Global Variable


Posted when the value returned by the canSendText class method has changed.


NSString *const MFMessageComposeViewControllerTextMessageAvailabilityDidChangeNotification;


Upon receiving this notification, query its userInfo dictionary with the MFMessageComposeViewControllerTextMessageAvailabilityKey key. If the availability of text message sending has changed, your app should invalidate caches and update its user interface as appropriate.

See Also

Handling Notifications


The value of this key is a number object that contains a Boolean value.

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