ios - 如何定位 Google 地点自动完成功能？

Question

我正在使用这个Tutorial由 Google 使用 Swift 将 Google Places Autocomplete 实现到 iOS 应用程序中，但我试图将结果限制到特定位置，如 link说是可能的，但对于我的生活，我看不到任何地方可以这样做..............

这是 View Controller :

import UIKit
import GooglePlaces

class ViewController: UIViewController {

  var resultsViewController: GMSAutocompleteResultsViewController?
  var searchController: UISearchController?
  var resultView: UITextView?

  override func viewDidLoad() {
    super.viewDidLoad()

    resultsViewController = GMSAutocompleteResultsViewController()
    resultsViewController?.delegate = self

    searchController = UISearchController(searchResultsController: resultsViewController)
    searchController?.searchResultsUpdater = resultsViewController

    let subView = UIView(frame: CGRect(x: 0, y: 65.0, width: 350.0, height: 45.0))

    subView.addSubview((searchController?.searchBar)!)
    view.addSubview(subView)
    searchController?.searchBar.sizeToFit()
    searchController?.hidesNavigationBarDuringPresentation = false

    // When UISearchController presents the results view, present it in
    // this view controller, not one further up the chain.
    definesPresentationContext = true
  }
}

// Handle the user's selection.
extension ViewController: GMSAutocompleteResultsViewControllerDelegate {
  func resultsController(_ resultsController: GMSAutocompleteResultsViewController,
                         didAutocompleteWith place: GMSPlace) {
    searchController?.isActive = false
    // Do something with the selected place.
    print("Place name: \(place.name)")
    print("Place address: \(place.formattedAddress)")
    print("Place attributions: \(place.attributions)")
  }

  func resultsController(_ resultsController: GMSAutocompleteResultsViewController,
                         didFailAutocompleteWithError error: Error){
    // TODO: handle the error.
    print("Error: ", error.localizedDescription)
  }

  // Turn the network activity indicator on and off again.
  func didRequestAutocompletePredictions(forResultsController resultsController: GMSAutocompleteResultsViewController) {
    UIApplication.shared.isNetworkActivityIndicatorVisible = true
  }

  func didUpdateAutocompletePredictions(forResultsController resultsController: GMSAutocompleteResultsViewController) {
    UIApplication.shared.isNetworkActivityIndicatorVisible = false
  }
}

Answer 1

在文档中它说明了用于此目的的类。

A GMSCoordinateBounds object biasing the results to a specific area specified by latitude and longitude bounds.

注意:您无法完全删除这些范围之外的所有内容，如果人们搜索埃菲尔铁塔，他们仍然会看到它。但 99% 的结果可能都在这些范围内。这只是一个偏见搜索。

给 GMSColinedBounds 类提供角点经度和纬度，就这样了。

它的用法如下:

let northEastBoundsCorner = CLLocationCoordinate2D(latitude: -33.843366,
                                            longitude: 151.134002)
let southWestBoundsCorner = CLLocationCoordinate2D(latitude: -33.875725,
                                            longitude: 151.200349)
let bounds = GMSCoordinateBounds(coordinate: neBoundsCorner,
                                 coordinate: swBoundsCorner) 
func placeAutocomplete() {
     let filter = GMSAutocompleteFilter()
     filter.type = .establishment
     placesClient.autocompleteQuery("Sydney Oper", bounds: bounds, filter: filter, callback: {(results, error) -> Void in
     if let error = error {
        print("Autocomplete error \(error)")
        return
     }
     if let results = results {
        for result in results {
            print("Result \(result.attributedFullText) with placeID \(result.placeID)")
        }
     }
}) }

这是他们使用它的文档中的网址: Set the GMSCoordinateBounds of autocomplete