在iPhone MapView上顯示當前位置和所需位置之間的路線

Question

我想在MKMapView上顯示當前位置和所需位置之間的路線作為注釋。

做這個的最好方式是什么？

Answer 1

///在.h中添加委托MKMapViewDelegate

///在.m文件中

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation     *)newLocation fromLocation:(CLLocation *)oldLocation
{

     CLLocationCoordinate2D newcordinate =   newLocation.coordinate;
     CLLocationCoordinate2D oldcordinate =   oldLocation.coordinate;

       MKMapPoint * pointsArray =
               malloc(sizeof(CLLocationCoordinate2D)*2);

           pointsArray[0]= MKMapPointForCoordinate(oldcordinate); 
           pointsArray[1]= MKMapPointForCoordinate(newcordinate);    

            MKPolyline *  routeLine = [MKPolyline polylineWithPoints:pointsArray count:2];
           free(pointsArray);

            [MapView addOverlay:routeLine];  //MkMapView declared in .h
}

//MKMapViewDelegate

- (MKOverlayView *)mapView:(MKMapView *)mapView viewForOverlay:(id <MKOverlay>)overlay
{
    MKOverlayView* overlayView = nil;


          MKPolylineView  * _routeLineView = [[[MKPolylineView alloc]                   initWithPolyline:self.routeLine] autorelease];
            _routeLineView.fillColor = self.PathColor;
           _routeLineView.strokeColor = self.PathColor;
          _routeLineView.lineWidth = 15;
            _routeLineView.lineCap = kCGLineCapSquare;


            overlayView = _routeLineView;

            return overlayView;

}

Answer 2

我試過以下代碼......它在我的項目中運行得很好......試試吧..

首先從下載KMLParser.h和KMLParser.m 此鏈接： -

另外從這個鏈接下載DDAnnotation.h和DDAnnotation.m文件： -

現在創建一個像SomeViewController一樣的視圖控制器。

添加以下庫： -

1. CoreLocation.framework
2. MapKit.framework
3. QuartzCore.framework

在SomeViewController.h中導入KMLParser.h文件。

在SomeViewController.h中編寫以下代碼

#import <UIKit/UIKit.h>
#import <MapKit/MapKit.h>
#import "KMLParser.h"
@interface SomeViewController : UIViewController <MKMapViewDelegate, CLLocationManagerDelegate, MKOverlay>{

    double currentLat;
    double currentLong;

    double desiredLatitude;
    double desiredLongitude;

    MKMapView *mapView;
    KMLParser *kml;
    NSMutableArray *annotations;

} @property(nonatomic, retain)IBOutlet MKMapView *mapView;

@end

現在在SomeViewController.xib中拖放MapView並將其與來自File的Owner的mapView鏈接。 還要將MapView的委托設置為File的所有者。

現在在SomeViewController中編寫以下代碼： -

#import "SomeViewController.h"
#import <QuartzCore/QuartzCore.h>
#import "DDAnnotation.h"

@implementation SomeViewController
@synthesize mapView;

- (void)viewDidLoad {
    [super viewDidLoad];

    currentLat = 21.215538; //You can set current latitude here. 
    currentLong = 72.858753; //You can set current longitude here.

    desiredLatitude = 21.211976; //You can set destination latitude here.
    desiredLongitude = 72.851593; //You can set destination longitude here.

    MKCoordinateRegion region = {{0.0f, 0.0f}, {100.0f, 100.0f}};
    CLLocation* currentLocation = [[CLLocation alloc] initWithLatitude:currentLat longitude:currentLong];
    region.center = currentLocation.coordinate;
    region.span.longitudeDelta = 0.05;
    region.span.latitudeDelta  = 0.05;

    [self.mapView setRegion:region animated:YES];

    annotations=[[NSMutableArray alloc] init];

    CLLocationCoordinate2D theCoordinate;
    theCoordinate.latitude = currentLat;
    theCoordinate.longitude = currentLong;

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

    myAnnotation.coordinate=theCoordinate;
    myAnnotation.title=@"You are here";
    myAnnotation.subtitle=@"Current location";

    [mapView addAnnotation:myAnnotation];
    [annotations addObject:myAnnotation];

    CLLocationCoordinate2D theCoordinate1;
    theCoordinate1.latitude = desiredLatitude;
    theCoordinate1.longitude = desiredLongitude;

    DDAnnotation* myAnnotation1=[[DDAnnotation alloc] init];

    myAnnotation1.coordinate=theCoordinate1;
    myAnnotation1.title=@"Desired Location's Title";
    myAnnotation1.subtitle= @"Desired Location's Sub-title";

    [mapView addAnnotation:myAnnotation1];
    [annotations addObject:myAnnotation1];

    NSString *path = [NSString stringWithFormat:@"http://maps.google.com/maps?f=d&hl=en&saddr=%f,%f&daddr=%f,%f&ie=UTF8&0&om=0&output=kml",currentLat,currentLong,desiredLatitude,desiredLongitude];
    NSLog(@" Path String : %@", path); 
    kml = [[KMLParser alloc] initWithURL:[NSURL URLWithString:path]];
    [kml parseKML];

    // Add all of the MKOverlay objects parsed from the KML file to the map.
    NSArray *overlays = [kml overlays];
    [self.mapView addOverlays:overlays];

}


#pragma mark MKMapViewDelegate

- (MKOverlayView *)mapView:(MKMapView *)mapView viewForOverlay:(id <MKOverlay>)overlay
{
    return [kml viewForOverlay:overlay];
}

- (MKAnnotationView *)mapView:(MKMapView *)mV viewForAnnotation:(id <MKAnnotation>)annotation{

    // if it's the user location, just return nil.
    if ([annotation isKindOfClass:[MKUserLocation class]]){
        return nil;
    }
    else{

        static NSString* AnnotationIdentifier = @"AnnotationIdentifier";
        MKPinAnnotationView* pinView = [[[MKPinAnnotationView alloc]
                                         initWithAnnotation:annotation reuseIdentifier:AnnotationIdentifier] autorelease];
        pinView.animatesDrop=YES;
        pinView.canShowCallout=YES;
        pinView.pinColor=MKPinAnnotationColorGreen;


        return pinView;
    }   
}

Answer 3

您必須以點的方式計算自己，並將路線繪制為圖層。 在MKMapView中顯示路徑不是公共API。

最快的解決方案是打開手機的地圖應用程序和路線。