Nhận thông tin tuyến đường

Hãy làm theo hướng dẫn này để thiết lập ứng dụng của bạn nhằm truy xuất thời gian, quãng đường và chặng đường cho tuyến đường hiện tại.

Tổng quan

Để lấy thông tin về tuyến đường hiện tại, hãy lấy thuộc tính thích hợp từ thực thể navigator:

Xem mã

/*
 * Copyright 2017 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 {

  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)

    // Show the terms and conditions.
    let companyName = "Ride Sharing Co."
    GMSNavigationServices.showTermsAndConditionsDialogIfNeeded(
      withCompanyName: companyName
    ) { termsAccepted in
      guard termsAccepted else {
        // Handle the case when the user rejects the terms and conditions.
        return
      }
      // Enable navigation after the user accepts the terms.
      self.mapView.isNavigationEnabled = true
      // Request authorization to use location services.
      self.locationManager.requestAlwaysAuthorization()
    }

    self.view = mapView
    makeButtons()
  }

  // Create a route and start guidance.
  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()
  }

  func getTimeToNextDestination() {
    if let navigator = mapView.navigator {
      let time = navigator.timeToNextDestination
      let minutes = floor(time / 60)
      let seconds = round(time - minutes * 60)
      print("Time to next destination: \(minutes):\(seconds)")
    }
  }

  func getDistanceToNextDestination() {
    if let navigator = mapView.navigator {
      let distance = navigator.distanceToNextDestination
      let miles = distance * 0.00062137
      print("Distance to next destination: \(miles) miles.")
    }
  }

  func getCurrentRouteLeg() {
    if let navigator = mapView.navigator {
      let currentLeg = navigator.currentRouteLeg
      let nextDestination = currentLeg?.destinationWaypoint?.title ?? "Not Available"
      let lat = currentLeg?.destinationCoordinate.latitude.description ?? "Not Available"
      let lng = currentLeg?.destinationCoordinate.longitude.description ?? "Not Available"
      print("Destination: \(nextDestination) at (\(lat),\(lng)")
    }
  }

  func getTraveledPath() {
    if let navigator = mapView.navigator {
      let latestPath = navigator.traveledPath
      if latestPath.count() > 0 {
        let begin: CLLocationCoordinate2D = latestPath.coordinate(at: 0)
        let current: CLLocationCoordinate2D = latestPath.coordinate(at: latestPath.count() - 1)
        print(
          "Path from (\(begin.latitude),\(begin.longitude)) to (\(current.latitude),\(current.longitude))"
        )
      }
    }
  }

  // Add some buttons to the view.
  func makeButtons() {
    // 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)

    // Get the time to the next destination.
    let timeButton = UIButton(frame: CGRect(x: 5, y: 190, width: 200, height: 35))
    timeButton.backgroundColor = .blue
    timeButton.alpha = 0.5
    timeButton.setTitle("Time to next destination", for: .normal)
    timeButton.addTarget(self, action: #selector(getTimeToNextDestination), for: .touchUpInside)
    self.mapView.addSubview(timeButton)

    // Get the distance to the next destination.
    let distanceButton = UIButton(frame: CGRect(x: 5, y: 230, width: 200, height: 35))
    distanceButton.backgroundColor = .blue
    distanceButton.alpha = 0.5
    distanceButton.setTitle("Distance to next destination", for: .normal)
    distanceButton.addTarget(
      self, action: #selector(getDistanceToNextDestination), for: .touchUpInside)
    self.mapView.addSubview(distanceButton)

    // Get the current route leg.
    let routeButton = UIButton(frame: CGRect(x: 5, y: 270, width: 200, height: 35))
    routeButton.backgroundColor = .blue
    routeButton.alpha = 0.5
    routeButton.setTitle("Get current route leg", for: .normal)
    routeButton.addTarget(self, action: #selector(getCurrentRouteLeg), for: .touchUpInside)
    self.mapView.addSubview(routeButton)

    // Get the most recently traveled path.
    let pathButton = UIButton(frame: CGRect(x: 5, y: 310, width: 200, height: 35))
    pathButton.backgroundColor = .blue
    pathButton.alpha = 0.5
    pathButton.setTitle("Get traveled path", for: .normal)
    pathButton.addTarget(self, action: #selector(getTraveledPath), for: .touchUpInside)
    self.mapView.addSubview(pathButton)

  }

}
 
/*
 * Copyright 2017 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 ()

@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];

  // 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 makeButtons];
}

// Create a route and start guidance.
- (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.cameraMode = GMSNavigationCameraModeFollowing;
                               [_mapView.locationSimulator simulateLocationsAlongExistingRoute];
                             }];

  [_mapView.roadSnappedLocationProvider startUpdatingLocation];
}

- (void)getTimeToNextDestination {
  NSTimeInterval time = _mapView.navigator.timeToNextDestination;
  int minutes = floor(time/60);
  int seconds = round(time - minutes * 60);
  NSLog(@"%@", [NSString stringWithFormat:@"Time to next destination: %i:%i.", minutes, seconds]);
}

