iOS: Wie bekomme ich den Weg zwischen zwei Koordinaten?

Question

In meinem Projekt muss ich den Weg zwischen zwei Orten mit Hilfe von Längen- und Breitengrad herausfinden.

Ich verwende den folgenden Code für sie

- (void)viewDidLoad { 
    [super viewDidLoad]; 
    // Do any additional setup after loading the view, typically from a nib. 
    [mapvw setDelegate:self];  
    [self mapp]; 
} 


-(void)mapp 
{ 
    CLLocationCoordinate2D coordinateArray[2]; 
    coordinateArray[0] = CLLocationCoordinate2DMake(28.6129, 77.2295); 
    coordinateArray[1] = CLLocationCoordinate2DMake(28.6562, 77.2410); 

    self.routeLine = [MKPolyline polylineWithCoordinates:coordinateArray count:2]; 
    [mapvw setVisibleMapRect:[self.routeLine boundingMapRect]]; //If you want the route to be visible 
    [mapvw addOverlay:self.routeLine]; 
} 


-(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 = 3; 

     } 

     return self.routeLineView; 
    } 

    return nil; 
} 

Mit diesem Code, den ich die Ausgabe wie diese Karte

Aber ich will die Strecke auf Simulator bekommen das zeigt Richtung auf der Straße nicht durch gerade Linie. Bitte helfen Sie mir zu lösen i m in Schwierigkeiten von den letzten 2 Tagen ....

Answer 1

Um Pfad zwischen zwei Lat lang zu zeichnen, können Sie unten Code verwenden.

ViewController.h

#import <UIKit/UIKit.h> 
#import <MapKit/MapKit.h> 

@interface ViewController : UIViewController<MKMapViewDelegate> 

@property (strong, nonatomic) IBOutlet MKMapView *myMapView; 

@end 

ViewController.m

#import "ViewController.h" 

@interface ViewController() 

@property (strong, nonatomic) MKPlacemark *destination; 
@property (strong,nonatomic) MKPlacemark *source; 

@end 

@implementation ViewController 

- (void)viewDidLoad { 
    [super viewDidLoad]; 
    // Do any additional setup after loading the view. 

    [self getDirections]; 

} 

-(void)getDirections { 

    CLLocationCoordinate2D sourceCoords = CLLocationCoordinate2DMake(37.773972, -122.431297); 

    MKCoordinateRegion region; 
    //Set Zoom level using Span 
    MKCoordinateSpan span; 
    region.center = sourceCoords; 

    span.latitudeDelta = 1; 
    span.longitudeDelta = 1; 
    region.span=span; 
    [_myMapView setRegion:region animated:TRUE]; 

    MKPlacemark *placemark = [[MKPlacemark alloc] initWithCoordinate:sourceCoords addressDictionary:nil]; 

    MKPointAnnotation *annotation = [[MKPointAnnotation alloc] init]; 
    annotation.coordinate = sourceCoords; 
    annotation.title = @"San Francisco"; 
    [self.myMapView addAnnotation:annotation]; 
    //[self.myMapView addAnnotation:placemark]; 

    _destination = placemark; 

    MKMapItem *mapItem = [[MKMapItem alloc] initWithPlacemark:_destination]; 

    CLLocationCoordinate2D destCoords = CLLocationCoordinate2DMake(37.615223, -122.389977); 
    MKPlacemark *placemark1 = [[MKPlacemark alloc] initWithCoordinate:destCoords addressDictionary:nil]; 

    MKPointAnnotation *annotation1 = [[MKPointAnnotation alloc] init]; 
    annotation1.coordinate = destCoords; 
    annotation1.title = @"San Francisco University"; 
    [self.myMapView addAnnotation:annotation1]; 

    //[self.myMapView addAnnotation:placemark1]; 

    _source = placemark1; 

    MKMapItem *mapItem1 = [[MKMapItem alloc] initWithPlacemark:_source]; 

    MKDirectionsRequest *request = [[MKDirectionsRequest alloc] init]; 
    request.source = mapItem1; 

    request.destination = mapItem; 
    request.requestsAlternateRoutes = NO; 

    MKDirections *directions = [[MKDirections alloc] initWithRequest:request]; 

    [directions calculateDirectionsWithCompletionHandler: 
     ^(MKDirectionsResponse *response, NSError *error) { 
      if (error) { 
       NSLog(@"ERROR"); 
       NSLog(@"%@",[error localizedDescription]); 
      } else { 
       [self showRoute:response]; 
      } 
     }]; 
} 

-(void)showRoute:(MKDirectionsResponse *)response 
{ 
    for (MKRoute *route in response.routes) 
    { 
     [_myMapView 
     addOverlay:route.polyline level:MKOverlayLevelAboveRoads]; 

     for (MKRouteStep *step in route.steps) 
     { 
      NSLog(@"%@", step.instructions); 
     } 
    } 
} 

#pragma mark - MKMapViewDelegate methods 

- (MKOverlayRenderer *)mapView:(MKMapView *)mapView rendererForOverlay:(id<MKOverlay>)overlay 
{ 
    MKPolylineRenderer *renderer = [[MKPolylineRenderer alloc] initWithPolyline:overlay]; 
    renderer.strokeColor = [UIColor colorWithRed:0.0/255.0 green:171.0/255.0 blue:253.0/255.0 alpha:1.0]; 
    renderer.lineWidth = 10.0; 
    return renderer; 
} 

es Ihnen Hoffnung wird helfen! Ändern Sie lat im obigen Code gemäß Ihrer Anforderung.