SearchBoxConnector(
    searcher,
    interactor,
    searchTriggeringMode,
    controller
)

​
Parameters

​
searcher
Searcher
required
The Searcher that handles your searches.
​
interactor
SearchBoxInteractor
default:".init()"
The logic applied to SearchBox.
​
searchTriggeringMode
SearchTriggeringMode
default:".searchAsYouType"
Defines the event triggering a new search. It can either be .searchAsYouType or .searchOnSubmit.
​
controller
SearchBoxController
default:"nil"
Controller interfacing with a concrete search box view.

​
Low-level API

If you want to fully control the SearchBox components and connect them manually, you can use the following components:
  • Searcher: the Searcher that handles your searches.
  • SearchBoxInteractor: the logic that handles new search inputs.
  • SearchBoxController: the controller interfacing with a concrete input view.
let searcher = HitsSearcher(appID: "YourApplicationID",
                            apiKey: "YourSearchOnlyAPIKey",
                            indexName: "YourIndexName")
let searchBoxInteractor: SearchBoxInteractor = .init()
let searchBarController: SearchBarController = .init(searchBar: UISearchBar())
// if your project targets iOS 13+, the usage of TextFieldController(searchBar: UISearchBar()) is recommended

searchBoxInteractor.connectSearcher(searcher, searchTriggeringMode: .searchAsYouType)
searchBoxInteractor.connectController(searchBarController)

​
Customizing your view

The default controllers, TextFieldController and SearchBarController, work well with UIKit. If you want to use another component, such as a third-party input view, or introduce custom behaviors to UIKit components, you can create a controller that conforms to the SearchBoxController protocol.

​
Protocol

var onQueryChanged: ((String?) -> Void)?: Closure you should call when the query is modified. var onQuerySubmitted: ((String?) -> Void)? Closure you should call when the query is submitted. func setQuery(_ query: String?) Function called when the query is modified from the outside.

​
Implementation example

public class TextFieldController: NSObject, SearchBoxController {

public var onQueryChanged: ((String?) -> Void)?
public var onQuerySubmitted: ((String?) -> Void)?

let textField: UITextField

public init (textField: UITextField) {
    self.textField = textField
    super.init()
    setupTextField()
}

public func setQuery(_ query: String?) {
    textField.text = query
}

@objc func textFieldTextChanged(textField: UITextField) {
    guard let searchText = textField.text else { return }
    onQueryChanged?(searchText)
}

private func setupTextField() {
    textField.returnKeyType = .search
    textField.addTarget(self, action: #selector(textFieldTextChanged), for: .editingChanged)
    textField.delegate = self
}

}

extension TextFieldController: UITextFieldDelegate {

public func textFieldShouldReturn(_ textField: UITextField) -> Bool {
    onQuerySubmitted?(textField.text)
    return true
}

}

​
SwiftUI

InstantSearch provides the SearchBar SwiftUI view, which you can embed in your views. It uses SearchBoxObservableController as a data model, which implements the SearchBoxController protocol for SwiftUI. SearchBoxObservableController must be connected to the SearchBoxConnector or SearchBoxInteractor like any other SearchBoxController implementation. 
struct ContentView: View {

@ObservedObject var searchBoxObservable: SearchBoxObservableController = .init()
@State var isEditing = false

var body: some View {
    SearchBar(text: $searchBoxObservable.query,
        isEditing: $isEditing,
        onSubmit: searchBoxObservable.submit)
}

}
If you prefer to create a custom SwiftUI view that handles the query input, you can directly use the SearchBoxObservableController as a data model. It provides the query property along with the submit function to streamline the design process of your custom SwiftUI view.