ios - Unable to get accessory list using showBluetoothAccessoryPickerWithNameFilter -

i developing ios application using external accessory framework communicate hardware device.

problem :

[[eaaccessorymanager sharedaccessorymanager]showbluetoothaccessorypickerwithnamefilter:nil                                                                              completion:nil]; 

above method return empty list. have seen lot links , questions didn't find solution.

supported external accessory protocols added info.plist

could 1 have idea it? appreciate.