CLLocationCoordinate2D to CLLocation

问题:

i have the following loop in my viewDidLoad:

    for(int i=1; i=6) {    Koordinate *coord = [[Koordinate alloc] init];    coord.latitude = [[componentsArray objectAtIndex:0] floatValue];    coord.longtitude = [[componentsArray objectAtIndex:1] floatValue];    coord.magnitude = [[componentsArray objectAtIndex:2] floatValue];    coord.depth = [[componentsArray objectAtIndex:3] floatValue];    coord.title = [componentsArray objectAtIndex:4];    coord.strasse = [componentsArray objectAtIndex:5];    coord.herkunft = [componentsArray objectAtIndex:6];    coord.telefon = [componentsArray objectAtIndex:7];    coord.internet = [componentsArray objectAtIndex:8];    [eventPoints addObject:coord];     } 

coord is CLLocationCoordinate2D

but how can i use coord in the following method, because i need this to get distance between two coords:

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

please help me i am stranded!

thank you all for helping beforehand

回答1:

CLLocation has an init method named -(id)initWithLatitude:(CLLocationDegrees)latitude longitude:(CLLocationDegrees)longitude. Then use - (CLLocationDistance)getDistanceFrom:(const CLLocation *)location to get the distance between two CLLocation objects.

回答2:

Simple

CLLocation *location = [[CLLocation alloc] initWithLatitude:lat longitude:lon]; 

回答3:

For the Swift crowd,

I have a method called "fetchCafesArroundLocation" which is refreshed after the map gets moved around. This is how I handled getting the Lat and Lon into CLLocation from CLLocationCoordiate2d and then passed the CLLocation variable to the handling method.

func mapView(mapView: MKMapView!, regionDidChangeAnimated animated: Bool){      var centre = mapView.centerCoordinate as CLLocationCoordinate2D      var getLat: CLLocationDegrees = centre.latitude     var getLon: CLLocationDegrees = centre.longitude       var getMovedMapCenter: CLLocation =  CLLocation(latitude: getLat, longitude: getLon)      self.lastLocation = getMovedMapCenter     self.fetchCafesAroundLocation(getMovedMapCenter)  } 

回答4:

“how can i use my instance as CLLocation?”

You can't, because it isn't one. You need to create one.

Don't forget to release what you alloc. See the memory management rules.

回答5:

If coord is a CCLocationCoordinate2D, then you can assign the newLocation from the

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

delegate by getting both of the latitude and longitude properties of coordinate property of the CLLocation as below:

coord.latitude = newLocation.coordinate.latitude; coord.longitude = newLocation.coordinate.longitude; 

文章来源: CLLocationCoordinate2D to CLLocation