I am able to successfully create a bindings framework and build & run a Xamarin app that references code in the Swift framework. (I did this using several of the excellent references for binding to a Swift framework: building the fat binary, using objective sharpie, etc.) Originally, the app crashed at launch. That turned out to be that one of the Swift libraries I needed was missing. Now the app launches and displays the UI I've built in the storyboard. But when I attempt to execute a method in the framework fromviewDidLoad in ViewController.cs nothing happens! I have confirmed in the debugger that it is getting to the call site inside of viewDidLoad where it calls a method from my framework.
I noticed that when I run the app in the iPhone Simulator, I see a bunch of messages like this in the macOS console from a process named amfid:
...CLPExample.app/Frameworks/libswiftos.dylib signature not valid: -67050
There is such a message for every one of the Swift-related libraries included in the app. There is also such a message for my bindings framework.
When I run the app on my iPhone, it behaves in a similar manner (nothing happens when I call a method from the framework). However, I also do not see the "signature not valid" messages.
I'm completely stumped at this point. Does anyone have any thoughts on what might be going on here?