How to iterate over the path from Google Directions API? - ios

Question

I am trying to move the marker along two selected markers with their coordinates set.
I am getting the path from this code:
GMSPath *path1 =[GMSPath pathFromEncodedPath:self.dataReceive[#"routes"][0][#"overview_polyline"][#"points"]];
When i am using the for loop to move first marker to the position of second marker. It is taking a straight path but it should move along the path coordinates that has been fetched from the google directions API.
for (int i = 0; i< path1.count; i++) {
CLLocationCoordinate2D position = [path1 coordinateAtIndex:i];
[CATransaction begin];
[CATransaction setAnimationDuration:50];
self.marker.position = position;
self.marker.map = self.mapView;
[CATransaction commit];
}
Thanks.

Answer 1

Try this code Objective C.
- (void)showPathFromCurrentLocationForCoordinate:(CLLocationCoordinate2D)coord{
CLLocationCoordinate2D destination = coord;
NSMutableString *urlString = [[NSMutableString alloc] initWithString:#"https://maps.googleapis.com/maps/api/directions/json?"];
[urlString appendString:[NSString stringWithFormat:#"origin=%f,%f&destination=%f,%f&sensor=true",self.deviceLocation.latitude,self.deviceLocation.longitude,destination.latitude,destination.longitude]];
[RestApi getPath:urlString withParameter:nil withHandler:^(id responseObject, NSError *error, NSURLResponse *response) {
dispatch_async(dispatch_get_main_queue(), ^{
if (error == nil) {
NSDictionary *json = responseObject;
NSArray *routes = [json objectForKey:#"routes"];
if (routes != nil && routes.count > 0) {
NSDictionary *route = [routes objectAtIndex:0];
long distance = 0;
NSArray *legs = [route objectForKey:#"legs"];
for (NSDictionary *leg in legs) {
long dist = [leg[#"distance"][#"value"] longValue];
distance = distance + dist;
}
GMSPath *path =[GMSPath pathFromEncodedPath:route[#"overview_polyline"][#"points"]];
GMSPolyline *line = [GMSPolyline polylineWithPath:path];
line.strokeColor = PATH_STROKE_COLOR;
line.strokeWidth = PATH_STROKE_WIDTH;
line.map = mapView;
GMSMutablePath *markerpath = [GMSMutablePath path];
[markerpath addCoordinate: self.deviceLocation];
[markerpath addCoordinate: marker.position];
GMSCoordinateBounds *bonds = [[GMSCoordinateBounds alloc] initWithPath:markerpath];
[CATransaction begin];
[CATransaction setValue:[NSNumber numberWithFloat: 1.0] forKey:kCATransactionAnimationDuration];
[mapView animateWithCameraUpdate:[GMSCameraUpdate fitBounds:bonds withPadding:MAP_BOUNDS_OFFSET_PADDING]];
[CATransaction commit];
}
else{
NSLog(#"Google direction API failed.");
}
}
else if (error != nil){
NSLog(#"%#",error.localizedDescription);
}
});
}];
}