Now that you've initialized the map view, here's how to implement a delegate
to handle map view event changes as the vehicle progresses along its journey.
Swift
funcmapViewDidInitialize(_mapview:GMTCMapView){// Handle the update to the state of the map view to browsing.}funcmapView(_mapView:GMSMapView,didTapConsumerMarkermapMarker:GMSMarker,markerType:GMTCMapViewMarkerType)->Bool{// Handle the mapView marker was tapped.}
Objective-C
/** MapViewController.m*/#pragma mark - GMTCMapViewDelegate implementation// Handle state update of map view.-(void)mapViewDidInitializeCustomerState:(GMTCMapView*)mapview{// Handle the update to the state of the map view to browsing.}-(void)mapView:(GMSMapView*)mapViewdidTapConsumerMarker:(nonnullGMSMarker*)mapMarkermarkerType:(GMTCMapViewMarkerType)markerType{// Handle the mapView marker was tapped.}
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-09-04 UTC."],[[["\u003cp\u003eThis documentation outlines how to set up and use the Google Maps SDK for iOS to track and display trips in real-time within your application.\u003c/p\u003e\n"],["\u003cp\u003eThe guide covers initializing the map view, enabling user location, and handling events like the map becoming ready and marker taps.\u003c/p\u003e\n"],["\u003cp\u003eYou can customize the appearance of the map using styling options provided by the SDK, as well as follow a vehicle's trip progression with built-in features.\u003c/p\u003e\n"]]],["This content details how to set up a map to follow a trip in iOS. The process involves two key steps: first, initializing the map view (`GMTCMapView`) within a view controller, as demonstrated in Swift and Objective-C code examples. Second, implementing a delegate to handle map view events, which includes managing state updates and responding to marker taps. Customization of the map's style and the process to follow a trip are suggested as next steps.\n"],null,["Select platform: [Android](/maps/documentation/mobility/journey-sharing/on-demand/android/create-ui \"View this page for the Android platform docs.\") [iOS](/maps/documentation/mobility/journey-sharing/on-demand/ios/create-ui \"View this page for the iOS platform docs.\")\n\n\u003cbr /\u003e\n\nTo set up a map to follow a trip in iOS, complete the following steps:\n\n1. [Initialize the map view](#map-view)\n2. [Handle map events](#handle-updates)\n\n| **Note:** After you initialize the map view, you can customize the map. For more details, see [Style a map](/maps/documentation/mobility/journey-sharing/on-demand/ios/style).\n\nStep 1: Initialize the map view\n\nTo follow a trip, you must initialize a map view.\n\nThe following example shows how to initialize `GMTCMapView`. \n\nSwift \n\n /*\n * MapViewController.swift\n */\n class ViewController: UIViewController, GMTCMapViewDelegate {\n private var rideSharingMap: GMTCMapView?\n\n override func viewDidLoad() {\n super.viewDidLoad()\n\n self.rideSharingMap = GMTCMapView(frame: UIScreen.main.bounds)\n self.rideSharingMap.delegate = self\n self.rideSharingMap?.settings.myLocationButton = true\n self.view.addSubview(self.rideSharingMap!)\n ...\n }\n }\n\nObjective-C \n\n /*\n * MapViewController.h\n */\n @interface MapViewController : UIViewController\u003cGMTCMapViewDelegate\u003e\n ...\n @end\n\n /*\n * MapViewController.m\n */\n @implementation MapViewController\n\n - (void)viewDidLoad {\n [super viewDidLoad];\n ...\n self.mapView = [[GMTCMapView alloc] initWithFrame:CGRectZero];\n self.mapView.settings.myLocationButton = YES;\n self.mapView.delegate = self;\n ...\n }\n\n ...\n\n @end\n\nStep 2: Handle map view events\n\nNow that you've initialized the map view, here's how to implement a delegate\nto handle map view event changes as the vehicle progresses along its journey. \n\nSwift \n\n func mapViewDidInitialize(_ mapview: GMTCMapView) {\n // Handle the update to the state of the map view to browsing.\n }\n\n func mapView(_ mapView: GMSMapView, didTapConsumerMarker mapMarker: GMSMarker, markerType: GMTCMapViewMarkerType) -\u003e Bool {\n // Handle the mapView marker was tapped.\n }\n\nObjective-C \n\n /*\n * MapViewController.m\n */\n #pragma mark - GMTCMapViewDelegate implementation\n\n // Handle state update of map view.\n - (void)mapViewDidInitializeCustomerState:(GMTCMapView *)mapview {\n // Handle the update to the state of the map view to browsing.\n }\n\n - (void)mapView:(GMSMapView *)mapView\n didTapConsumerMarker:(nonnull GMSMarker *)mapMarker\n markerType:(GMTCMapViewMarkerType)markerType {\n // Handle the mapView marker was tapped.\n }\n\nWhat's next\n\n- [Style a map](/maps/documentation/mobility/journey-sharing/on-demand/ios/style)\n- [Follow a trip in iOS](/maps/documentation/mobility/journey-sharing/on-demand/ios/share-journey)"]]
