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Merge pull request #267 from IFTTT/bugfix/duplicate_region_identifier…
…_fix Region registration fixes
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195
Examples/GroceryExpress/AddressSelectionViewController.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,195 @@ | ||
| // | ||
| // AddressSelectionViewController.swift | ||
| // Grocery Express | ||
| // | ||
| // Copyright © 2021 IFTTT. All rights reserved. | ||
| // | ||
|
|
||
| import Foundation | ||
| import UIKit | ||
| import MapKit | ||
| import Contacts | ||
|
|
||
| /// Displays a map and a textfield to search for locations. | ||
| final class AddressSelectionViewController: UIViewController { | ||
|
|
||
| /// The result of the search | ||
| struct Result { | ||
| let placemark: MKPlacemark | ||
| let formattedAddress: String | ||
| } | ||
|
|
||
| // MARK: - Public | ||
| var onAddressSelect: ((Result) -> Void)? | ||
|
|
||
| // MARK: - Private IBOutlets | ||
| @IBOutlet private weak var mapView: MKMapView! | ||
|
|
||
| // MARK: - Private variables | ||
| private var resultSearchController: UISearchController? = nil | ||
| private let locationManager = CLLocationManager() | ||
| private var selectedItem: Result? = nil | ||
|
|
||
| static func instantiate() -> AddressSelectionViewController { | ||
| guard let viewController = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "AddressSelectionViewController") as? AddressSelectionViewController else { | ||
| fatalError("Missing view controller with identifier AddressSelectionViewController in Main storyboard.") | ||
| } | ||
| return viewController | ||
| } | ||
|
|
||
| override func viewDidLoad() { | ||
| super.viewDidLoad() | ||
|
|
||
| locationManager.delegate = self | ||
| locationManager.desiredAccuracy = kCLLocationAccuracyBest | ||
| locationManager.requestWhenInUseAuthorization() | ||
| locationManager.requestLocation() | ||
|
|
||
| let locationSearchTable = LocationSearchTableViewController() | ||
| locationSearchTable.delegate = self | ||
| resultSearchController = UISearchController(searchResultsController: locationSearchTable) | ||
| resultSearchController?.searchResultsUpdater = locationSearchTable | ||
|
|
||
| if let searchBar = resultSearchController?.searchBar { | ||
| searchBar.sizeToFit() | ||
| searchBar.placeholder = "Enter a place" | ||
| navigationItem.titleView = searchBar | ||
| } | ||
|
|
||
| resultSearchController?.hidesNavigationBarDuringPresentation = false | ||
| resultSearchController?.dimsBackgroundDuringPresentation = true | ||
| definesPresentationContext = true | ||
|
|
||
| let continueButton = UIBarButtonItem(barButtonSystemItem: .done, target: self, action: #selector(doneTapped)) | ||
| navigationItem.rightBarButtonItem = continueButton | ||
| continueButton.isEnabled = false | ||
| } | ||
|
|
||
| @objc func doneTapped() { | ||
| guard let selectedItem = selectedItem else { return } | ||
| onAddressSelect?(selectedItem) | ||
| } | ||
| } | ||
|
|
||
| extension AddressSelectionViewController: LocationSearchSelectable { | ||
| func didSelect(_ placemark: MKPlacemark, formattedAddress: String) { | ||
| dismiss(animated: true, completion: { [weak self] in | ||
| guard let self = self else { return } | ||
|
|
||
| self.navigationItem.rightBarButtonItem?.isEnabled = true | ||
| self.selectedItem = .init(placemark: placemark, formattedAddress: formattedAddress) | ||
| self.mapView.removeAnnotations(self.mapView.annotations) | ||
| let annotation = MKPointAnnotation() | ||
| annotation.coordinate = placemark.coordinate | ||
| annotation.title = placemark.name | ||
| if let city = placemark.locality, | ||
| let state = placemark.administrativeArea { | ||
| annotation.subtitle = "\(city) \(state)" | ||
| } | ||
| self.mapView.addAnnotation(annotation) | ||
| let span = MKCoordinateSpan(latitudeDelta: 0.05, longitudeDelta: 0.05) | ||
| let region = MKCoordinateRegion(center: placemark.coordinate, span: span) | ||
