[英]How to draw a route between my current location to desired location on MKMapView?
我想顯示我當前位置和所需位置之間的路線。 我能夠做到這一點,但是當源點和目標點到目前為止時,它不會顯示路線並給出內存警告。 你能建議任何示例代碼或任何方法來做到這一點嗎?
以下代碼用於當前位置到所需位置之間的繪制路徑
- (void)viewDidLoad {
[super viewDidLoad];
mapView = [[[MapView alloc] initWithFrame:
CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)] autorelease];
[self.view addSubview:mapView];
[self performSelector:@selector(LoadMaps) withObject:self afterDelay:1.0];
}
-(void)LoadMaps{
MapWithRoutesAppDelegate *app = (MapWithRoutesAppDelegate *)[[UIApplication sharedApplication]delegate];
CLLocation *location = app.userlocation;
// Configure the new event with information from the location
CLLocationCoordinate2D coordinate = [location coordinate];
NSString *latitude = [NSString stringWithFormat:@"%f", coordinate.latitude];
NSString *longitude = [NSString stringWithFormat:@"%f", coordinate.longitude];
NSLog(@"dLatitude : %@", latitude);
NSLog(@"dLongitude : %@",longitude);
Place* home = [[[Place alloc] init] autorelease];
home.name = @"Home";
home.description = @"Sweet home";
home.latitude = coordinate.latitude;
home.longitude = coordinate.longitude;
Place* office = [[[Place alloc] init] autorelease];
office.name = @"Office";
office.description = @"Bad office";
office.latitude = 23.329404;
office.longitude = 72.0039299;
[mapView showRouteFrom:home to:office];
NSLog(@"latitide:%.7f, longitude: %.7f ", coordinate.latitude, coordinate.longitude);
}
在 Appdelegate 方法中包含
#pragma mark- CLLocationManager delegate
- (void)locationManager:(CLLocationManager *)manager
didUpdateToLocation:(CLLocation *)newLocation
fromLocation:(CLLocation *)oldLocation{
MapWithRoutesAppDelegate *app = (MapWithRoutesAppDelegate*)[[UIApplication sharedApplication] delegate];
app.userlocation = newLocation;
NSLog(@"latitide:%.7f, longitude: %.7f ", app.userlocation.coordinate.latitude, app.userlocation.coordinate.longitude);
}
可能這有很大幫助。
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