Memproses peristiwa navigasi

Pemberitahuan: Protokol GMSNavigatorDelegate dan GMSRoadSnappedLocationProviderDelegate sudah dihapuskan di Navigation SDK for iOS versi 2.0. Lihat catatan rilis untuk mengetahui detail penggantian.

Gunakan panduan ini untuk memungkinkan aplikasi Anda memproses dan merespons berbagai peristiwa yang berubah saat pengguna menavigasi sepanjang rute. Panduan ini tidak membahas cara menentukan rute, hanya cara merespons peristiwa di sepanjang rute.

Ringkasan

Navigation SDK for iOS menyediakan pemroses yang terkait dengan lokasi pengguna dan kondisi di sepanjang rute serta data waktu dan jarak yang penting. Di pengontrol tampilan peta, aplikasi Anda harus menerapkan protokol untuk pemroses ini: GMSRoadSnappedLocationProviderListener dan GMSNavigatorListener.

Daftar ini menunjukkan metode pemroses yang tersedia untuk peristiwa navigasi:

• GMSNavigatorListener.didArriveAtWaypoint, dipicu saat tujuan tercapai.
• GMSNavigatorListener.navigatorDidChangeRoute, dipicu saat rute berubah.
• GMSNavigatorListener.didUpdateRemainingTime, dipanggil berulang kali saat waktu menempuh tujuan berikutnya berubah, saat panduan aktif.
• GMSNavigatorListener.didUpdateRemainingDistance, dipanggil berulang kali saat jarak ke tujuan berikutnya berubah, saat panduan aktif.
• GMSNavigatorListener.didUpdateDelayCategory, dipanggil saat kategori keterlambatan ke tujuan berikutnya berubah, saat panduan aktif.
• GMSNavigatorListener.didChangeSuggestedLightingMode, dipicu saat perkiraan kondisi pencahayaan diperbarui. Misalnya, saat malam tiba di lokasi pengguna saat ini, pencahayaan akan berubah.
• GMSNavigatorListener.didUpdateSpeedingPercentage, dipicu saat pengemudi melebihi batas kecepatan.
• GMSRoadSnappedLocationProviderListener.didUpdateLocation, dipanggil berulang kali saat lokasi pengguna berubah.

Catatan: Jika desain aplikasi Anda memerlukan penanganan peristiwa di luar cakupan panduan ini, pertimbangkan untuk menggunakan protokol GMSMapViewDelegate dari Maps SDK for iOS. Protokol ini memungkinkan pemrosesan peristiwa lain, seperti perubahan kamera atau kedekatan dengan lokasi menarik. Lihat Peristiwa untuk mengetahui detailnya.

Melihat kode

Tampilkan/Sembunyikan kode Swift untuk pemroses peristiwa.

/*
 * Copyright 2020 Google Inc. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import GoogleNavigation
import UIKit

class ViewController: UIViewController,
  GMSNavigatorListener,
  GMSRoadSnappedLocationProviderListener
{

  var mapView: GMSMapView!
  var locationManager: CLLocationManager!

  override func loadView() {

    locationManager = CLLocationManager()

    let camera = GMSCameraPosition.camera(withLatitude: 47.67, longitude: -122.20, zoom: 14)
    mapView = GMSMapView.map(withFrame: CGRect.zero, camera: camera)

    // Add listeners for GMSNavigator and GMSRoadSnappedLocationProvider.
    mapView.navigator?.add(self)
    mapView.roadSnappedLocationProvider?.add(self)

    // Set the time update threshold (seconds) and distance update threshold (meters).
    mapView.navigator?.timeUpdateThreshold = 10
    mapView.navigator?.distanceUpdateThreshold = 100

    // Show the terms and conditions.
    let companyName = "Ride Sharing Co."
    GMSNavigationServices.showTermsAndConditionsDialogIfNeeded(
      withCompanyName: companyName
    ) { termsAccepted in
      if termsAccepted {
        // Enable navigation if the user accepts the terms.
        self.mapView.isNavigationEnabled = true

