Can't create my own delegate-based publishers

[kevinrenskers]

I'm trying to add some publishers to UISearchBarDelegate like this:

extension UISearchBar {
  var searchBarSearchButtonClicked: AnyPublisher<UISearchBar, Never> {
    let selector = #selector(UISearchBarDelegate.searchBarSearchButtonClicked(_:))

    return delegateProxy
      .interceptSelectorPublisher(selector)
      .map { $0[1] as! UISearchBar }
      .eraseToAnyPublisher()
  }

  private var delegateProxy: UISearchBarDelegateProxy {
      .createDelegateProxy(for: self)
  }
}

private class UISearchBarDelegateProxy: DelegateProxy, UISearchBarDelegate, DelegateProxyType {
  func setDelegate(to object: UISearchBar) {
    object.delegate = self
  }
}

Sadly I am getting two compiler errors:

'interceptSelectorPublisher' is inaccessible due to 'internal' protection level

and

Cannot inherit from non-open class 'DelegateProxy' outside of its defining module

[freak4pc]

Fair point, we'll have to make DelegateProxy open and interceptSelectorPublisher public. If I give you a branch will you be able to test it?

[kevinrenskers]

No problem

[freak4pc]

By the way it might be nicer to push such a proxy as a PR so we could offer it to everyone ;) Outside the point, but still relevant

[freak4pc]

@kevinrenskers please try expose-delegateproxy

[kevinrenskers]

That was definitely my plan, once I had it done in my own project :)

[kevinrenskers]

Alrighty, that works.