Question

以下代码已实现，它显示当前位置，蓝色闪烁，目标位置带针。

现在我需要从当前位置绘制路线到目的地位置。

我不知道如何将当前位置配置到目标位置以在此代码中绘制路线。

//NSString *latlong = [[NSString stringWithFormat:@"%f, %f", currentLocation.latitude, currentLocation.longitude] stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
//NSString *dlatlong = [[NSString stringWithFormat:@"%f, %f", coordinate.latitude, coordinate.longitude] stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
//NSString *url = [NSString stringWithFormat: @"http://maps.google.com/maps?ll=%@&saddr=%@&daddr=%@",
//latlong, latlong, dlatlong];
//[[UIApplication sharedApplication] openURL:[NSURL URLWithString:url]];


#import "MapViewController.h"

@implementation AddressAnnotation
@synthesize coordinate;
//@synthesize currentLocation;

- (NSString *)subtitle{
    //return @"Sub Title";
    return [NSString stringWithFormat:@"%lf, %lf", coordinate.latitude, coordinate.longitude];

}
- (NSString *)title{
    //return @"Title";
    return @"Allure-Exclusive";
        //return [NSString stringWithFormat:@"%lf, %lf", coordinate.latitude, coordinate.longitude];

}

-(id)initWithCoordinate:(CLLocationCoordinate2D) c{
    coordinate=c;
    NSLog(@"%f,%f",c.latitude,c.longitude);
    return self;
}

@end

@implementation MapViewController

@synthesize address;
@synthesize currentLocation;

static MapViewController *sharedInstance;

+(MapViewController *)sharedInstance{
    @synchronized (self)
    {
        if (!sharedInstance) 
        [[MapViewController alloc]init];
        }
    return sharedInstance;
}
+(id)alloc{
    @synchronized(self){
        NSAssert(sharedInstance==nil,"Attempted to allocate a second instance of a singleton LocationController."); 
        sharedInstance = [super alloc];
    }
    return sharedInstance;
}
-(id)init{
    if(self==[super init]){
        self.currentLocation=[[CLLocation alloc]init];
        locationManager=[[CLLocationManager alloc]init];
        locationManager.delegate=self;
        [self start];
    }
    return self;
}
-(void)start{
    NSLog(@"Start");
    mapView.showsUserLocation=YES;
    [locationManager startUpdatingLocation];
}
-(void)stop{
    mapView.showsUserLocation=NO;
    [locationManager stopUpdatingLocation];
}
-(BOOL)locationKnown{
    if (round(currentLocation.speed)==-1) 
        return NO;
        else return YES;

}
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {
    if (abs([newLocation.timestamp timeIntervalSinceDate:[NSDate date]])<120){
        self.currentLocation=newLocation;
    }
}
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error {
    UIAlertView *alert;
    alert=[[UIAlertView alloc]initWithTitle:@"Error" message:[error description] delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
    [alert show];
    [alert release];
} 

- (void)locationUpdate:(CLLocation *)location{
    [mapView setCenterCoordinate:location.coordinate];
    if ([mapView showsUserLocation]==NO) 
    {[mapView setShowsUserLocation:YES];

    }


}
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
//  [self addressLocation];

    [super viewDidLoad];
    self.title=@"Map-View";
    mapView.showsUserLocation=YES;
    [self showAddress];
    NSLog(@"address is %@",address);

//NSString *latlong = [[NSString stringWithFormat:@"%f, %f", currentLocation.latitude, currentLocation.longitude] stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
//NSString *dlatlong = [[NSString stringWithFormat:@"%f, %f", coordinate.latitude, coordinate.longitude] stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
//NSString *url = [NSString stringWithFormat: @"http://maps.google.com/maps?ll=%@&saddr=%@&daddr=%@",
//latlong, latlong, dlatlong];
//[[UIApplication sharedApplication] openURL:[NSURL URLWithString:url]];
}

-(void)showAddress{ 

    MKCoordinateRegion region;
    MKCoordinateSpan span;
    span.latitudeDelta=0.5f;
    span.longitudeDelta=0.5f;

