Memproses peristiwa navigasi

Pemberitahuan: GMSNavigatorDelegate dan Protokol GMSRoadSnappedLocationProviderDelegate dinonaktifkan di Navigation SDK untuk iOS versi 2.0. Lihat catatan rilis untuk detail penggantian.

Gunakan panduan ini agar aplikasi Anda dapat memproses dan merespons berbagai peristiwa yang berubah saat pengguna menavigasi di sepanjang rute. Panduan ini tidak mencakup mendefinisikan rute, hanya merespons kejadian di sepanjang rute.

Ringkasan

Navigation SDK for iOS menyediakan pemroses yang terkait dengan lokasi pengguna dan kondisi di sepanjang rute dan data waktu dan jarak yang penting. Pada pengontrol tampilan peta, aplikasi Anda perlu mengadopsi 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 ketika waktu ke tujuan berikutnya berubah, sementara panduan aktif.
• GMSNavigatorListener.didUpdateRemainingDistance, dipanggil berulang kali ketika jarak ke tujuan berikutnya berubah, sementara panduan aktif.
• GMSNavigatorListener.didUpdateDelayCategory, ketika kategori penundaan ke tujuan berikutnya berubah, sementara panduan aktif.
• GMSNavigatorListener.didChangeSuggestedLightingMode, dipicu saat perkiraan kondisi pencahayaan diperbarui. Misalnya ketika 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 , pertimbangkan untuk menggunakan protokol GMSMapViewDelegate Maps SDK for iOS. Protokol ini memungkinkan memproses peristiwa lain, seperti perubahan kamera atau jarak ke 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

Menyatakan kesesuaian dengan protokol yang diperlukan

Sebelum mengimplementasikan metode navigasi, pengontrol tampilan harus menggunakan metode protokol:

Swift

class ViewController: UIViewController, GMSNavigatorListener,
GMSRoadSnappedLocationProviderListener {

Objective-C

@interface ViewController () <GMSNavigatorListener,
GMSRoadSnappedLocationProviderListener>

@end

Setelah mengadopsi protokol navigasi, setel pemroses ke tampilan pengontrol. Misalnya, Anda dapat menambahkan kode berikut ke 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
ketinggian	Ketinggian saat ini.
coordinate.latitude	Koordinat lintang yang ditangkap jalan saat ini.
coordinate.longitude	Koordinat bujur yang ditangkap jalan saat ini.
kursus	Bearing saat ini dalam derajat.
kecepatan	Kecepatan saat ini.
timestamp	Tanggal/waktu pembacaan saat ini.

Perhatian: Update lokasi dapat memengaruhi masa pakai baterai, jadi aktifkan update hanya jika diperlukan. Panggil stopUpdatingLocation .

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

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, setel 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 memiliki tercapai. Anda dapat melanjutkan panduan dan maju ke titik jalan berikutnya dengan memanggil continueToNextDestination(), lalu mengaktifkan kembali panduan. Aplikasi Anda harus mengaktifkan kembali panduan setelah memanggil continueToNextDestination().

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

Contoh kode berikut menunjukkan metode untuk menangani didArriveAtWaypoint acara:

Swift

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

Objective-C

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

Menerima pembaruan 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 waktu berkelanjutan hingga update tujuan, buat metode untuk menangani Peristiwa didUpdateRemainingTime. Parameter time memberikan estimasi 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 dalam perkiraan waktu ke tujuan berikutnya, tetapkan Properti timeUpdateThreshold di GMSNavigator. Nilainya ditentukan dalam detik. Jika properti ini tidak disetel, layanan akan menggunakan nilai default satu kedua.

Swift

navigator?.timeUpdateThreshold = 10

Objective-C

navigator.timeUpdateThreshold = 10;

Menerima pembaruan jarak ke tujuan

Untuk menerima jarak berkelanjutan ke pembaruan tujuan, buat metode yang akan ditangani 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 menyetel perubahan minimum dalam perkiraan jarak ke tujuan berikutnya, setel atribut Properti distanceUpdateThreshold di GMSNavigator (nilai ditentukan di meter). Jika properti ini tidak disetel, layanan akan menggunakan nilai default satu pengukur.

Swift

navigator?.distanceUpdateThreshold = 100

Objective-C

navigator.distanceUpdateThreshold = 100;

Menerima info terbaru lalu lintas

Untuk menerima pembaruan berkelanjutan dari arus 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. Jika data lalu lintas tidak tersedia, GMSNavigationDelayCategory menampilkan 0. Angka 1-3, menunjukkan peningkatan mengalir dari ringan ke 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 memperlihatkan tingkat penundaan berikut:

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

Menerima update kecepatan.

Untuk menerima update 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; }