Is there an NSNotification we can observe for when the device is on/off the phone?
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Is there an NSNotification we can observe for when the device is on/off the phone?
The
NotificationCenterdoesn’t send out any notifications abou this, but take a look at theCTCallCenterclass introduced in iOS 4. It has acallEventHandlerproperty that you can assign a block of code to, and gets called with call state info.There is a limitation in that the handler only gets called when your app is in the foreground (or being taken out of the foreground when a call comes in), but it tells you if the user is dialing (
CTCallStateDialing), receiving a call (CTCallStateIncoming), answering/connecting (CTCallStateConnecting) or hanging up on a call (CTCallStateDisconnected).