Question

我尝试使用谷歌地图显示从当前位置到目的地的路线，但我想显示从移动物体到我当前位置的路线？

Answer 1

我希望您可以通过以下网址找到实现功能的方法

http://code4app.net/category/mapview

Answer 2

使用类似

的nvpolyline

（MKAnnotationView *）mapView：（MKMapView *）mapView viewForAnnotation：（id）annotation {

if（[注释isKindOfClass：[NVPolylineAnnotation class]]）{
```
return [[[NVPolylineAnnotationView alloc] initWithAnnotation:annotation mapView:map] autorelease];
```
}

返回零; }

（void）mapView：（MKMapView *）mapView didAddAnnotationViews：（NSArray *）views {

//修复了某些标记位于折线后面的问题 if（[Appdelegate.CrashUserArray count]＆gt; 0） {

for（int i = 0; i＆lt; [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]＆gt; 0） { spark.userdetailarray = [[NSMutableArray alloc] init]; spark.userdetailarray = [Appdelegate.CrashUserDetailArray objectAtIndex：0];

}

[self.navigationController pushViewController：spark animated：NO]; [火花释放]; }
（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地区; 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经度：-73.7396] autorelease]， [[[CLLocation alloc] initWithLatitude：45.44628经度：-73.74119] autorelease]， [[[CLLocation alloc] initWithLatitude：45.44649经度：-73.74106999999999] autorelease]， [[[CLLocation alloc] initWithLatitude：45.44665999999999经度：-73.7409] autorelease]， [[[CLLocation alloc] initWithLatitude：45.44665999999999经度：-73.7409] autorelease]， [[[CLLocation alloc] initWithLatitude：45.44676经度：-73.74073] autorelease]， [[[CLLocation alloc] initWithLatitude：45.44707999999999经度：-73.73990000000001] autorelease]， [[[CLLocation alloc] initWithLatitude：45.44748经度：-73.73856000000001] autorelease]， [[[CLLocation alloc] initWithLatitude：45.44748经度：-73.73856000000001] autorelease]， [[[CLLocation alloc] initWithLatitude：45.44834经度：-73.73581] autorelease]， [[[CLLocation alloc] initWithLatitude：45.44857999999999经度：-73.73475999999999] autorelease]， [[[CLLocation alloc] initWithLatitude：45.44863000000001经度：-73.73417000000001] autorelease]， [[[CLLocation alloc] initWithLatitude：45.44863000000001经度：-73.73300999999999] autorelease]， [[[CLLocation alloc] initWithLatitude：45.44795经度：-73.7008] autorelease]， [[[CLLocation alloc] initWithLatitude：45.44784经度：-73.69398] autorelease]， [[[CLLocation alloc] initWithLatitude：45.44775经度：-73.69092000000001] autorelease]， [[[CLLocation alloc] initWithLatitude：45.44743999999999经度：-73.68584] autorelease]， [[[CLLocation alloc] initWithLatitude：45.44728经度：-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");
```
} }

通过此方法，您可以在地图上绘制路径

显示从当前位置到移动目的地的路线

2 个答案: