Create a Search Experience with MapsIndoors - Part 1

A newer version of the MapsIndoors SDK for iOS is available. The legacy version will not receive new features and will only get critical bugfix and security updates.

This is an example of creating a simple search experience using MapsIndoors. We will create a map with a search button that leads to another view controller that handles the search and selection. On selection of a location, we go back to the map and shows the selected location on the map.

We will start by creating a simple search controller that handles search and selection of MapsIndoors locations

Declare a protocol for our location selection with a didSelectLocation method

protocol MySearchControllerDelegate {
    func didSelectLocation(location:MPLocation)
}

Define MySearchController. In this tutorial our search controller is a UIViewController that implements the protocols UISearchBarDelegate, UITableViewDelegate and UITableViewDataSource

class MySearchController: UIViewController, UISearchBarDelegate, UITableViewDelegate, UITableViewDataSource {

Setup member variables for MySearchController:

• An instance of type MPLocationsProvider (the service)
• An instance of type MPLocationQuery
• An array of MPLocation to hold your list of results
• Your delegate object
• A search bar view
• A table view

let locationsProvider = MPLocationsProvider.init()
let query = MPLocationQuery.init()
var locations:[MPLocation] = []
var delegate:MySearchControllerDelegate? = nil
let tableView = UITableView.init()
let searchBar = UISearchBar.init()

In viewDidLoad, wire up your view controller to the tableview and search bar.

searchBar.delegate = self
tableView.delegate = self
tableView.dataSource = self

Register a class for the reusable table view cell.

tableView.register(UITableViewCell.self, forCellReuseIdentifier: "reuseIdentifier")

Arrange the search bar and the table view in a stack view.

let stackView = UIStackView.init(arrangedSubviews: [searchBar, tableView])
stackView.axis = .vertical
view = stackView

In MySearchController, implement the numberOfSections method, return 1.

func numberOfSections(in tableView: UITableView) -> Int {
    return 1
}

Implement the numberOfRowsInSection method, return the length of your locations array.

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return locations.count
}

Implement the textDidChange method:

• Change the query objects query property to reflect the current search text
• Call getLocationsUsing with the modified query
• In the callback block, reset the locations array with new results
• Reload table view

func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
    query.query = searchText
    query.queryMode = .autocomplete
    locationsProvider.getLocationsUsing(query) { (locationData, error) in
        if error == nil {
            self.locations = locationData!.list!
            self.tableView.reloadData()
        }
    }
}

Implement the tableView:cellForRowAt method. Set the cell.textLabel.text to reflect the name of the location of same index.

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "reuseIdentifier", for: indexPath)
    cell.textLabel?.text = locations[indexPath.row].name
    return cell
}

Implement the tableView:didSelectRowAt method. In this example we just call the delegate method and dismiss the view controller.

Delegate method will be handled by SearchMapController.

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    delegate?.didSelectLocation(location: locations[indexPath.row])
    self.dismiss(animated: true, completion: nil)
}

See the sample in MySearchController.swift