Bind error

[rmvz3]

Hi. Thank you for your work. I've been looking for a library just like yours. It's great for implementing MVVM without having to add RxSwift and so.

I'm getting an error when I try to use the bind function. For instance, if I write:

bind(wsSuccess, to: model.wsFBSuccess) //both properties are Observable(false)

I get a Xcode error saying "Missing argument for parameter #3 in call". I don't know if you have changed the function signature from the one appearing in the readme but autocomplete is only offering me: bind(Int32, UnsafePointer!, socklen_t) which seems unrelated to your library.

What am I doing wrong?

[smeis]

Hi @rmvz3,

It looks like your code should compile just fine, the function signature hasn't changed. Did you use Carthage or Cocoapods to add Hanson to your project? And do you have an import Hanson statement at the top of your file?

[rmvz3]

I'm using Cocoapods. Hanson is imported and Observable properties works fine but the bind function is not accepted. It's weird but I've just realized that it works in other places. Take a look at this screenshot. It tries to bind the same properties from different classes.

http://imgur.com/a/72qJe

[smeis]

That's weird indeed! Have you tried rebuilding the project after cleaning, removing the derived data and reinstalling the pod?

If that doesn't work, can you discern any regularities in this error popping up in your project? The FacebookManagerDelegate is a protocol right? Could you check if binding works in other classes that are not a subclass?

[rmvz3]

I've already tried the cleaning with no success. I think I found the reason. It seems that the problem arises just in classes that are not inherited from UIKit or Foundation. I don't know if this is an intentional behavior but at least there's an easy workaround

[smeis]

Ah yes, that's true. Any class that is a subclass of NSObject conforms to Observer through this extension. The Observer protocol has been extended with the bind function, so on any subclass of NSObject you can simply call bind and it works out of the box. Sadly this is not the case for classes that do not inherit from NSObject.

You could use Hanson on your LoginFacebookVM class by making it conform to the Observer protocol. However, I've noticed a mistake on our end. We didn't make the init method of ObservationManager public and you need to be able to create an observation manager to conform to the Observer protocol. I'll create a PR to fix this. Apologies!

[rmvz3]

Thank you, Eric. I'm glad this has served to help to improve the code :)

[smeis]

You're more than welcome @rmvz3! Thank you for contributing!

I've published the updated podspec.