        // Request authorization to use location services.
        self.locationManager.requestAlwaysAuthorization()

        // Request authorization for alert notifications which deliver guidance instructions
        // in the background.
        UNUserNotificationCenter.current().requestAuthorization(options: [.alert]) {
          granted, error in
          // Handle denied authorization to display notifications.
          if !granted || error != nil {
            print("Authorization to deliver notifications was rejected.")
          }
        }
      } else {
        // Handle the case when the user rejects the terms and conditions.
      }
    }

    view = mapView

    makeButton()
  }

  // Create a route and start guidance.
  @objc func startNav() {
    var destinations = [GMSNavigationWaypoint]()
    destinations.append(
      GMSNavigationWaypoint.init(
        placeID: "ChIJnUYTpNASkFQR_gSty5kyoUk",
        title: "PCC Natural Market")!)
    destinations.append(
      GMSNavigationWaypoint.init(
        placeID: "ChIJJ326ROcSkFQRBfUzOL2DSbo",
        title: "Marina Park")!)

    mapView.navigator?.setDestinations(destinations) { routeStatus in
      guard routeStatus == .OK else {
        print("Handle route statuses that are not OK.")
        return
      }
      self.mapView.navigator?.isGuidanceActive = true
      self.mapView.cameraMode = .following
      self.mapView.locationSimulator?.simulateLocationsAlongExistingRoute()
    }

    mapView.roadSnappedLocationProvider?.startUpdatingLocation()
  }

  // Listener to handle continuous location updates.
  func locationProvider(
    _ locationProvider: GMSRoadSnappedLocationProvider,
    didUpdate location: CLLocation
  ) {
    print("Location: \(location.description)")
  }

  // Listener to handle speeding events.
  func navigator(
    _ navigator: GMSNavigator, didUpdateSpeedingPercentage percentageAboveLimit: CGFloat
  ) {
    print("Speed is \(percentageAboveLimit) above the limit.")
  }

  // Listener to handle arrival events.
  func navigator(_ navigator: GMSNavigator, didArriveAt waypoint: GMSNavigationWaypoint) {
    print("You have arrived at: \(waypoint.title)")
    mapView.navigator?.continueToNextDestination()
    mapView.navigator?.isGuidanceActive = true
  }

  // Listener for route change events.
  func navigatorDidChangeRoute(_ navigator: GMSNavigator) {
    print("The route has changed.")
  }

  // Listener for time to next destination.
  func navigator(_ navigator: GMSNavigator, didUpdateRemainingTime time: TimeInterval) {
    print("Time to next destination: \(time)")
  }

  // Delegate for distance to next destination.
  func navigator(
    _ navigator: GMSNavigator,
    didUpdateRemainingDistance distance: CLLocationDistance
  ) {
    let miles = distance * 0.00062137
    print("Distance to next destination: \(miles) miles.")
  }

  // Delegate for traffic updates to next destination
  func navigator(
    _ navigator: GMSNavigator,
    didUpdate delayCategory: GMSNavigationDelayCategory
  ) {
    print("Delay category to next destination: \(String(describing: delayCategory)).")
  }

  // Delegate for suggested lighting mode changes.
  func navigator(
    _ navigator: GMSNavigator,
    didChangeSuggestedLightingMode lightingMode: GMSNavigationLightingMode
  ) {
    print("Suggested lighting mode has changed: \(String(describing: lightingMode))")

    // Change to the suggested lighting mode.
    mapView.lightingMode = lightingMode
  }

  // Add a button to the view.
  func makeButton() {
    // Start navigation.
    let navButton = UIButton(frame: CGRect(x: 5, y: 150, width: 200, height: 35))
    navButton.backgroundColor = .blue
    navButton.alpha = 0.5
    navButton.setTitle("Start navigation", for: .normal)
    navButton.addTarget(self, action: #selector(startNav), for: .touchUpInside)
    self.mapView.addSubview(navButton)
  }

}

Tampilkan/Sembunyikan kode Objective-C untuk pemroses peristiwa.