    CLLocationCoordinate2D location = [self addressLocation];
    region.span=span;
    region.center=location;

    if(addAnnotation != nil) {
        [mapView removeAnnotation:addAnnotation];
        [addAnnotation release];
        addAnnotation = nil;
    }

    addAnnotation = [[AddressAnnotation alloc] initWithCoordinate:location];
    [mapView addAnnotation:addAnnotation];
    [mapView setRegion:region animated:TRUE];
    [mapView regionThatFits:region];

}

-(CLLocationCoordinate2D) addressLocation {

    NSString *urlString = [NSString stringWithFormat:@"http://maps.google.com/maps/geo?q=%@&output=csv", 
   [address stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
//  NSString *locationString = [NSString stringWithContentsOfURL:[NSURL URLWithString:urlString]];
    NSString *locationString=[NSString stringWithContentsOfURL:[NSURL URLWithString:urlString] encoding:NSUTF8StringEncoding error:nil];
    NSLog(@"locationString %@",locationString);
    NSArray *listItems = [locationString componentsSeparatedByString:@","];
    double latitude = 0.0;
    double longitude = 0.0;
    if([listItems count] >= 4 && [[listItems objectAtIndex:0] isEqualToString:@"200"])
    {
    latitude = [[listItems objectAtIndex:2] doubleValue];
    longitude = [[listItems objectAtIndex:3] doubleValue];
    NSLog(@"listItems %@",[listItems objectAtIndex:2]);
    }
    else {
    //Show error
    }
    CLLocationCoordinate2D location;
    location.latitude = latitude;
    location.longitude = longitude;
    return location;
}

- (MKAnnotationView *) mapView:(MKMapView *)mapView1 viewForAnnotation:(id <MKAnnotation>) annotation{

    if (annotation==mapView.userLocation)
    {
    mapView1.userLocation.title=@"Current Location";
    [mapView1 setRegion:MKCoordinateRegionMakeWithDistance(mapView.userLocation.coordinate, 1000, 1000)animated:YES];
    return nil;
}
else {

    MKPinAnnotationView *annView=[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@"currentloc"];
    annView.pinColor = MKPinAnnotationColorRed;
    annView.animatesDrop=YES;
    annView.canShowCallout = YES;
    annView.calloutOffset = CGPointMake(-5,5);
    return annView;

}
}

//NSString *latlong = [[NSString stringWithFormat:@"%f, %f", currentLocation.latitude, currentLocation.longitude] stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
//NSString *dlatlong = [[NSString stringWithFormat:@"%f, %f", coordinate.latitude, coordinate.longitude] stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
//NSString *url = [NSString stringWithFormat: @"http://maps.google.com/maps?ll=%@&saddr=%@&daddr=%@",
//               latlong, latlong, dlatlong];
//[[UIApplication sharedApplication] openURL:[NSURL URLWithString:url]];



- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    // Overriden to allow any orientation.
    return YES;
}


- (void)didReceiveMemoryWarning {
    // Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];

    // Release any cached data, images, etc that aren't in use.
}


- (void)viewDidUnload {
//  [self stop];
    [super viewDidUnload];

    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}


- (void)dealloc {
    [address release];
    [currentLocation release];
    [locationManager release];
    [super dealloc];
}

@end

Answer 1

使用MKMapKit框架工作，没有任何功能可以在地图视图中从源到目标绘制路线。

您必须使用以下代码在iPhone中使用Google地图显示路线。

NSURL *url =[NSURL URLWithString:[NSString stringWithFormat:@"http://maps.google.com/maps?f=d&source=s_d&saddr=%@&daddr=%@&hl=en",[currentLoc stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding] ,[destLocation stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]]];

[[UIApplication sharedApplication] openURL:url];

如果您在点击路线按钮时编写此代码。然后应用程序将关闭，谷歌地图将打开，它将显示方向。

Answer 2

NSString *latlong = [[NSString stringWithFormat:@"%f, %f", mapView.userLocation.location.coordinate.latitude, mapView.userLocation.location.coordinate.longitude] stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSString *dlatlong = [[NSString stringWithFormat:@"%f, %f",52.366428f,4.896349f] stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSString *url = [NSString stringWithFormat: @"http://maps.google.com/maps?ll=%@&saddr=%@&daddr=%@",
latlong, latlong, dlatlong];
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:url]];

我使用此代码...它显示目标完美，用户位置为0.000000,0.000000值。

我也需要查看当前位置。

alt text

如何在iPhone中的MapView中的两个位置之间绘制路线？

2 个答案: