Not getting proper waypoints GoogleMap Api - ios

Question

i want to draw polyline using googleMap Api on MKMapView.
i am doing this way. Here is Code for it.
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
[manager.requestSerializer setCachePolicy:NSURLRequestReloadIgnoringLocalCacheData];
NSString *urlString =#"https://maps.googleapis.com/maps/api/directions/json";
NSString *origin = #"23.0061,72.5647";
NSString *dstinatin = #"23.03293,72.6284";
MKPointAnnotation *annotationEnd = [[MKPointAnnotation alloc] init];
[annotationEnd setCoordinate:CLLocationCoordinate2DMake(23.0293, 72.6284)];
[annotationEnd setTitle:#"Ending"]; //You can set the subtitle too
[self.mkMapView addAnnotation:annotationEnd];
NSDictionary *dictParameters = #{#"origin" : [NSString stringWithFormat:#"%#",origin], #"destination" : [NSString stringWithFormat:#"%#",dstinatin], #"mode" : #"driving", #"sensor" : #"true"};
[manager GET:urlString parameters:dictParameters success:^(AFHTTPRequestOperation *operation, id responseObject) {
NSArray *routesArray = [responseObject objectForKey:#"routes"];
if ([routesArray count] > 0)
{
NSDictionary *routeDict = [routesArray objectAtIndex:0];
NSDictionary *routeOverviewPolyline = [routeDict objectForKey:#"overview_polyline"];
NSString *points = [routeOverviewPolyline objectForKey:#"points"];
MKPolyline *line = [self polylineWithEncodedString:points];
[mkMapView addOverlay:line];
}
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(#"Error: %#", error);
}];
my decoding method is :
-(MKPolyline *)polylineWithEncodedString:(NSString *)encodedString
{
const char *bytes = [encodedString UTF8String];
NSUInteger length = [encodedString lengthOfBytesUsingEncoding:NSUTF8StringEncoding];
NSUInteger idx = 0;
NSUInteger count = length / 4;
CLLocationCoordinate2D *coords = calloc(count, sizeof(CLLocationCoordinate2D));
NSUInteger coordIdx = 0;
float latitude = 0;
float longitude = 0;
while (idx < length) {
char byte = 0;
int res = 0;
char shift = 0;
do {
byte = bytes[idx++] - 63;
res |= (byte & 0x1F) << shift;
shift += 5;
} while (byte >= 0x20);
float deltaLat = ((res & 1) ? ~(res >> 1) : (res >> 1));
latitude += deltaLat;
shift = 0;
res = 0;
do {
byte = bytes[idx++] - 0x3F;
res |= (byte & 0x1F) << shift;
shift += 5;
} while (byte >= 0x20);
float deltaLon = ((res & 1) ? ~(res >> 1) : (res >> 1));
longitude += deltaLon;
float finalLat = latitude * 1E-5;
float finalLon = longitude * 1E-5;
CLLocationCoordinate2D coord = CLLocationCoordinate2DMake(finalLat, finalLon);
coords[coordIdx++] = coord;
if (coordIdx == count) {
NSUInteger newCount = count + 10;
coords = realloc(coords, newCount * sizeof(CLLocationCoordinate2D));
count = newCount;
}
}
MKPolyline *polyline = [MKPolyline polylineWithCoordinates:coords count:coordIdx];
free(coords);
return polyline;
}
i think my coding is ok but i am not getting proper polyline. i am getting it as seen in screen shot. polyline's last end should be on my MKPointAnnotation. Sorry for my english. please help me.

Answer 1

The destination of the route:
23.03293,72.6284
//____^
isn't equal to the marker-position:
23.0293,72.6284