NS_ENUM
Acts with the most appropriate mode that is available.
typedef NS_ENUM(NSUInteger, FBSDKShareDialogMode) { FBSDKShareDialogModeAutomatic = 0, FBSDKShareDialogModeNative, FBSDKShareDialogModeShareSheet, FBSDKShareDialogModeBrowser, FBSDKShareDialogModeWeb, FBSDKShareDialogModeFeedBrowser, FBSDKShareDialogModeFeedWeb, };
The automatic mode will progressively check the availability of different modes and open the most appropriate mode for the dialog that is available.
FBSDKShareDialogMode.h