Receiving Notifications
When your device receives a notification, either local or remote, the device will check whether your app is currently active and in the foreground. If not, the parameters included guide the device to play a sound, display an alert, or update the badge on your app icon. If an alert is displayed, the user will have the opportunity to dismiss the alert or to follow the alert into the app.
If the user chooses to go into the app, then either the app delegate’s appDidFinishLaunchingWithOptions: method is called if the app is in a terminated state and is launching, or a delegate method will be called when the app is brought to the foreground. The same delegate method will be called if the app happens to be in the foreground ...
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