/*
 * Copyright 2020 Google Inc. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#import "ViewController.h"
@import GoogleNavigation;

@interface ViewController () <GMSNavigatorListener, GMSRoadSnappedLocationProviderListener>

@end

@implementation ViewController {
  GMSMapView *_mapView;
  CLLocationManager *_locationManager;
}

- (void)loadView {

  _locationManager = [[CLLocationManager alloc] init];

  GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:47.67
                                                          longitude:-122.20
                                                               zoom:14];
  _mapView = [GMSMapView mapWithFrame:CGRectZero camera:camera];

  // Add listeners for GMSNavigator and GMSRoadSnappedLocationProvider.
  [_mapView.navigator addListener:self];
  [_mapView.roadSnappedLocationProvider addListener:self];

  // Set the time update threshold (seconds) and distance update threshold (meters).
  _mapView.navigator.timeUpdateThreshold = 10;
  _mapView.navigator.distanceUpdateThreshold = 100;

  // Show the terms and conditions.
  NSString *companyName = @"Ride Sharing Co.";
  [GMSNavigationServices
   showTermsAndConditionsDialogIfNeededWithCompanyName:companyName
                                              callback:^(BOOL termsAccepted) {
     if (termsAccepted) {
       // Enable navigation if the user accepts the terms.
       _mapView.navigationEnabled = YES;

       // Request authorization to use location services.
       [_locationManager requestAlwaysAuthorization];

     } else {
       // Handle the case when the user rejects the terms and conditions.
     }
   }];

  self.view = _mapView;

  [self makeButton];
}

// Create a route and initiate navigation.
- (void)startNav {
  NSArray<GMSNavigationWaypoint *> *destinations =
  @[[[GMSNavigationWaypoint alloc] initWithPlaceID:@"ChIJnUYTpNASkFQR_gSty5kyoUk"
                                             title:@"PCC Natural Market"],
    [[GMSNavigationWaypoint alloc] initWithPlaceID:@"ChIJJ326ROcSkFQRBfUzOL2DSbo"
                                             title:@"Marina Park"]];

  [_mapView.navigator setDestinations:destinations
                             callback:^(GMSRouteStatus routeStatus){
                               _mapView.navigator.guidanceActive = YES;
                               _mapView.navigator.sendsBackgroundNotifications = YES;
                               _mapView.cameraMode = GMSNavigationCameraModeFollowing;
                               [_mapView.locationSimulator simulateLocationsAlongExistingRoute];
                             }];

  [_mapView.roadSnappedLocationProvider startUpdatingLocation];
}

#pragma mark - GMSNavigatorListener
// Listener for continuous location updates.
- (void)locationProvider:(GMSRoadSnappedLocationProvider *)locationProvider
      didUpdateLocation:(CLLocation *)location {
  NSLog(@"Location: %@", location.description);
}

// Listener to handle speeding events.
- (void)navigator:(GMSNavigator *)navigator
    didUpdateSpeedingPercentage:(CGFloat)percentageAboveLimit {
  NSLog(@"Speed is %f percent above the limit.", percentageAboveLimit);
}

// Listener to handle arrival events.
- (void)navigator:(GMSNavigator *)navigator didArriveAtWaypoint:(GMSNavigationWaypoint *)waypoint {
  NSLog(@"You have arrived at: %@", waypoint.title);
  [_mapView.navigator continueToNextDestination];
  _mapView.navigator.guidanceActive = YES;
}

// Listener for route change events.
- (void)navigatorDidChangeRoute:(GMSNavigator *)navigator {
  NSLog(@"The route has changed.");
}

// Listener for time to next destination.
- (void)navigator:(GMSNavigator *)navigator didUpdateRemainingTime:(NSTimeInterval)time {
  NSLog(@"Time to next destination: %f", time);
}

// Listener for distance to next destination.
- (void)navigator:(GMSNavigator *)navigator
      didUpdateRemainingDistance:(CLLocationDistance)distance {
  double miles = distance * 0.00062137;
  NSLog(@"%@", [NSString stringWithFormat:@"Distance to next destination: %.2f.", miles]);
}

// Listener for traffic updates for next destination
- (void)navigator:(GMSNavigator *)navigator
    didUpdateDelayCategory:(GMSNavigationDelayCategory)delayCategory {
  NSLog(@"Delay category to next destination: %ld.", delayCategory);
}

// Listener for suggested lighting mode changes.
-(void)navigator:(GMSNavigator *)navigator
      didChangeSuggestedLightingMode:(GMSNavigationLightingMode)lightingMode {
  NSLog(@"Suggested lighting mode has changed: %ld", (long)lightingMode);

  // Change to the suggested lighting mode.
  _mapView.lightingMode = lightingMode;
}

#pragma mark - Programmatic UI elements

// Add a button to the view.
- (void)makeButton {
  // Start navigation.
  UIButton *navButton = [UIButton buttonWithType:UIButtonTypeCustom];
  [navButton addTarget:self
                action:@selector(startNav)
      forControlEvents:UIControlEventTouchUpInside];
  [navButton setTitle:@"Navigate" forState:UIControlStateNormal];
  [navButton setBackgroundColor:[UIColor blueColor]];
  [navButton setAlpha:0.5];
  navButton.frame = CGRectMake(5.0, 150.0, 100.0, 35.0);
  [_mapView addSubview:navButton];
}

@end

Mendeklarasikan kepatuhan terhadap protokol yang diperlukan

Sebelum menerapkan metode navigasi, pengontrol tampilan harus mengadopsi protokol:

Swift

class ViewController:
  UIViewController,
  GMSNavigatorListener,
  GMSRoadSnappedLocationProviderListener
{
}

Objective-C

@interface ViewController () <GMSNavigatorListener, GMSRoadSnappedLocationProviderListener>
@end

Setelah mengadopsi protokol navigasi, tetapkan pemroses ke pengontrol tampilan. Misalnya, Anda dapat menambahkan kode berikut ke metode viewDidLoad().

Swift

mapView.navigator?.add(self)
mapView.roadSnappedLocationProvider?.add(self)

Objective-C

[_mapView.navigator addListener:self];
[_mapView.roadSnappedLocationProvider addListener:self];

Menerima atau menghentikan pembaruan lokasi

Pembaruan lokasi diperlukan untuk menampilkan progres pengguna di peta.

Instance location mengekspos properti berikut:

Properti lokasi	Deskripsi
altitude	Ketinggian saat ini.
coordinate.latitude	Koordinat lintang yang saat ini disesuaikan dengan jalan.
coordinate.longitude	Koordinat bujur yang disesuaikan dengan jalan saat ini.
course	Arah saat ini dalam derajat.
speed	Kecepatan saat ini.
timestamp	Tanggal/waktu pembacaan saat ini.

Perhatian: Pembaruan lokasi dapat memengaruhi daya tahan baterai, jadi aktifkan pembaruan hanya jika diperlukan. Panggil fungsi stopUpdatingLocation

.

Untuk menerima pembaruan lokasi berkelanjutan, panggil mapView.roadSnappedLocationProvider.startUpdatingLocation , dan gunakan GMSRoadSnappedLocationProviderListener untuk menangani peristiwa didUpdateLocation.

Contoh berikut menunjukkan cara memanggil startUpdatingLocation:

Swift

mapView.roadSnappedLocationProvider.startUpdatingLocation()

Objective-C

[_mapView.roadSnappedLocationProvider startUpdatingLocation];

Kode berikut membuat GMSRoadSnappedLocationProviderListener yang menangani peristiwa didUpdateLocation.

