What is proper way to get ETA (estimated time arrival) from any location to my current location

问题

Would like to know what is proper way to get ETA (estimated time arrival) from any location to my current location, in consideration the following situation:

a. ex. - I got from another device its location (lon/lat) and want to when the other person will pick me up... In this case what web-service can I use to get this info for the user? Does mapkit provides that kind of option?

b. In case it will be done on the server-side and I'll just send my user location, what are the tools my server-side programmer can use to get ETA info in order to send it back to my user?

Thank you all in advance.

I saw this: Is there any way to determine the driving time between two locations using Apple's Maps API? - the problem, as I found in other places, (to my understanding)is that google api requires use of Google Maps app that isn't installed on every iOS user now.

回答1:

I know this post is a bit old but in case someone is looking at the answer since iOS 7 Apple provide an API in MapKit in order to calculate all these info.

Here is a snippet of how to use this API

    MKDirectionsRequest *request = [[MKDirectionsRequest alloc] init];
    [request setSource:[MKMapItem mapItemForCurrentLocation]];
    [request setDestination:destination];
    [request setTransportType:MKDirectionsTransportTypeAutomobile];
    [request setRequestsAlternateRoutes:NO];
    MKDirections *directions = [[MKDirections alloc] initWithRequest:request];
    [directions calculateDirectionsWithCompletionHandler:^(MKDirectionsResponse *response, NSError *error) {
        if ( ! error && [response routes] > 0) {
            MKRoute *route = [[response routes] objectAtIndex:0];
            //route.distance  = The distance
            //route.expectedTravelTime = The ETA
        }
    }];

回答2:

This worked for me using route.distance from M to the K's answer I was modifying code from this tutorial map directions tutorial

(IBAction)routeButtonPressed:(UIBarButtonItem *)sender {
    MKDirectionsRequest *directionsRequest = [[MKDirectionsRequest alloc] init];
    MKPlacemark *placemark = [[MKPlacemark alloc] initWithPlacemark:thePlacemark];
    [directionsRequest setSource:[MKMapItem mapItemForCurrentLocation]];
    [directionsRequest setDestination:[[MKMapItem alloc] initWithPlacemark:placemark]];
    directionsRequest.transportType = MKDirectionsTransportTypeAutomobile;
    MKDirections *directions = [[MKDirections alloc] initWithRequest:directionsRequest];
    [directions calculateDirectionsWithCompletionHandler:^(MKDirectionsResponse *response, NSError *error) {
        if (error) {
            NSLog(@"Error %@", error.description);
        } else {
            routeDetails = response.routes.lastObject;
            [self.mapView addOverlay:routeDetails.polyline];
            self.destinationLabel.text = [placemark.addressDictionary objectForKey:@"Street"];
            self.distanceLabel.text = [NSString stringWithFormat:@"%0.1f Miles", routeDetails.distance/1609.344];

            self.etaLabel.text = [NSString stringWithFormat:@"%0.1f minutes",routeDetails.expectedTravelTime/60];

            //self.transportLabel.text = [NSString stringWithFormat:@"%u" ,routeDetails.transportType];
            self.allSteps = @"";
            for (int i = 0; i < routeDetails.steps.count; i++) {
                MKRouteStep *step = [routeDetails.steps objectAtIndex:i];
                NSString *newStep = step.instructions;
                self.allSteps = [self.allSteps stringByAppendingString:newStep];
                self.allSteps = [self.allSteps stringByAppendingString:@"\n\n"];
                self.steps.text = self.allSteps;


            }
        }

    }];
}

来源：https://stackoverflow.com/questions/18578116/what-is-proper-way-to-get-eta-estimated-time-arrival-from-any-location-to-my-c

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ios

objective-c

google-maps

map

mapkit