion: nil)
    }
}