在 iOS 6 之前，打开这样的 URL 会打开 (Google) map 应用:

NSURL *url = [NSURL URLWithString:@"http://maps.google.com/?q=New+York"];
[[UIApplication sharedApplication] openURL:url];

现在有了新的 Apple Maps 实现，这只是将 Mobile Safari 打开到 Google Maps。如何使用 iOS 6 完成相同的行为？如何以编程方式打开 map 应用并让它指向特定的位置/地址/搜索/其他？

最佳答案

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];
}

如果您想获得前往该地点的驾车或步行指示，您可以添加 mapItemForCurrentLocation与 MKMapItem在 +openMapsWithItems:launchOptions: 的数组中，并适本地设置启动选项。

// 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];
}

您可以在 else 中保留原始 iOS 5 及更低版本的代码之后的声明if .请注意，如果您颠倒 openMapsWithItems: 中的项目顺序，数组，您将获得从坐标到您当前位置的路线。您可以通过传递构造的 MKMapItem 来使用它来获取任意两个位置之间的方向。而不是当前位置 map 项。我没试过。

最后，如果您有一个地址(作为一个字符串)希望得到指示，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];

    }];
}

https://stackoverflow.com/questions/12504294/