Ios 如何绘制从当前位置到在mapView中设置的注释接点的路径？

我已经创建了一个mapView（对不起，我将我的插座命名为mapKit而不是mapView）。我获取了我的当前位置，并手动将注释pin设置为某个位置。现在我需要的是，只要我点击注释引脚（请准确点击注释引脚，而不是calloutAccessoryButton），我就需要找到一条路径，可能使用polyPath从我的当前位置到注释引脚。不完全像一个方向，只是一个路径，多边形叠加。请查看我的代码并帮助我

- (void)viewDidLoad {
    [super viewDidLoad];

    locationManager = [[CLLocationManager alloc] init];
    [locationManager requestWhenInUseAuthorization];
    locationManager.desiredAccuracy = kCLLocationAccuracyBest;
    locationManager.delegate = self;  

    [locationManager startUpdatingLocation];

    MKPointAnnotation *myAnnotation = [[MKPointAnnotation alloc]init];

    CLLocationCoordinate2D pinCoordinate;
    pinCoordinate.latitude = 51.49795;
    pinCoordinate.longitude = -0.174056;
    myAnnotation.coordinate = pinCoordinate;
    myAnnotation.title = @"Matthews Pizza";
    myAnnotation.subtitle = @"Best Pizza in Town";
    [self.mapKit addAnnotation:myAnnotation];

//    myAnnotation.coordinate = CLLocationCoordinate2DMake(51.49795, -0.174056);

    // Do any additional setup after loading the view.
}
-(void)checkStatus{

    CLAuthorizationStatus status = [CLLocationManager authorizationStatus];

    if (status==kCLAuthorizationStatusNotDetermined) {
        NSLog(@"Not Determined");
    }

    if (status==kCLAuthorizationStatusDenied) {
        NSLog(@"Denied");

    }

    if (status==kCLAuthorizationStatusRestricted) {
        NSLog(@"Restricted");

    }

    if (status==kCLAuthorizationStatusAuthorizedAlways) {
        NSLog(@"Always Allowed");

    }

    if (status==kCLAuthorizationStatusAuthorizedWhenInUse) {
        NSLog(@"NWhen In Use Allowed");

    }

}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}
-(void)viewWillAppear:(BOOL)animated{
}
- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation
{

    MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(userLocation.coordinate, 800, 800);
    [self.mapKit setRegion:[self.mapKit regionThatFits:region] animated:YES];




}


#pragma mark - CLLocationManagerDelegate

- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error
{
    NSLog(@"didFailWithError: %@", error);
    UIAlertView *errorAlert = [[UIAlertView alloc]
                               initWithTitle:@"Error" message:@"Failed to Get Your Location" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
    [errorAlert show];
}

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
    NSLog(@"didUpdateToLocation: %@", newLocation);
    CLLocation *currentLocation = newLocation;

    if (currentLocation != nil) {
        NSLog(@"%@",[NSString stringWithFormat:@"%.8f", currentLocation.coordinate.longitude]);
        NSLog(@"%@",[NSString stringWithFormat:@"%.8f", currentLocation.coordinate.latitude]);

    }
}



- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
    // If it's the user location, just return nil.
    if ([annotation isKindOfClass:[MKUserLocation class]])
        return nil;

    // Handle any custom annotations.
    if ([annotation isKindOfClass:[MKPointAnnotation class]])
    {
        // Try to dequeue an existing pin view first.
        MKAnnotationView *pinView = (MKAnnotationView*)[mapView dequeueReusableAnnotationViewWithIdentifier:@"CustomPinAnnotationView"];
        if (!pinView)
        {
            // If an existing pin view was not available, create one.
            pinView = [[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@"CustomPinAnnotationView"];

            pinView.canShowCallout = YES;
            pinView.image = [UIImage imageNamed:@"ic_map"];
            pinView.calloutOffset = CGPointMake(0, 32);
            UIButton* rightButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
            pinView.rightCalloutAccessoryView = rightButton;
        } else {
            pinView.annotation = annotation;
        }
        return pinView;
    }
    return nil;
}


