How to pair the IP camera using QR code mode?

Pls refer to the guide: Android：https://gitbook.tuyacn.com/tuyasmart_home_android_sdk_doc/en/resource/Activator_device.html

iOS：https://gitbook.tuyacn.com/tuyasmart_home_ios_sdk_doc/en/resource/Activator.html#device-configuration