objective c - Move the annotation on Map like Uber iOS application

Question

I am working on a project where I need to create a similar iOS application to UBER and OLA where the car is moving based on the location. I'm looking for some kind of Library which can make Cars move and take turns smoothly just like OLA. For now, I was able to move the car from one latitude-longitude to another. But the complex part is how to turn and make sure the car face to the front when moving to the direction.

Please find the below screenshot for the same.

Answer 1

Actually I had also one requirement in my previous iOS application, so please find the below URL for download the code and review it.

Environment: Xcode 11 and Swift 5

Link: https://github.com/ram2386/Track-Car

Highlight of the code in which I had done it.

For accomplished the functionality for moving the car the same as Uber iOS application, you need to first calculate the angle between old location and new location. Please find the below code for how to calculate it.

func angleFromCoordinate(firstCoordinate: CLLocationCoordinate2D, 
    secondCoordinate: CLLocationCoordinate2D) -> Double {

    let deltaLongitude: Double = secondCoordinate.longitude - firstCoordinate.longitude
    let deltaLatitude: Double = secondCoordinate.latitude - firstCoordinate.latitude
    let angle = (Double.pi * 0.5) - atan(deltaLatitude / deltaLongitude)

    if (deltaLongitude > 0) {
        return angle
    } else if (deltaLongitude < 0) {
        return angle + Double.pi
    } else if (deltaLatitude < 0) {
        return Double.pi
    } else {
        return 0.0
    }
}

//Apply the angle to the particular annotation for moving
let getAngle = angleFromCoordinate(firstCoordinate: oldLocation, secondCoordinate: newLocation)

//Apply the new location for coordinate
myAnnotation.coordinate = newLocation;

//Getting the MKAnnotationView
let annotationView = self.mapView.view(for: myAnnotation)

//Angle for moving the car
annotationView?.transform = CGAffineTransform(rotationAngle: CGFloat(getAngle))

Link for iOS Map (Objective-C): https://www.dropbox.com/s/4jj8em1o786qa9j/TestAnnotationMoving.zip?dl=0

---

For Google Map

Link for google Map: https://www.dropbox.com/s/a5ts108lh5rr1gd/GoogleMap.zip?dl=0

How to run the project?

1. Download the project from the above dropbox link.
2. Get the MapsAPIKey from the link.
3. Run the cocoa pods to install the google map SDK for iOS.

Create the object of GMSMarker.

GMSMarker *marker = [[GMSMarker alloc] init];
marker.position = CLLocationCoordinate2DMake(kCameraLatitude, kCameraLongitude);
marker.map = _mapView;
marker.icon = [UIImage imageNamed:@"carIcon"];

Get the angle between two locations and apply them for calculating the angle please use the above function.

//Get the angle
float getAngle = [self angleFromCoordinate:oldLocation toCoordinate:newLocation];

//Apply the new coordinate
marker.position = newLocation;

//Apply the angle and convert to degree from radian.
marker.rotation = getAngle * (180.0 / M_PI);

As in apple map .transform take radian but in google map .rotation takes degree.

Please find the below GIF representation, how it looks on the map.

For accomplished the functionality, I had created the .csv file where I had added 1000 records of latitude and longitude.

Note: You get the angle based on the location, so sometimes it happens you does not get the proper angle due to location as it totally depends on your location.

I hope it works for you!!!