-(void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control {
    id <MKAnnotation> annotation = [view annotation];
    if ([annotation isKindOfClass:[MKPointAnnotation class]])
    {
        NSLog(@"Clicked Pizza Shop");
    }
    UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Disclosure Pressed" message:@"Click Cancel to Go Back" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"OK", nil];
    [alertView show];
}

-（void）viewDidLoad{
[超级视图下载]；
locationManager=[[CLLocationManager alloc]init]；
[locationManager请求使用授权]；
locationManager.desiredAccuracy=KCallocationAccuracyBest；
locationManager.delegate=self；
[locationManager startUpdatingLocation]；
MKPointAnnotation*myAnnotation=[[MKPointAnnotation alloc]init]；
CLLocationCoordinated2和pinCoordinate；
平坐标纬度=51.49795；
pinCoordinate.经度=-0.174056；
myAnnotation.coordinate=pinCoordinate；
myAnnotation.title=@“马修斯比萨饼”；
myAnnotation.subtitle=@“镇上最好的比萨饼”；
[self.mapKit addAnnotation:myAnnotation]；
//myAnnotation.Coordination=CLLocationCoordinate2DMake（51.49795，-0.174056）；
//加载视图后执行任何其他设置。
}
-（作废）检查状态{
CLAuthorizationStatus=[CLLocationManager授权状态]；
如果（状态==kCLAuthorizationStatusNotDetermined）{
NSLog（“未确定”）；
}
如果（状态==kCLAuthorizationStatusDenied）{
NSLog（@“拒绝”）；
}
如果（状态==kCLAuthorizationStatusRestricted）{
NSLog（@“受限”）；
}
如果（状态==KCLAuthorizationStatusAuthorizationDalways）{
NSLog（“始终允许”）；
}
如果（状态==kCLAuthorizationStatusAuthorizedWhenInUse）{
NSLog（@“允许使用时”）；
}
}
-（无效）未收到记忆警告{
[超级记忆警告]；
//处置所有可以重新创建的资源。
}
-（无效）视图将显示：（BOOL）动画{
}
-（void）mapView:（MKMapView*）mapView didUpdateUserLocation:（MKUserLocation*）userLocation
{
mkcoordinaereregion=mkcoordinaereregionmakewithdistance（userLocation.coordination，800800）；
[self.mapKit setRegion:[self.mapKit regionatfits:region]动画：是]；
}
#pragma标记-CLLocationManagerDelegate
-（无效）locationManager:（CLLocationManager*）manager错误：（N错误*）错误
{
NSLog（@“错误：%@”，错误）；
UIAlertView*errorAlert=[[UIAlertView alloc]
initWithTitle:@“错误”消息：@“无法获取您的位置”委托：nil cancelButtonTitle:@“确定”其他ButtonTitles:nil]；
[错误警报显示]；
}
-（void）locationManager:（CLLocationManager*）manager didUpdateToLocation:（CLLocation*）newLocation fromLocation:（CLLocation*）oldLocation
{
NSLog（@“didUpdateLocation:%@”，newLocation）；
CLLocation*currentLocation=newLocation；
如果（当前位置！=nil）{
NSLog（@“%@，[NSString stringWithFormat:@“%.8f”，currentLocation.coordinate.longitude]）；
NSLog（@“%@，[NSString stringWithFormat:@“%.8f”，currentLocation.coordinate.latitude]）；
}
}
-（MKAnnotationView*）地图视图：（MKMapView*）地图视图注释：（id）注释
{
//如果是用户位置，只需返回nil。
if（[annotation isKindOfClass:[MKUserLocation类]]）
返回零；
//处理任何自定义注释。
if（[annotation isKindOfClass:[MKPointAnnotation class]]）
{
//首先尝试将现有pin视图出列。
MKAnnotationView*pinView=（MKAnnotationView*）[mapView出列可重用AnnotationView，标识符：@“CustomPinAnnotationView”]；
如果（！pinView）
{
//如果现有接点视图不可用，请创建一个。
pinView=[[MKAnnotationView alloc]initWithAnnotation:annotation重用标识符：@“CustomPinAnnotationView”]；
pinView.canShowCallout=是；
pinView.image=[UIImage ImageName:@“ic_地图”]；
pinView.calloutOffset=CGPointMake（0,32）；
UIButton*rightButton=[UIButton Button类型：UIButtonTypedTailButton]；
pinView.rightCalloutAccessoryView=rightButton；
}否则{
pinView.annotation=注释；
}
返回pinView；
}
返回零；
}
-（无效）地图视图：（MKMapView*）地图视图注释视图：（MKAnnotationView*）视图调用访问控制点击：（UIControl*）控制{
id注释=[视图注释]；
if（[annotation isKindOfClass:[MKPointAnnotation class]]）
{
NSLog（@“点击比萨饼店”）；
}
UIAlertView*alertView=[[UIAlertView alloc]initWithTitle:@“已按下披露”消息：@“单击取消返回”委托：自取消按钮：@“取消”其他按钮：@“确定”，无]；
[警报视图显示]；
}

