杀死切换器中的应用程序，然后从本地通知启动它，didFinishLaunchingWithOptions中的launchOptions为nil

App get a local notification when it's in background, and then I killed it in switcher. When I tap the notification, the app relaunched with the launchOptions values nil,so I can't get any information about the local notification,what should I do? And more, if I get more than one local notification, how do I distinguish which notification I tapped? Thanks for any suggestion!App get a local notification when it's in backg