textMessageAvailabilityDidChange
Notification posted when text message availability changes.
Declaration
static var textMessageAvailabilityDidChange: NotificationCenter.BaseMessageIdentifier<MFMessageComposeViewController.TextMessageAvailabilityDidChangeMessage> { get }Discussion
This notification is posted when the device’s ability to send text messages changes (e.g., SIM card inserted/removed, airplane mode toggled, iMessage account status changed).