显示从当前位置到移动汽车目的地的路线答案

【问题标题】：to show route from current location to moving car destination显示从当前位置到移动汽车目的地的路线
【发布时间】：2013-10-08 07:27:50
【问题描述】：

我尝试使用 Google 地图显示从当前位置到目的地的路线，但我想显示从移动对象到我当前位置的路线？

【问题讨论】：

标签： iphone objective-c google-maps gps

【解决方案1】：

我希望你能从下面的 URL 中找到一种方法来实现你的功能

http://code4app.net/category/mapview

【讨论】：

【解决方案2】：

使用 nvpolyline 之类的东西

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

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

返回零； }

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

// 修复某些标记位于折线后面 if ([Appdelegate.CrashUserArray 计数] > 0) {

for (int i = 0; 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]; [火花释放]； }
(void)mapView:(MKMapView *)mapView regionDidChangeAnimated:(BOOL)animated {

NSString *reqSysVer = @"4.0"; NSString *currSysVer = [[UIDevice currentDevice] systemVersion]; 如果（[currSysVer 比较：reqSysVer 选项：NSNumericSearch] ！= NSOrderedAscending）{ [自我更新PolylineAnnotationView]; } }
(void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)annotationView didChangeDragState:(MKAnnotationViewDragState)newState fromOldState:(MKAnnotationViewDragState)oldState {

if([annotationView isKindOfClass:[RegionAnnotationView 类]]) {
```
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 区域； MKCoordinateSpan 跨度； span.latitudeDelta = 0.005; span.longitudeDelta = 0.005;

oldlocation.latitude = aUserLocation.coordinate.latitude; oldlocation.longitude = aUserLocation.coordinate.longitude; region.span = 跨度； 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 经度：-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 经度：-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");
```
} }

通过这种方法可以在地图上绘制路径

【讨论】：