Swift

func locationProvider(_ locationProvider: GMSRoadSnappedLocationProvider,
                      didUpdate location: CLLocation) {
  print("Location: \(location.description)")
}

Objective-C

- (void)locationProvider:(GMSRoadSnappedLocationProvider *)locationProvider
       didUpdateLocation:(CLLocation *)location {
  NSLog(@"Location: %@", location.description);
}

Untuk menerima pembaruan lokasi saat aplikasi berada di latar belakang, tetapkan allowsBackgroundLocationUpdates ke benar (true):

Swift

mapView.roadSnappedLocationProvider.allowsBackgroundLocationUpdates = true

Objective-C

 _mapView.roadSnappedLocationProvider.allowsBackgroundLocationUpdates = YES;

Mendeteksi peristiwa kedatangan

Aplikasi Anda menggunakan peristiwa didArriveAtWaypoint untuk mendeteksi saat tujuan telah tercapai. Anda dapat melanjutkan panduan dan maju ke titik jalan berikutnya dengan memanggil continueToNextDestinationWithCompletion(), lalu mengaktifkan kembali panduan. Aplikasi Anda harus mengaktifkan kembali panduan setelah memanggil continueToNextDestinationWithCompletion().

Setelah aplikasi memanggil continueToNextDestinationWithCompletion, navigator tidak lagi memiliki data tentang tujuan sebelumnya. Jika ingin menganalisis informasi tentang segmen rute, Anda harus mengambilnya dari navigator sebelum memanggil continueToNextDestinationWithCompletion().

Contoh kode berikut menunjukkan metode untuk menangani peristiwa didArriveAtWaypoint:

Swift

func navigator(_ navigator: GMSNavigator, didArriveAt waypoint: GMSNavigationWaypoint) {
  print("You have arrived at: \(waypoint.title)")
  mapView.navigator?.continueToNextDestinationWithCompletion { _, _ in }
  mapView.navigator?.isGuidanceActive = true
}

Objective-C

- (void)navigator:(GMSNavigator *)navigator didArriveAtWaypoint:(GMSNavigationWaypoint *)waypoint {
  NSLog(@"You have arrived at: %@", waypoint.title);
  [_mapView.navigator continueToNextDestinationWithCompletion:^(GMSNavigationWaypoint *waypoint,
                                                                GMSRouteStatus status){
  }];
  _mapView.navigator.guidanceActive = YES;
}

Menerima info terbaru perubahan rute

Untuk menerima notifikasi setiap kali rute diubah, buat metode untuk menangani peristiwa navigatorDidChangeRoute. Anda dapat mengakses rute baru dengan menggunakan properti routeLegs dan currentRouteLeg dari GMSNavigator.

Swift

func navigatorDidChangeRoute(_ navigator: GMSNavigator) {
  print("The route has changed.")
}

Objective-C

- (void)navigatorDidChangeRoute:(GMSNavigator *)navigator {
  NSLog(@"The route has changed.");
}

Menerima pembaruan waktu ke tujuan

Untuk menerima pembaruan waktu tempuh ke tujuan secara berkelanjutan, buat metode untuk menangani peristiwa didUpdateRemainingTime. Parameter time memberikan perkiraan waktu, dalam detik, hingga tujuan berikutnya tercapai.

Swift

func navigator(_ navigator: GMSNavigator, didUpdateRemainingTime time: TimeInterval) {
  print("Time to next destination: \(time)")
}

Objective-C

- (void)navigator:(GMSNavigator *)navigator didUpdateRemainingTime:(NSTimeInterval)time {
  NSLog(@"Time to next destination: %f", time);
}

Untuk menetapkan perubahan minimum pada perkiraan waktu ke tujuan berikutnya, tetapkan properti timeUpdateThreshold pada GMSNavigator. Nilai ditentukan dalam detik. Jika properti ini tidak ditetapkan, layanan akan menggunakan nilai default satu detik.

Swift

navigator?.timeUpdateThreshold = 10

Objective-C

navigator.timeUpdateThreshold = 10;

Menerima info terbaru jarak ke tujuan

Untuk menerima pembaruan jarak berkelanjutan ke tujuan, buat metode untuk menangani peristiwa didUpdateRemainingDistance. Parameter distance memberikan perkiraan jarak, dalam meter, ke tujuan berikutnya.

