这是Apple的官方方式:
// Check for iOS 6
Class mapItemClass = [MKMapItem class];
if (mapItemClass && [mapItemClass respondsToSelector:@selector(openMapsWithItems:launchOptions:)])
{
// Create an MKMapItem to pass to the Maps app
CLLocationCoordinate2D coordinate =
CLLocationCoordinate2DMake(16.775, -3.009);
MKPlacemark *placemark = [[MKPlacemark alloc] initWithCoordinate:coordinate
addressDictionary:nil];
MKMapItem *mapItem = [[MKMapItem alloc] initWithPlacemark:placemark];
[mapItem setName:@"My Place"];
// Pass the map item to the Maps app
[mapItem openInMapsWithLaunchOptions:nil];
}
如果您想获取到该位置的驾驶或步行指示,您可以在数组中包含 a mapItemForCurrentLocation
,并适当地设置启动选项。MKMapItem
+openMapsWithItems:launchOptions:
// Check for iOS 6
Class mapItemClass = [MKMapItem class];
if (mapItemClass && [mapItemClass respondsToSelector:@selector(openMapsWithItems:launchOptions:)])
{
// Create an MKMapItem to pass to the Maps app
CLLocationCoordinate2D coordinate =
CLLocationCoordinate2DMake(16.775, -3.009);
MKPlacemark *placemark = [[MKPlacemark alloc] initWithCoordinate:coordinate
addressDictionary:nil];
MKMapItem *mapItem = [[MKMapItem alloc] initWithPlacemark:placemark];
[mapItem setName:@"My Place"];
// Set the directions mode to "Walking"
// Can use MKLaunchOptionsDirectionsModeDriving instead
NSDictionary *launchOptions = @{MKLaunchOptionsDirectionsModeKey : MKLaunchOptionsDirectionsModeWalking};
// 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];
}
else
您可以在之后的声明中保留您原来的 iOS 5 及更低版本的代码if
。请注意,如果您颠倒openMapsWithItems:
数组中项目的顺序,您将获得从坐标到当前位置的方向。您可以通过传递一个构造MKMapItem
的而不是当前的位置地图项来使用它来获取任意两个位置之间的方向。我没试过。
最后,如果您有一个地址(作为一个字符串)需要指示,请使用地理编码器创建一个MKPlacemark
, 通过CLPlacemark
.
// Check for iOS 6
Class mapItemClass = [MKMapItem class];
if (mapItemClass && [mapItemClass respondsToSelector:@selector(openMapsWithItems:launchOptions:)])
{
CLGeocoder *geocoder = [[CLGeocoder alloc] init];
[geocoder geocodeAddressString:@"Piccadilly Circus, London, UK"
completionHandler:^(NSArray *placemarks, NSError *error) {
// Convert the CLPlacemark to an MKPlacemark
// Note: There's no error checking for a failed geocode
CLPlacemark *geocodedPlacemark = [placemarks objectAtIndex:0];
MKPlacemark *placemark = [[MKPlacemark alloc]
initWithCoordinate:geocodedPlacemark.location.coordinate
addressDictionary:geocodedPlacemark.addressDictionary];
// Create a map item for the geocoded address to pass to Maps app
MKMapItem *mapItem = [[MKMapItem alloc] initWithPlacemark:placemark];
[mapItem setName:geocodedPlacemark.name];
// Set the directions mode to "Driving"
// Can use MKLaunchOptionsDirectionsModeWalking 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];
}];
}