BlixLT

I can add my observations regarding this issue. I am trying to adjust my app’s transformable attributes to conform upcoming requirements with secure archiving/unarchiving. I made valuetransformer’s subclass and noticed...

I am not completely convinced, that it is the correct approach (ignoring check of ValueTransformer's class/subclass). From the [Apple documentation ](https://developer.apple.com/documentation/coredata/nsattributedescription/1498305-valuetransformername?language=objc) : The transformer must output an NSData object from...

Btw, NSSecureUnarchiveFromDataTransformer is available from iOS 12.0+, macOS 10.14+, so it is not possible to make a subclass of it for the earlier OS versions. But I guess you can...

@mentrena there are some problems with your tests. Firstly, unlike real apps it uses in memory store. As far as I noticed, it does not call valueTransformer's methods during context's...

Sure, sounds good