Subclass an existing Swift Singleton

Question

I am adding functionality to an AWS class that creates a singleton (AWSIdentityManager) and the code for that class is in flux (AWS are improving it). I would like to make my added functionality more distinct from the AWS code so that I don't have to keep changing it when they upgrade.

Can I achieve this by subclassing or extension?

My goal is not to create another copy of the existing singleton, I just want to add methods (and hopefully properties) to it, without making too many changes in the released code.

I should note the following: The original class is written in Obj-C. I would like to have properties if possible.

Answer 1

To extend

extension AWSclass {
func functionA () { ...}

}

usage

AWSclass.shared.functionA()