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

- (void)getCurrentRouteLeg {
  GMSRouteLeg *currentSegment = _mapView.navigator.currentRouteLeg;
  NSString *nextDestination = currentSegment.destinationWaypoint.title;
  CLLocationDegrees lat = currentSegment.destinationCoordinate.latitude;
  CLLocationDegrees lng = currentSegment.destinationCoordinate.longitude;
  NSLog(@"%@", [NSString stringWithFormat:@"%@, %f/%f", nextDestination, lat, lng]);
}

- (void)getTraveledPath {
  GMSPath *latestPath = _mapView.navigator.traveledPath;
  if (latestPath.count > 0) {
    CLLocationCoordinate2D begin = [latestPath coordinateAtIndex:0];
    CLLocationCoordinate2D current = [latestPath coordinateAtIndex:latestPath.count - 1];
    NSLog(@"Path from %f/%f to %f/%f",
          begin.latitude,
          begin.longitude,
          current.latitude,
          current.longitude);
  }
}

#pragma mark - Buttons and things

// Add some buttons to the view.
- (void)makeButtons {
  // Start navigation.
  UIButton *navButton = [UIButton buttonWithType:UIButtonTypeCustom];
  [navButton addTarget:self
                action:@selector(startNav)
      forControlEvents:UIControlEventTouchUpInside];
  [navButton setTitle:@"Start navigation" forState:UIControlStateNormal];
  [navButton setBackgroundColor:[UIColor blueColor]];
  [navButton setAlpha:0.5];
  navButton.frame = CGRectMake(5.0, 150.0, 200.0, 35.0);
  [_mapView addSubview:navButton];

  // Get the time to the next destination.
  UIButton *timeButton = [UIButton buttonWithType:UIButtonTypeCustom];
  [timeButton addTarget:self
                 action:@selector(getTimeToNextDestination)
       forControlEvents:UIControlEventTouchUpInside];
  [timeButton setTitle:@"Time to next destination" forState:UIControlStateNormal];
  [timeButton setBackgroundColor:[UIColor blueColor]];
  [timeButton setAlpha:0.5];
  timeButton.frame = CGRectMake(5.0, 190.0, 200.0, 35.0);
  [_mapView addSubview:timeButton];

  // Get the distance to the next destination.
  UIButton *distanceButton = [UIButton buttonWithType:UIButtonTypeCustom];
  [distanceButton addTarget:self
                  action:@selector(getDistanceToNextDestination)
        forControlEvents:UIControlEventTouchUpInside];
  [distanceButton setTitle:@"Distance to next destination" forState:UIControlStateNormal];
  [distanceButton setBackgroundColor:[UIColor blueColor]];
  [distanceButton setAlpha:0.5];
  distanceButton.frame = CGRectMake(5.0, 230.0, 200.0, 35.0);
  [_mapView addSubview:distanceButton];

  // Get the current route leg.
  UIButton *routeButton = [UIButton buttonWithType:UIButtonTypeCustom];
  [routeButton addTarget:self
                  action:@selector(getCurrentRouteLeg)
        forControlEvents:UIControlEventTouchUpInside];
  [routeButton setTitle:@"Get current route leg" forState:UIControlStateNormal];
  [routeButton setBackgroundColor:[UIColor blueColor]];
  [routeButton setAlpha:0.5];
  routeButton.frame = CGRectMake(5.0, 270.0, 200.0, 35.0);
  [_mapView addSubview:routeButton];

  // Get the most recently traveled path.
  UIButton *pathButton = [UIButton buttonWithType:UIButtonTypeCustom];
  [pathButton addTarget:self
                 action:@selector(getTraveledPath)
       forControlEvents:UIControlEventTouchUpInside];
  [pathButton setTitle:@"Get current route leg" forState:UIControlStateNormal];
  [pathButton setBackgroundColor:[UIColor blueColor]];
  [pathButton setAlpha:0.5];
  pathButton.frame = CGRectMake(5.0, 310.0, 200.0, 35.0);
  [_mapView addSubview:pathButton];
}


@end

Xem thời gian đến điểm đến tiếp theo

Để biết thời gian đến điểm đến tiếp theo, hãy gọi timeToNextDestination(). Thao tác này sẽ trả về giá trị NSTimeInterval. Ví dụ sau đây cho thấy cách ghi lại thời gian đến đích tiếp theo:

SwiftObjective-C

if let navigator = mapView.navigator {
  let time = navigator.timeToNextDestination
  let minutes = floor(time/60)
  let seconds = round(time - minutes * 60)
  NSLog("Time to next destination: %.0f:%.0f", minutes, seconds)
}


NSTimeInterval time = _mapView.navigator.timeToNextDestination;
int minutes = floor(time/60);
int seconds = round(time - minutes * 60);
NSLog(@"%@", [NSString stringWithFormat:@"Time to next destination: %i:%i.", minutes, seconds]);

Xác định khoảng cách đến điểm đến tiếp theo

Để biết khoảng cách đến điểm đến tiếp theo, hãy gọi distanceToNextDestination(). Thao tác này sẽ trả về giá trị CLLocationDistance. Đơn vị được chỉ định bằng mét.

