CODEWITHSUNDEEP
swiftbluetooth-lowenergymirror
Paperino
Paperino

Reputation: 1019

Printing the CBCharacteristic._handle value in Swift

I have some wireshark logs which show characteristic read writes by handle value. I wanted to dump a map of each characteristic handle value into it's GUID representation.

I've tried using Mirror(reflecting: characteristic) but the returned Mirror instance's children collection is empty (which is also weird since the characteristic has a bunch of public/private properties).

Unless I am misunderstanding what reflection is in Swift, I don't see what I am doing wrong. Suggestions? I really don't care about using reflection vs a different method (although one of my goals is to understand that part too).

Any hints?

Upvotes: 1

Views: 93

Answers (1)

adrian
adrian

Reputation: 1457

It's not exactly clean, but you can invoke the private Objective-C accessor using a selector:

let res = characteristic.perform(Selector(("handle")));
let handle = res!.takeUnretainedValue() as! NSNumber;
print(handle);

Upvotes: 1

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