Mapkit Open Maps via Button

Question

I have created a map-based app that has various annotations on a map that when clicked on open up a small info page as shown below.

I am wondering how I can link the 'Open in Maps' button to take the coordinates of the annotation and open maps to provide a route from the users current location (already coded in) to the Annotation.

Thank you for your help

Answer 1

you will have to create mapItem from location information and then use open in maps ( https://developer.apple.com/reference/mapkit/mkmapitem/1452239-openinmapswithlaunchoptions?language=objc )

CLLocationCoordinate2D coord = CLLocationCoordinate2DMake(37.7749,-122.4194);

MKPlacemark *placeMark = [[MKPlacemark alloc] initWithCoordinate:coord addressDictionary:nil];
MKMapItem *mapItem = [[MKMapItem alloc] initWithPlacemark:placeMark];

NSMutableDictionary *launchOptions = [[NSMutableDictionary alloc] init];
[launchOptions setObject:MKLaunchOptionsDirectionsModeDriving forKey:MKLaunchOptionsMapTypeKey];
[mapItem openInMapsWithLaunchOptions:launchOptions];

Answer 2

Use openInMapsWithLaunchOptions() , as @TKearsley says.

To use that function, you need an MKMapItem .

If you look up MKMapItem in the docs, you can create an MKMapItem with the init method init(placemark:) , which expects an MKPlacemark .

So the next question is how do you create an MKPlacemark :

If you again consult the docs you'll find an initializer for MKPlacemark :

 init(coordinate: CLLocationCoordinate2D)

So, bringing it all together:

Get the coordinate of your annotation.

Use the coordinate in a call to MKPlacemark's initializer:

 init(coordinate: CLLocationCoordinate2D)

Then use the resulting MKPlacemark In MKMapItem's initializer: init(placemark:)