從應用程序的launchOptions獲取值（…launchOptions：[NSObject：AnyObject]？）

Question

我正在嘗試從UIApplicationDelegate獲取launchOptions的值

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

如果launchOptions是NSDictionary，我可能可以通過以下方式檢索值

launchOptions[launchOptions.UIApplicationLaunchOptionsRemoteNotificationKey]

但是對象是[NSObject: AnyObject] 。 如何獲取此類型的值？

Answer 1

您的變體不安全，請使用if let語句更好地使用：

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
    if let options = launchOptions as? [String: AnyObject],
           notifyPayload = options[UIApplicationLaunchOptionsRemoteNotificationKey] {
            // do smth with notifyPayload
    }
    return true
}

Answer 2

斯威夫特充滿嘗試和調整

這是我自己的答案。

  let notifPayload = launchOptions[UIApplicationLaunchOptionsRemoteNotificationKey as String!] as? NSDictionary