如何在点击通知时处理Swift 3中的启动选项？获得语法问题

Question

我正在尝试处理启动选项并在点击我在swift 3中收到的远程通知时打开一个特定的视图控制器.我已经看到类似的问题,例如这里,但没有新的swift 3实现.我看到了一个类似的问题(和)在AppDelegate.swift中我在didFinishLaunchingWithOptions中有以下内容:

    var localNotif = (launchOptions[UIApplicationLaunchOptionsRemoteNotificationKey] as! String)
if localNotif {
    var itemName = (localNotif.userInfo!["aps"] as! String)
    print("Custom: \(itemName)")
}
else {
    print("//////////////////////////")
}

但是Xcode给了我这个错误:

Type '[NSObject: AnyObject]?' has no subscript members

我也试过这个:

   if let launchOptions = launchOptions {
        var notificationPayload: NSDictionary = launchOptions[UIApplicationLaunchOptionsRemoteNotificationKey] as NSDictionary!

    }

我收到此错误:

error: ambiguous reference to member 'subscript'

我有类似的错误,无论我以前使用类似的代码通过键从字典中获取值,我不得不替换代码,基本上安全地首先解开字典.但这似乎不适用于此.任何帮助,将不胜感激.谢谢.

Answer 1

Apple在Swift 3其中一个方面做了很多改变.

编辑:这也适用于Swift 4.

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
    //Launched from push notification
    let remoteNotif = launchOptions?[UIApplicationLaunchOptionsKey.remoteNotification] as? [String: Any]
    if remoteNotif != nil {
        let aps = remoteNotif!["aps"] as? [String:AnyObject]
        NSLog("\n Custom: \(String(describing: aps))")
    }
    else {
        NSLog("//////////////////////////Normal launch")
    }
}

有关LaunchOptionKeys阅读Apple的文档的更多信息.

Answer 2

所以事实证明整个方法签名已经改变,当我实现新的签名时,工作得很好.下面是代码.

新的didFinishLaunchingWithOptions方法:

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey : Any]? = nil) -> Bool {



//and then 
 if launchOptions?[UIApplicationLaunchOptionsKey.remoteNotification] != nil {


// Do what you want to happen when a remote notification is tapped.


}

}

希望这可以帮助.

Answer 3

斯威夫特4

// Check if launched from the remote notification and application is close
 if let remoteNotification = launchOptions?[.remoteNotification] as?  [AnyHashable : Any] {
            // Do what you want to happen when a remote notification is tapped.
            let aps = remoteNotification["aps" as String] as? [String:AnyObject]
            let apsString =  String(describing: aps)
            debugPrint("\n last incoming aps: \(apsString)")
    }