SwiftObjective-C

if let navigator = mapView.navigator {
  let distance = navigator.distanceToNextDestination
  let miles = distance * 0.00062137
  NSLog("Distance to next destination: %.2f miles.", miles)
}


CLLocationDistance distance = _mapView.navigator.distanceToNextDestination;
double miles = distance * 0.00062137;
NSLog(@"%@", [NSString stringWithFormat:@"Distance to next destination: %.2f.", miles]);

Nhận thông tin về tình trạng giao thông đến điểm đến tiếp theo

Để nhận giá trị cho biết luồng lưu lượng truy cập đến đích đến tiếp theo, hãy gọi delayCategoryToNextDestination. Thông số này trả về GMSNavigationDelayCategory. Ví dụ sau đây cho thấy cách đánh giá kết quả và ghi lại thông báo lưu lượng truy cập:

SwiftObjective-C

if let navigator = mapView.navigator {
  // insert sample for evaluating traffic value
  let delay = navigator.delayCategoryToNextDestination
  let traffic = "unavailable"
  switch delay {
    case .noData:
      traffic = "unavailable"
    case .heavy:
      traffic = "heavy"
    case .medium:
      traffic = "moderate"
    case .light:
      traffic = "light"
    default:
      traffic = "unavailable"
  }
  print("Traffic is \(traffic).")
}


GMSNavigationDelayCategory delay = mapView.navigator.delayCategoryToNextDestination;
NSString *traffic = @"";

switch (delayCategory) {
    case GMSNavigationDelayCategoryNoData:
      traffic = @"No Data";
      break;
    case GMSNavigationDelayCategoryHeavy:
      traffic = @"Heavy";
      break;
    case GMSNavigationDelayCategoryMedium:
      traffic = @"Medium";
      break;
    case GMSNavigationDelayCategoryLight:
      traffic = @"Light";
      break;
    default:
      NSLog(@"Invalid delay category: %zd", delayCategory);
 }

NSLog(@"%@", [NSString stringWithFormat:@"Traffic is %@.", traffic]);

Nhận thông tin về chặng bay hiện tại

Để lấy thông tin về chặng đường hiện tại, hãy gọi currentRouteLeg. Thao tác này sẽ trả về một thực thể GMSRouteLeg, từ đó bạn có thể lấy:

  • Điểm đến của chặng.
  • Toạ độ cuối cùng trong chặng.
  • Đường dẫn chứa các toạ độ tạo nên chặng đường.

Ví dụ sau đây cho thấy cách ghi lại tiêu đề và toạ độ lat/lng cho chặng đường tiếp theo:

SwiftObjective-C

if let navigator = mapView.navigator {
  let currentLeg = navigator.currentRouteLeg
  let nextDestination = currentLeg?.destinationWaypoint?.title
  let lat = currentLeg?.destinationCoordinate.latitude.description
  let lng = currentLeg?.destinationCoordinate.longitude.description
  NSLog(nextDestination! + ", " + lat! + "/" + lng!)
}


GMSRouteLeg *currentSegment = _mapView.navigator.currentRouteLeg;
NSString *nextDestination = currentSegment.destinationWaypoint.title;
CLLocationDegrees lat = currentSegment.destinationCoordinate.latitude;
CLLocationDegrees lng = currentSegment.destinationCoordinate.longitude;
NSLog(@"%@", [NSString stringWithFormat:@"%@, %f/%f", nextDestination, lat, lng]);

Lấy đường đi gần đây nhất

Để nhận đường đi gần đây nhất, hãy gọi traveledPath. Thao tác này sẽ trả về một bản sao GMSPath đã được đơn giản hoá để xoá các điểm thừa (ví dụ: chuyển các điểm cùng tuyến liên tiếp thành một đoạn đường thẳng). Đường dẫn này trống cho đến khi bắt đầu chỉ đường. Ví dụ sau đây cho thấy cách lấy đường dẫn đã đi gần đây nhất:

SwiftObjective-C

if let navigator = mapView.navigator {
  let latestPath = navigator.traveledPath
  if latestPath.count() > 0 {
    let begin: CLLocationCoordinate2D = latestPath.coordinate(at: 0)
    let current: CLLocationCoordinate2D = latestPath.coordinate(at: latestPath.count() - 1)
    print("Path from (\(begin.latitude),\(begin.longitude)) to (\(current.latitude),\(current.longitude))")
  }
}


GMSPath *latestPath = mapView.navigator.traveledPath;
if (latestPath.count > 0) {
  CLLocationCoordinate2D begin = [latestPath coordinateAtIndex:0];
  CLLocationCoordinate2D current = [latestPath coordinateAtIndex:latestPath.count - 1];
  NSLog(@"Path from %f/%f to %f/%f",
        begin.latitude,
        begin.longitude,
        current.latitude,
        current.longitude);
}