单击注释时，pin委托方法将调用

-(void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKAnnotationView *)view
{
    NSLog(@"Latitude: %f", view.annotation.coordinate.latitude);
    NSLog(@"Longitude: %f", view.annotation.coordinate.longitude);
    self.annotationViewCoordinate = view.annotation.coordinate;
    [self GetDirections:view.annotation.coordinate];
} 

用于绘制路径

 - (void)GetDirections:(CLLocationCoordinate2D)locationCoordinate
{
    MKPlacemark *aPlcSource = [[MKPlacemark alloc] initWithCoordinate:self.mapView.userLocation.coordinate addressDictionary:[NSDictionary dictionaryWithObjectsAndKeys:@"",@"", nil]];

    MKPlacemark *aPlcDest = [[MKPlacemark alloc] initWithCoordinate:locationCoordinate addressDictionary:[NSDictionary dictionaryWithObjectsAndKeys:@"",@"", nil]];

    MKMapItem *mpItemSource = [[MKMapItem alloc] initWithPlacemark:aPlcSource];
    [mpItemSource setName:@"Source"];

    MKMapItem *mpItemDest  = [[MKMapItem alloc] initWithPlacemark:aPlcDest];
    [mpItemDest setName:@"Dest"];

    MKDirectionsRequest *aDirectReq = [[MKDirectionsRequest alloc] init];
    [aDirectReq setSource:mpItemSource];
    [aDirectReq setDestination:mpItemDest];
    [aDirectReq setTransportType:MKDirectionsTransportTypeAutomobile];

    MKDirections *aDirections = [[MKDirections alloc] initWithRequest:aDirectReq];
    [aDirections calculateDirectionsWithCompletionHandler:^(MKDirectionsResponse *response, NSError *error) {
        if (error) {
            NSLog(@"Error :: %@",error);
        }
        else{

            NSArray *aArrRoutes = [response routes];
            NSLog(@"Routes :: %@",aArrRoutes);

            [self.mapView removeOverlays:self.mapView.overlays];

            [aArrRoutes enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
                MKRoute *aRoute = obj;

                [self.mapView addOverlay:aRoute.polyline];

                NSLog(@"Route Name : %@",aRoute.name);
                NSLog(@"Total Distance (in Meters) :%f",aRoute.distance);
 NSArray *aArrSteps = [aRoute steps];

                NSLog(@"Total Steps : %lu",(unsigned long)[aArrSteps count]);

                [aArrSteps enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
                    NSLog(@"Rout Instruction : %@",[obj instructions]);
                    NSLog(@"Rout Distance : %f",[obj distance]);
                }];

            }];
        }
}];
}

当用户位置移动时 你可以调用方法

- (void)GetDirections:(CLLocationCoordinate2D)locationCoordinate

从方法

 - (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation
{
     [self GetDirections:self.annotationViewCoordinate];
}

---

试试这个-但问题是它会启动另一个地图，我必须在上面选择目的地来源，然后按“路线”来查找路线。我需要的是，只要我按下我的注释pin，我需要它自动找到路线。我有一个注释点，你可能已经看到了。如何使我在单击注释接点时立即绘制管线。[不使用右侧或左侧详图索引附件按钮]。即。你想在点击注释右键时绘制路径吗？代码更新。检查我有多傻，我从来没有想过注释有一个didSelectAnnotation委托。成功了。非常感谢。欢迎您在当前位置更新时编辑代码