PTPDFViewCtrlPageDidChangeNotification
extern const NSNotificationName _Nonnull PTPDFViewCtrlPageDidChangeNotification
Posted when the PTPDFViewCtrl‘s page number has changed.
The notification object is the pdfViewCtrl that posted the notification. The userInfo dictionary
contains entries for the PTPDFViewCtrlPreviousPageNumberUserInfoKey and
PTPDFViewCtrlCurrentPageNumberUserInfoKey keys.
PTPDFViewCtrlPageDidChangeNotification Constant Reference