to show route from current location to moving car destination - iphone

Question

I am tried showing route from current location to destination using Google map but i want to show route from moving object to my current location?

Answer 1

I hope you can find a way to implement your functionality from following URL
http://code4app.net/category/mapview

Answer 2

use nvpolyline something like
(MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id )annotation {
if ([annotation isKindOfClass:[NVPolylineAnnotation class]]) {
return [[[NVPolylineAnnotationView alloc] initWithAnnotation:annotation mapView:map] autorelease];
}
return nil;
}
(void) mapView:(MKMapView *)mapView didAddAnnotationViews:(NSArray *)views {
// fixes that some marker are behind the polyline
if ([Appdelegate.CrashUserArray count] > 0)
{
for (int i = 0; i < [Appdelegate.CrashUserArray count]; i ++)
{
for (int j = 0; j < [views count]; j++) {
MKAnnotationView *view = [views objectAtIndex:j];
if ([view isKindOfClass:[NVPolylineAnnotationView class]])
{
[[view superview] sendSubviewToBack:view];
//view.image=[UIImage imageNamed:#"close_button.png"];
NSString *reqSysVer = #"4.0";
NSString *currSysVer = [[UIDevice currentDevice] systemVersion];
if ([currSysVer compare:reqSysVer options:NSNumericSearch] != NSOrderedAscending)
{
[self updatePolylineAnnotationView];
}
}
else {
if ([[Appdelegate.CrashUserArray objectAtIndex:i] count] > 0) {
nextviewbtn=[[UIButton alloc]init];
nextviewbtn.frame=CGRectMake(10,10,13,22);
[nextviewbtn addTarget:self action:#selector(OpenUser:) forControlEvents:UIControlEventTouchUpInside];
nextviewbtn.tag=i;
[nextviewbtn setBackgroundImage:[UIImage imageNamed:#"right_arrow.png"] forState:UIControlStateNormal];
dispatch_async(dispatch_get_global_queue(0,0), ^{
NSData * data = [[NSData alloc] initWithContentsOfURL: [NSURL URLWithString: [[[Appdelegate.CrashUserArray objectAtIndex:i]objectAtIndex:0] objectForKey:#"userphoto_47"]]];
if ( data == nil )
return;
dispatch_async(dispatch_get_main_queue(), ^{
view.image = [UIImage imageWithData: data];
view.rightCalloutAccessoryView=nextviewbtn;
});
[data release];
});
}
}
}
}
}
[mapView setShowsUserLocation:NO];
}
(void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control
{
SparkFromMapViewController *spark=[[SparkFromMapViewController alloc]initWithNibName:#"SparkFromMapViewController" bundle:nil];
if ([[Appdelegate.CrashUserDetailArray objectAtIndex:0] count] > 0)
{
spark.userdetailarray=[[NSMutableArray alloc] init];
spark.userdetailarray=[Appdelegate.CrashUserDetailArray objectAtIndex:0];
}
[self.navigationController pushViewController:spark animated:NO];
[spark release];
}
(void)mapView:(MKMapView *)mapView regionDidChangeAnimated:(BOOL)animated {
NSString *reqSysVer = #"4.0";
NSString *currSysVer = [[UIDevice currentDevice] systemVersion];
if ([currSysVer compare:reqSysVer options:NSNumericSearch] != NSOrderedAscending) {
[self updatePolylineAnnotationView];
}
}
(void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)annotationView didChangeDragState:(MKAnnotationViewDragState)newState fromOldState:(MKAnnotationViewDragState)oldState {
if([annotationView isKindOfClass:[RegionAnnotationView class]]) {
RegionAnnotationView *regionView = (RegionAnnotationView *)annotationView;
RegionAnnotation *regionAnnotation = (RegionAnnotation *)regionView.annotation;
if (newState == MKAnnotationViewDragStateStarting) {
[regionView removeRadiusOverlay];
[locationmanager stopMonitoringForRegion:regionAnnotation.region];
}
if (oldState == MKAnnotationViewDragStateDragging && newState == MKAnnotationViewDragStateEnding) {
[regionView updateRadiusOverlay];
NSUserDefaults *def=[NSUserDefaults standardUserDefaults];
CLRegion *newRegion = [[CLRegion alloc] initCircularRegionWithCenter:regionAnnotation.coordinate radius:1000.0 identifier:[NSString stringWithFormat:#"%f, %f", [def floatForKey:#"currentlati"],[def floatForKey:#"currentlongi"]]];
regionAnnotation.region = newRegion;
// [locationmanager startMonitoringForRegion:regionAnnotation.region desiredAccuracy:kCLLocationAccuracyBest];
}
}
}
-(void)mapView:(MKMapView *)aMapView didUpdateUserLocation:(MKUserLocation *)aUserLocation {
MKCoordinateRegion region;
MKCoordinateSpan span;
span.latitudeDelta = 0.005;
span.longitudeDelta = 0.005;
oldlocation.latitude = aUserLocation.coordinate.latitude;
oldlocation.longitude = aUserLocation.coordinate.longitude;
region.span = span;
region.center = oldlocation;
NSArray *points = [NSArray arrayWithObjects:
[[[CLLocation alloc] initWithLatitude:45.43894 longitude:-73.7396] autorelease],
[[[CLLocation alloc] initWithLatitude:45.44628 longitude:-73.74119] autorelease],
[[[CLLocation alloc] initWithLatitude:45.44649 longitude:-73.74106999999999] autorelease],
[[[CLLocation alloc] initWithLatitude:45.44665999999999 longitude:-73.7409] autorelease],
[[[CLLocation alloc] initWithLatitude:45.44665999999999 longitude:-73.7409] autorelease],
[[[CLLocation alloc] initWithLatitude:45.44676 longitude:-73.74073] autorelease],
[[[CLLocation alloc] initWithLatitude:45.44707999999999 longitude:-73.73990000000001] autorelease],
[[[CLLocation alloc] initWithLatitude:45.44748 longitude:-73.73856000000001] autorelease],
[[[CLLocation alloc] initWithLatitude:45.44748 longitude:-73.73856000000001] autorelease],
[[[CLLocation alloc] initWithLatitude:45.44834 longitude:-73.73581] autorelease],
[[[CLLocation alloc] initWithLatitude:45.44857999999999 longitude:-73.73475999999999] autorelease],
[[[CLLocation alloc] initWithLatitude:45.44863000000001 longitude:-73.73417000000001] autorelease],
[[[CLLocation alloc] initWithLatitude:45.44863000000001 longitude:-73.73300999999999] autorelease],
[[[CLLocation alloc] initWithLatitude:45.44795 longitude:-73.7008] autorelease],
[[[CLLocation alloc] initWithLatitude:45.44784 longitude:-73.69398] autorelease],
[[[CLLocation alloc] initWithLatitude:45.44775 longitude:-73.69092000000001] autorelease],
[[[CLLocation alloc] initWithLatitude:45.44743999999999 longitude:-73.68584] autorelease],
[[[CLLocation alloc] initWithLatitude:45.44728 longitude:-73.68165999999999] autorelease],
[[[CLLocation alloc] initWithLatitude:45.48679000000001 longitude:-73.59443] autorelease],
nil];
NVPolylineAnnotation *annotation = [[[NVPolylineAnnotation alloc] initWithPoints:points mapView:map] autorelease];
[map addAnnotation:annotation];
[loc release];
[aMapView setRegion:region animated:YES];
NSLog(#"uncomment this when you want to upload record");
}
}
by this method you can draw path on map