DUXLeadingBarViewController external accessory widgets not accessible

[adolfo]

It is not possible to access the external accessories (DUXSpeakerWidget, DUXSpotlightWidget, etc.) from the DUXLeadingBarViewController. When attempting to fetch these widgets using the following method, the result is always nil:

let leadingBar = DUXLeadingBarViewController()
let speakerWidget = leadingBar.widget(with: DUXSpeakerWidget.self)
// speakerWidget == nil

The expectation is that the widget(with: AnyClass) would return the nested widget.

The only workaround I've found is to iterate through the child views of the non-public DUXExternalAccessoryWidgetBase widget:

if let externalAccessoryClass = NSClassFromString("DUXExternalAccessoryWidgetBase") {
    if let externalAccessory = leadingBar.widget(with: externalAccessoryClass) {
        for subview in externalAccessory.subviews {
            if let speakerWidget = subview as? DUXSpeakerWidget {
                speakerWidget.action = { /* do something useful */ }
            }
            if let spotlightWidget = subview as? DUXSpotlightWidget {
                spotlightWidget.action = { /* do something useful */ }
            }
        }
    }
}

Perhaps this is a bug or there is a better way to acquire a reference to the accessory widgets.

[dji-dev]

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