CODEWITHSUNDEEP
iosswiftcore-bluetooth
Michel
Michel

Reputation: 11755

A weird message in CoreBluetooth / CBCentralManagerDelegate

In my implementation of the CBCentralManagerDelegate protocol, I have the following function.

func centralManager(_ central: CBCentralManager,
                    didDisconnectPeripheral peripheral: CBPeripheral,
                    error: Error?) {
    print(#function)
    if error != nil {
        print("Error in \(#function) :\n\(error!)")
        return
    }
    ......
    // More useful code irrelevant to the question.
}

When the above function is called I can see the message below in the Xcode debugging console.

centralManager(_:didDisconnectPeripheral:error:)
Error in centralManager(_:didDisconnectPeripheral:error:) :
Error Domain=CBErrorDomain Code=7 "The specified device has disconnected from us." 
UserInfo={NSLocalizedDescription=The specified device has disconnected from us.}

Here is my question: I must be missing something (because too simple or too subtle), but why does is show an error because "The specified device has disconnected from us."

In the centralManager:didDisconnectPeripheral function, what else could I expect other than the device being disconnected?

I hope some enlighted expert can bring some light an explain why this is so.

Upvotes: 0

Views: 528

Answers (1)

user614273
user614273

Reputation: 74

As per the Apple documentation: If the disconnection was not initiated by cancelPeripheralConnection(_:), the cause is detailed in error.

I.e if You disconnect then you get no error but if They disconnect you see that through the error. Source: https://developer.apple.com/documentation/corebluetooth/cbcentralmanagerdelegate/1518791-centralmanager

Upvotes: 1

Related Questions