asynchronous – iOS Widget Configuration: Methods to present a loading spinner whereas fetching information with an IntentHandler?

My app has a widget that permits for personalisation. When the person chooses to edit the widget, it flips to disclose a customization pane. For instance, to illustrate I’ve a climate widget and the one customization choice is town for which to point out the present climate situation.

When the person faucets the present metropolis to decide on a special one, I have to carry out a community request to fetch the obtainable cities which may take a while beneath troublesome community circumstances. In that state of affairs, my widget configuration pane seems to be damaged as a result of nothing occurs after I faucet on the present metropolis. Solely after a number of seconds (when the information has been fetched), the modal display screen seems with the listing of obtainable cities.

However I wish to give the person some visible suggestions that one thing is occurring whereas the cities are loading. How can I obtain that?

Be aware

I discovered this different query on Stackoverflow with a GIF that reveals a loading spinner (exercise indicator / ProgressView) contained in the widget configuration pane. How do I make this factor seem?

Pattern Implementation

That is my pattern implementation in my IntentHandler to simulate a community request earlier than returning. (Tried the identical factor utilizing a completion handler as an alternative of the async perform.) It does not present a loading spinner.

func provideCategoryOptionsCollection(for intent: CityIntent) async throws -> INObjectCollection<Class> {
    // Simulate async community request
    attempt await Process.sleep(nanoseconds: UInt64(5 * Double(NSEC_PER_SEC)))
    let citiesSection: INObjectSection<Metropolis> = INObjectSection(
        title: "Cities", 
        objects: [.singapore, .sydney, .honolulu]
    )
    return INObjectCollection(sections: [citiesSection])
}