problem description

I have two ViewController, one ViewA to search and display the Bluetooth list, and one ViewB to control the operation of Bluetooth devices. Now I inherit CBCentralManagerDelegate , CBPeripheralDelegate on ViewA and search for the desired device in didDiscover , and then successfully connect the device in didConnect .

at this point I need to enter ViewB and operate Bluetooth device or monitor Bluetooth data in ViewB, but I can"t get peripheral which is connected successfully in ViewA. So is there any way that a device that I can successfully connect to in ViewA can be used directly in ViewB?

what methods have you tried

I found on the Internet that someone said to use singleton mode, create a singleton of BLEManager , and then use this singleton directly in ViewA and ViewB, but for example, didDiscover is an asynchronous method. How can I tell this singleton in ViewA that discover starts now?