Skip to content

How to use in UIImagePickerController #51

@StevenSorial

Description

@StevenSorial

Trying to add a publisher to UIImagePickerController using a DelegateProxy

My code:

extension UIImagePickerController {
  var didFinishPickingMedia: AnyPublisher<[UIImagePickerController.InfoKey: Any], Never> {
    let didPickSelector =
      #selector(UIImagePickerControllerDelegate.imagePickerController(_:didFinishPickingMediaWithInfo:))

    return delegateProxy
      .interceptSelectorPublisher(didPickSelector)
      .map { $0[1] as! [UIImagePickerController.InfoKey: Any] }
      .eraseToAnyPublisher()
  }

  var didCancel: AnyPublisher<Void, Never> {
    let didCancelSelector = #selector(UIImagePickerControllerDelegate.imagePickerControllerDidCancel(_:))
    return delegateProxy
      .interceptSelectorPublisher(didCancelSelector)
      .map { _ in () }
      .eraseToAnyPublisher()
  }

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

private class UIImagePickerControllerDelegateProxy: DelegateProxy,
                                                    UIImagePickerControllerDelegate,
                                                    UINavigationControllerDelegate,
                                                    DelegateProxyType {
  func setDelegate(to object: UIImagePickerController) {
    object.delegate = self
  }
}

Works well on devices but crashes when presenting the controller on a simulator with 'NSInvalidArgumentException', reason: '*** -[__NSArrayM insertObject:atIndex:]: object cannot be nil'.

Metadata

Metadata

Assignees

No one assigned

    Labels

    No labels
    No labels

    Type

    No type

    Projects

    No projects

    Milestone

    No milestone

    Relationships

    None yet

    Development

    No branches or pull requests

    Issue actions