ios - 从应用程序的launchOptions中获取值(…launchOptions:[NSObject:AnyObject]？)

我正在尝试从UIApplicationDelegate获取launchOptions的值

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

如果launchOptions是NSDictionary，我可能可以通过以下方式检索值

launchOptions[launchOptions.UIApplicationLaunchOptionsRemoteNotificationKey]

但是对象是[NSObject: AnyObject]。如何获取此类型的值？

最佳答案

您的变体不安全，最好使用if let语句：

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
}

关于ios - 从应用程序的launchOptions中获取值(…launchOptions:[NSObject:AnyObject]？)，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/34127052/