| self.mapView.setRegion(region, animated: true) | ||
| }) | ||
| } | ||
| } | ||
|
|
||
| protocol LocationSearchSelectable: class { | ||
| func didSelect(_ placemark: MKPlacemark, formattedAddress: String) | ||
| } | ||
|
|
||
| class LocationSearchTableViewController : UITableViewController { | ||
|
|
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| var delegate: LocationSearchSelectable? | ||
|
|
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| private var selectedRegion: MKCoordinateRegion = .init() | ||
| private var items: [MKMapItem] = [] | ||
| private var postalAddressFormatter = CNPostalAddressFormatter() | ||
| private var currentSearch: MKLocalSearch? = nil | ||
|
|
||
| override func viewDidLoad() { | ||
| super.viewDidLoad() | ||
| postalAddressFormatter.style = .mailingAddress | ||
| tableView.register(UITableViewCell.self, forCellReuseIdentifier: "cell") | ||
| } | ||
| } | ||
|
|
||
| extension LocationSearchTableViewController: UISearchResultsUpdating { | ||
| func updateSearchResults(for searchController: UISearchController) { | ||
| guard let searchBarText = searchController.searchBar.text else { return } | ||
| currentSearch?.cancel() | ||
|
|
||
| let request = MKLocalSearch.Request() | ||
| request.naturalLanguageQuery = searchBarText | ||
| request.region = selectedRegion | ||
| currentSearch = MKLocalSearch(request: request) | ||
| currentSearch?.start { response, _ in | ||
| guard let response = response else { | ||
| return | ||
| } | ||
| self.items = response.mapItems | ||
| self.tableView.reloadData() | ||
| } | ||
| } | ||
| } | ||
|
|
||
| extension LocationSearchTableViewController { | ||
| override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { | ||
| return items.count | ||
| } | ||
|
|
||
| override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { | ||
| var cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) | ||
| if cell.detailTextLabel == nil { | ||
| cell = UITableViewCell(style: .subtitle, reuseIdentifier: "cell") | ||
| } | ||
|
|
||
| let item = items[indexPath.row] | ||
| let selectedItem = item.placemark | ||
| cell.textLabel?.text = selectedItem.name | ||
|
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| var addressString = "" | ||
|
|
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| if #available(iOS 11.0, *) { | ||
| if let postalAddress = selectedItem.postalAddress { | ||
| addressString = postalAddressFormatter.string(from: postalAddress) | ||
| } | ||
| } else { | ||
| // Fallback on earlier versions | ||
| } | ||
| cell.detailTextLabel?.text = addressString | ||
| return cell | ||
| } | ||
|
|
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| override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) { | ||
| let selectedItem = items[indexPath.row].placemark | ||
|
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| var formattedAddress = "" | ||
| if #available(iOS 11.0, *) { | ||
| if let postalAddress = selectedItem.postalAddress { | ||
| formattedAddress = postalAddressFormatter.string(from: postalAddress) | ||
| } | ||
| } | ||
| delegate?.didSelect(selectedItem, formattedAddress: formattedAddress) | ||
| } | ||
| } | ||
|
|
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| extension AddressSelectionViewController: CLLocationManagerDelegate { | ||
| func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) { | ||
| if status == .authorizedWhenInUse { | ||
| locationManager.requestLocation() | ||
| } | ||
| } | ||
|
|
||
| func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) { | ||
| if let location = locations.first { | ||
| let span = MKCoordinateSpan(latitudeDelta: 0.05, longitudeDelta: 0.05) | ||
| let region = MKCoordinateRegion(center: location.coordinate, span: span) | ||
| mapView.setRegion(region, animated: true) | ||
| } | ||
| } | ||
|
|
||
| func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) { | ||
| print("Manager failed with error: \(error)") | ||
| } | ||
| } |
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