How do I filter data from database arrays using Search bar

问题

Im using the search bar to filter data from the database and will populate the tableView. Im getting an error on the isSearching part.

Value of type 'DataSnapshot' has no member 'contains'

Heres the code.

func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
    if searchBar.text == nil || searchBar.text == "" {
        isSearching = false
        view.endEditing(true)
        tableView.reloadData()
    } else {
        isSearching = true
        filteredColorRequests = colors.filter{$0.contains(searchBar.text!)}
        tableView.reloadData()
    }
}

How

回答1:

You certainly want to search for a specific String property for example a name.

And rather than getting the search string form the bar use the searchText parameter which is already non-optional.

func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
    if searchText.isEmpty {
        isSearching = false
        view.endEditing(true)
    } else {
        isSearching = true
        filteredColorRequests = colors.filter{(($0.value as! [String:Any])["name"] as! String).contains(searchText)}
    }
    tableView.reloadData()
}

来源：https://stackoverflow.com/questions/57800914/how-do-i-filter-data-from-database-arrays-using-search-bar