Swift

func navigator(_ navigator: GMSNavigator, didUpdateRemainingDistance distance: CLLocationDistance)
{
  let miles = distance * 0.00062137
  print("Distance to next destination: \(miles) miles.")
}

Objective-C

- (void)navigator:(GMSNavigator *)navigator
    didUpdateRemainingDistance:(CLLocationDistance)distance {
  double miles = distance * 0.00062137;
  NSLog(@"%@", [NSString stringWithFormat:@"Distance to next destination: %.2f.", miles]);
}

Untuk menetapkan perubahan minimum dalam perkiraan jarak ke tujuan berikutnya, tetapkan properti distanceUpdateThreshold pada GMSNavigator (nilai ditentukan dalam meter). Jika properti ini tidak ditetapkan, layanan akan menggunakan nilai default satu meter.

Swift

navigator?.distanceUpdateThreshold = 100

Objective-C

navigator.distanceUpdateThreshold = 100;

Menerima info lalu lintas

Untuk menerima pembaruan berkelanjutan tentang alur lalu lintas untuk rute yang tersisa, buat metode untuk menangani peristiwa didUpdateDelayCategory. Panggilan ke delayCategoryToNextDestination menampilkan GMSNavigationDelayCategory yang memberikan nilai 0 hingga 3. Pembaruan pada kategori didasarkan pada posisi pengguna aplikasi saat ini. Jika data lalu lintas tidak tersedia, GMSNavigationDelayCategory akan menampilkan 0. Angka 1-3 menunjukkan peningkatan aliran dari ringan hingga berat.

Swift

func navigator(_ navigator: GMSNavigator,
               didUpdate delayCategory: GMSNavigationDelayCategory)
{
  print("Traffic flow to next destination: \(delayCategory)")
}

Objective-C

- (void)navigator:(GMSNavigator *)navigator
    didUpdateDelayCategory:(GMSNavigationDelayCategory)delayCategory {
  NSLog(@"Traffic flow to next destination: %ld", (long)delayCategory);
}

Properti GMSNavigationDelayCategory mengekspos tingkat penundaan berikut:

Kategori penundaan	Deskripsi
GMSNavigationDelayCategoryNoData	0 - Tidak tersedia, tidak ada data untuk traffic atau :
	rute.
GMSNavigationDelayCategoryHeavy	1 - Berat.
GMSNavigationDelayCategoryMedium	2 - Sedang.
GMSNavigationDelayCategoryLight	3 - Ringan.

Menerima pembaruan tentang pelanggaran kecepatan

Untuk menerima pembaruan saat pengemudi melebihi batas kecepatan, buat metode untuk menangani peristiwa didUpdateSpeedingPercentage.

Swift

// Listener to handle speeding events.
func navigator(_ navigator: GMSNavigator,
               didUpdateSpeedingPercentage percentageAboveLimit: CGFloat)
{
  print("Speed is \(percentageAboveLimit) above the limit.")
}

Objective-C

// Listener to handle speeding events.
- (void)navigator:(GMSNavigator *)navigator
    didUpdateSpeedingPercentage:(CGFloat)percentageAboveLimit {
  NSLog(@"Speed is %f percent above the limit.", percentageAboveLimit);
}

Mengubah mode pencahayaan yang disarankan

Untuk menerima pembaruan perkiraan perubahan pencahayaan, buat metode untuk menangani peristiwa didChangeSuggestedLightingMode.

Swift

// Define a listener for suggested changes to lighting mode.
func navigator(_ navigator: GMSNavigator,
               didChangeSuggestedLightingMode lightingMode: GMSNavigationLightingMode)
{
  print("Suggested lighting mode has changed: \(String(describing: lightingMode))")

  // Make the suggested change.
  mapView.lightingMode = lightingMode
 }

Objective-C

// Define a listener for suggested changes to lighting mode.
- (void)navigator:(GMSNavigator *)navigator
    didChangeSuggestedLightingMode:(GMSNavigationLightingMode)lightingMode {
  NSLog(@"Suggested lighting mode has changed: %ld", (long)lightingMode);

  // Make the suggested change.
  _mapView.lightingMode = lightingMode;
}