问题
I would like to receive a notification each time Siri appears or disappears from the screen.
It may appear when the user puts the iPhone near his ear.
Is it possible?
回答1:
I ran a test and the following notifications are sent when Siri appears:
_UIApplicationWillAddDeactivationReasonNotification
UIApplicationWillResignActiveNotification
... and when Siri is dismissed:
_UIApplicationDidRemoveDeactivationReasonNotification
UIApplicationDidBecomeActiveNotification
So, no... since there isn't a public Siri API, and UIApplication doesn't send any Siri specific notifications, it looks like we're out of luck for now.
回答2:
The only notification you'd get is a applicationDidEnterBackground (or something like that).
I don't think there are any Siri APIs at the moment so you would be looking at the OS as a whole.
来源：https://stackoverflow.com/questions/13620475/ios-is-there-any-notification-that-siri-has-appeared