Conditional requests with InstantSearch iOS
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By default, InstantSearch sends an initial request to Algolia’s servers with an empty query. This connection helps speed up later requests.
However, sometimes you don’t want to perform more network calls than are necessary. For example, you may want to limit the number of search requests and reduce your overall Algolia usage. This guide helps you build a UI that prevents this initial request.
Set Searcher shouldTriggerSearchForQuery
property
All the Searcher
implementations such as HitsSearcher
and FacetSearcher
provide the shouldTriggerSearchForQuery
closure which defines the boolean condition for triggering a search operation.
By default has a nil
value so the search will be triggered on each search()
function call.
The closure blocking searches for empty queries should look as follows:
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let searcher = SingleIndexSearcher(appID: "YourApplicationID",
apiKey: "YourSearchOnlyAPIKey",
indexName: "search_index_name")
searcher.shouldTriggerSearchForQuery = {
return $0.query.query != ""
}