如何获取谷歌地图等位置，以显示位置之间的确切路径。因为它显示直线直线，它不包含两个地方之间的任何路径，也没有显示它通过的位置。 我使用了以下代码：
CLLocationCoordinate2D coordinateArray[2];
coordinateArray[0] = CLLocationCoordinate2DMake(51.5074, 0.1278);
coordinateArray[1] = CLLocationCoordinate2DMake(48.8566, 2.3522);
self.routeLine = [MKPolyline polylineWithCoordinates:coordinateArray count:2];
[self.mapView setVisibleMapRect:[self.routeLine boundingMapRect]]; //If you want the route to be visible
[self.mapView addOverlay:self.routeLine];
用于连接这两个路径的代码已经实现。
-(MKOverlayView *)mapView:(MKMapView *)mapView viewForOverlay:(id<MKOverlay>)overlay
{
if(overlay == self.routeLine)
{
if(nil == self.routeLineView)
{
self.routeLineView = [[MKPolylineView alloc] initWithPolyline:self.routeLine];
self.routeLineView.fillColor = [UIColor redColor];
self.routeLineView.strokeColor = [UIColor redColor];
self.routeLineView.lineWidth = 5;
}
return self.routeLineView;
}
return nil;
}
答案 0 :(得分：0)
试一下我的代码：
- (void)drawRouteFromLocation:(LocationPin *)source toLocation:(LocationPin *)destination
{
[self removeCurrentRouteDrawing];
MKPlacemark *sourcePlaceMark = [[MKPlacemark alloc]initWithCoordinate:source.actualCoordinate addressDictionary:nil];
MKPlacemark *destinationPlaceMark = [[MKPlacemark alloc]initWithCoordinate:destination.actualCoordinate addressDictionary:nil];
MKDirectionsRequest *request = [[MKDirectionsRequest alloc] init];
request.source = [[MKMapItem alloc] initWithPlacemark:sourcePlaceMark];
request.destination = [[MKMapItem alloc] initWithPlacemark:destinationPlaceMark];
request.requestsAlternateRoutes = NO;
MKDirections *directions = [[MKDirections alloc] initWithRequest:request];
[directions calculateDirectionsWithCompletionHandler:
^(MKDirectionsResponse *response, NSError *error) {
if (error)
{
// Handle Error
}
else
{
[self showRoute:response];
}
}];
}
-(void)showRoute:(MKDirectionsResponse *)response
{
for (MKRoute *route in response.routes)
{
[self.mkMapView addOverlay:route.polyline level:MKOverlayLevelAboveRoads];
// for (MKRouteStep *step in route.steps)
// {
// DEBUG_LOG(@"%@", step.instructions);
// }
}
}
#pragma mark - MKMapViewDelegate
- (void)mapView:(MKMapView *)mapView regionWillChangeAnimated:(BOOL)animated
{
// DEBUG_LOG(@"region Will Change");
if ([self.delegate respondsToSelector:@selector(mapView:regionWillChangeAnimated:)])
{
[self.delegate mapView:mapView regionWillChangeAnimated:animated];
}
}
- (void)mapView:(MKMapView *)mapView regionDidChangeAnimated:(BOOL)animated
{
// DEBUG_LOG(@"region Did Change");
if ([self.delegate respondsToSelector:@selector(mapView:regionDidChangeAnimated:)])
{
[self.delegate mapView:mapView regionDidChangeAnimated:animated];
}
}
- (void)mapViewDidFinishLoadingMap:(MKMapView *)mapView
{
DEBUG_LOG(@"mapView Did Finish Loading Map");
self.mapInitialized = YES;
if ([self.delegate respondsToSelector:@selector(mapViewDidFinishLoadingMap:)])
{
[self.delegate mapViewDidFinishLoadingMap:mapView];
}
}
//- (MKOverlayView *)mapView:(MKMapView *)mapView viewForOverlay:(id <MKOverlay>)overlay
//{
// if ([overlay isKindOfClass: [MKPolyline class]])
// {
// // This is for a dummy overlay to work around a problem with overlays
// // not getting removed by the map view even though we asked for it to
// // be removed.
// MKOverlayView * dummyView = [[MKOverlayView alloc] init];
// dummyView.alpha = 0.0;
// return dummyView;
// }
// else
// {
// return nil;
// }
//}
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation
{
if ([self.delegate respondsToSelector:@selector(mapView:viewForAnnotation:)])
{
return [self.delegate mapView:mapView viewForAnnotation:annotation];
}
return nil;
}
- (MKOverlayRenderer *)mapView:(MKMapView *)mapView rendererForOverlay:(id < MKOverlay >)overlay
{
if ([overlay isKindOfClass:[MKPolyline class]])
{
MKPolylineRenderer *renderer = [[ MKPolylineRenderer alloc]initWithOverlay:overlay];
renderer.lineWidth = 10;
renderer.strokeColor = [UIColor colorWithRed:0.0 green:122.0/255.0 blue:1.0 alpha:1.0];
[self _zoomToPolyLine:self.mkMapView polyLine:overlay animated:YES];
return renderer;
}
else
{
return nil;
}
}
#pragma mark - Utils
-(void)_zoomToPolyLine:(MKMapView*)map polyLine:(MKPolyline*)polyLine animated:(BOOL)animated
{
// MKPolygon* polygon =
// [MKPolygon polygonWithPoints:polyLine.points count:polyLine.pointCount];
//
// [self.mkMapView setRegion:MKCoordinateRegionForMapRect([polygon boundingMapRect])
// animated:animated];
[map setVisibleMapRect:[polyLine boundingMapRect] edgePadding:UIEdgeInsetsMake(35.0, 35.0, 35.0, 35.0) animated:animated];
}
- (void)removeCurrentRouteDrawing
{
if (self.mkMapView.overlays.count)
{
[self.mkMapView removeOverlays:self.mkMapView.overlays];
}
}
答案 1 :(得分：0)
ios中两个坐标之间的地图上的方向
- (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);
[self.mapview setVisibleMapRect:[polyline boundingMapRect]];
[self.mapview addOverlay:polyline];
return polyline;
}
- (MKPolylineRenderer *)mapView:(MKMapView *)mapView viewForOverlay:(id <MKOverlay>)overlay
{
// create a polylineView using polyline overlay object
MKPolylineRenderer *polylineView = [[MKPolylineRenderer alloc] initWithPolyline:overlay];
// Custom polylineView
polylineView.strokeColor = [UIColor blueColor];
polylineView.lineWidth = 1.0;
polylineView.alpha = 0.9;
return polylineView;
}
- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation
{
self.mapview.centerCoordinate = userLocation.location.coordinate;
NSString *userCordinate=[NSString stringWithFormat:@"%f,%f",userLocation.location.coordinate.latitude,userLocation.location.coordinate.longitude];
NSString *apikey = [NSString stringWithFormat:@"https://maps.googleapis.com/maps/api/directions/json?origin=%@&destination=%@",cordinate1,cordinate2]; // your cordinates replace by cordinate1 & cordinate2
NSURL *url = [NSURL URLWithString:apikey];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
NSURLResponse *response;
NSError *error;
NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
NSString *responseString = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
if(!error)
{
NSData *data = [responseString dataUsingEncoding:NSUTF8StringEncoding];
NSDictionary *jsonResponse = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
NSArray *routesArray = [jsonResponse objectForKey:@"routes"];
// NSLog(@"route array %@",routesArray);
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];
[mapView addOverlay:line];
}
}
}