问题描述

我正在尝试从我的 iPhone SDK 应用程序启动地图应用程序.现在我可以启动带有路线的地图应用程序，但它会转到路线概览，并且不使用 Siri 和语音导航来提供转弯路线.

I am trying to launch the maps app from my iPhone SDK app. Right now I can launch the maps app with directions but it goes to an overview of the directions and doesn't use Siri and the voice navigation to give turn by turn directions.

目前我有一个启动此代码的按钮...

currently I have a button that launches this code...

NSString *address = viewedObject.addressFull;
NSString *url = [NSString stringWithFormat: @"http://maps.apple.com/maps?saddr=%f,%f&daddr=%@", here.latitude, here.longitude, [address stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:url]];

推荐答案

iOS 6 提供了一种启动地图的新方法，使用 MKMapItem 中的 openMapsWithItems:.这是我使用的一个片段，它提供从当前位置到所提供坐标的步行或驾车路线:

With iOS 6 there's a new way to launch maps, using openMapsWithItems: in MKMapItem. Here's a snippet that I use that provides walking or driving directions from current location to the provided coordinates:

// iOS 6.0+ only
MKPlacemark* destPlace = [[[MKPlacemark alloc] initWithCoordinate:coordinate addressDictionary:nil] autorelease];
MKMapItem* destMapItem = [[[MKMapItem alloc] initWithPlacemark:destPlace] autorelease]; destMapItem.name = stationItem.title;

NSArray* mapItems = [[[NSArray alloc] initWithObjects: destMapItem, nil] autorelease];
NSDictionary* options = [NSDictionary dictionaryWithObjectsAndKeys:
                                 walking ? MKLaunchOptionsDirectionsModeWalking : MKLaunchOptionsDirectionsModeDriving,
                                 MKLaunchOptionsDirectionsModeKey, nil];
[MKMapItem openMapsWithItems:mapItems launchOptions:options];

按照您的方式，如果在 iOS 6 之前的设备上运行，您仍然需要这样做，您需要在 URL 中包含 dirflg 以请求步行或驾车路线:

The way you are doing it, which you still have to do if running on pre-iOS 6 devices, you need to include the dirflg in the URL to request walking or driving directions:

// pre iOS 6 code
NSString *urlString = [NSString stringWithFormat:@"http://maps.google.com/maps?saddr=%f,%f&daddr=%f,%f&dirflg=%c",
    currentLocation.coordinate.latitude,
    currentLocation.coordinate.longitude,
    destination.coordinate.latitude,
    destination.coordinate.longitude,
    walking ? 'w' : 'd'];

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