iphone - 苹果地图：获取方向

Question

如何使用 Apple 地图获取两地之间的方向？我可以提供那两个地方的经纬度吗？是否可以在我的应用程序本身中显示方向？或者我是否需要在苹果 iPhone 的内置地图应用程序中显示方向？

Answer 1

您可以将用户发送到 iOS6 中的导航应用程序或 iOS6 之前的谷歌地图。

这是一个示例代码：

        Class itemClass = [MKMapItem class];
        if (itemClass && [itemClass respondsToSelector:@selector(openMapsWithItems:launchOptions:)]) {
            // iOS 6 MKMapItem available
            MKPlacemark* place = [[MKPlacemark alloc] initWithCoordinate:_targetLocation addressDictionary:nil];
            MKMapItem* destination = [[MKMapItem alloc] initWithPlacemark:place];
            destination.name = @"Name Here!";
            NSArray* items = [[NSArray alloc] initWithObjects: destination, nil];
            NSDictionary* options = [[NSDictionary alloc] initWithObjectsAndKeys:
                                     MKLaunchOptionsDirectionsModeDriving,
                                     MKLaunchOptionsDirectionsModeKey, nil];
            [MKMapItem openMapsWithItems:items launchOptions:options];
        } else {
            // Pre-iOS 6
            CLLocationCoordinate2D coords = _lastLocation.coordinate;

            NSString *stringURL = [NSString stringWithFormat:@"http://maps.google.com/maps?saddr=%g,%g&daddr=%g,%g", coords.latitude, coords.longitude, _targetLocation.latitude, _targetLocation.longitude];
            NSURL *url = [NSURL URLWithString:stringURL];
            [[UIApplication sharedApplication] openURL:url];
        }

Answer 2

这是在 Apple 地图上显示方向的工作代码。它适用于当前地点到您的目的地，您只需要传递目的地的纬度和经度。

double destinationLatitude, destinationLongitude;
destinationLatitude=// Latitude of destination place.
destinationLongitude=// Longitude of destination place.

Class mapItemClass = [MKMapItem class];
        if (mapItemClass && [mapItemClass respondsToSelector:@selector(openMapsWithItems:launchOptions:)])
        {

            // Create an MKMapItem to pass to the Maps app
            CLLocationCoordinate2D coordinate =
            CLLocationCoordinate2DMake(destinationLatitude,destinationLongitude);
            MKPlacemark *placemark = [[MKPlacemark alloc] initWithCoordinate:coordinate
                                                           addressDictionary:nil];
            MKMapItem *mapItem = [[MKMapItem alloc] initWithPlacemark:placemark];
            [mapItem setName:@"Name/text on destination annotation pin"];



            // Set the directions mode to "Driving"
            // Can use MKLaunchOptionsDirectionsModeDriving instead
            NSDictionary *launchOptions = @{MKLaunchOptionsDirectionsModeKey : MKLaunchOptionsDirectionsModeDriving};
            // Get the "Current User Location" MKMapItem
           MKMapItem *currentLocationMapItem = [MKMapItem mapItemForCurrentLocation];
            // Pass the current location and destination map items to the Maps app
            // Set the direction mode in the launchOptions dictionary
            [MKMapItem openMapsWithItems:@[currentLocationMapItem, mapItem]
                           launchOptions:launchOptions];