Customize route polylines

Before you customize route polylines (or markers), you first need to initialize the UI customization options.

Initialize UI customization options

The recommended callback used to initially set the UI customization options is declared in the GMTCMapViewDelegate. The mapViewDidInitialize callback is triggered when the GMTCMapView object is ready to render the map. The style coordinator is initialized, but no UI elements are present.

/** ViewController.swift */

class ViewController: UIViewController, GMTCMapViewDelegate {

  // MARK: - GMTCMapViewDelegate

  func mapViewDidInitialize(_ mapview: GMTCMapView) {
    // Set the UI customization options here.
  }
}

/** ViewController.m */

@interface ViewController () <GMTCMapViewDelegate>

#pragma mark GMTCMapViewDelegate

- (void)mapViewDidInitialize:(GMTCMapView *)mapview {
  // Set the UI customization options here.
}

Customize polylines

Polyline customization is set using GMTCConsumerMapStyleCoordinator#setPolylineStyleOptions(_:polylineType:).

The following example shows how to set polyline style options:

Polyline types

You can customize the following polyline types:

• GMTCPolylineType.activeRoute: The route the vehicle is taking to the rider's next point, whether it is the pickup or the drop-off.
• GMTCPolylineType.remainingRoute: The segment of the trip that remains after the vehicle completes the GMTCPolylineType.activeRoute.

Both of these types are displayed throughout a shared journey.

Polyline properties

The properties you can customize for each polyline are a subset of the properties provided on Google Maps PolylineOptions. The Consumer SDK GMTCPolylineStyleOptions properties have the following traits:

• Built using an initializer.
• Can be immutable or mutable if you want to provide custom values for any property.
• Have default values.

You can customize the following properties:

• color
• width
• isVisible: To disable a polyline, set isVisible to false.
• isTrafficEnabled: This property is set to false by default.

Example

/** MapViewController.swift */

private func updatePolylineUIOptions() {
  // Get the GMTCConsumerMapStyleCoordinator
  let consumerMapStyleCoordinator = mapView.consumerMapStyleCoordinator

  // The polyline type that you would like to set custom UI options for.
  let customizablePolylineType = GMTCPolylineType.activeRoute

  // Initializing polyline options with default values (immutable version).
  let polylineStyleOptions = GMTCPolylineStyleOptions()
  consumerMapStyleCoordinator.setPolylineStyleOptions(
    polylineStyleOptions, polylineType: customizablePolylineType)

  // Initializing polyline options with custom values (mutable version).
  let mutablePolylineStyleOptions = GMTCMutablePolylineStyleOptions()
  mutablePolylineStyleOptions.isVisible = true
  mutablepolylineStyleOptions.strokeWidth = 8.0
  mutablepolylineStyleOptions.strokeColor = .blue
  mutablepolylineStyleOptions.zIndex = 1000
  mutablepolylineStyleOptions.isGeodesic = true
  mutablePolylineStyleOptions.isTrafficEnabled = true
  mutablePolylineStyleOptions.setTrafficColorFor(.slow, color: .yellow)
  mutablePolylineStyleOptions.setTrafficColorFor(.trafficJam, color: .purple)
  consumerMapStyleCoordinator.setPolylineStyleOptions(
    mutablePolylineStyleOptions, polylineType: customizablePolylineType)

  // Reset polyline options to default values.
  consumerMapStyleCoordinator.setPolylineStyleOptions(
    nil, polylineType: customizablePolylineType)
}

/** MapViewController.m */

- (void)updatePolylineUIOptions {
  // Get the GMTCConsumerMapStyleCoordinator
  GMTCConsumerMapStyleCoordinator *consumerMapStyleCoordinator = [_mapView consumerMapStyleCoordinator];

  // The polyline type that you would like to set custom UI options for.
  GMTCPolylineType customizablePolylineType = GMTCPolylineTypeActiveRoute;

  // Initializing polyline options with default values (immutable version).
  GMTCPolylineStyleOptions *polylineStyleOptions = [[GMTCPolylineStyleOptions alloc] init];
  [consumerMapStyleCoordinator setPolylineStyleOptions:polylineStyleOptions
                               polylineType:customizablePolylineType];

  // Initializing polyline options with custom values (mutable version).
  GMTCMutablePolylineStyleOptions *mutablePolylineStyleOptions = [[GMTCMutablePolylineStyleOptions alloc] init];
  mutablePolylineStyleOptions.isVisible = YES;
  mutablepolylineStyleOptions.strokeWidth = 8.0;
  mutablepolylineStyleOptions.strokeColor = [UIColor blueColor];
  mutablepolylineStyleOptions.zIndex = 1000;
  mutablepolylineStyleOptions.isGeodesic = YES;
  mutablePolylineStyleOptions.isTrafficEnabled = YES;
  [mutablePolylineStyleOptions setTrafficColorForSpeed:GMTSSpeedTypeSlow color:[UIColor yellowColor]];
  [mutablePolylineStyleOptions setTrafficColorForSpeed:GMTSSpeedTypeTrafficJam color:[UIColor purpleColor]];
  [consumerMapStyleCoordinator setPolylineStyleOptions:mutablePolylineStyleOptions
                                          polylineType:customizablePolylineType];

  // Reset polyline options to default values.
  [consumerMapStyleCoordinator setPolylineStyleOptions:nil
                                          polylineType:customizablePolylineType];
}

Traffic-aware polylines

The traffic layer of the polyline is disabled by default. When you enable it by using polylineStyleOptions.isTrafficEnabled = true, segments representing stretches of non-normal traffic are drawn as the route.

Traffic conditions are represented as one of four speeds:

• GMTSSpeedType.noData
• GMTSSpeedType.normal
• GMTSSpeedType.slow
• GMTSSpeedType.trafficJam

You can customize the color representing each of those speed classifications by using setTrafficColorFor(_:color:).