How to share longitude and latitude using UIActivityViewController - ios

Question

I'm trying to share a (longitude, latitude) associated with your's location in a UIActivityViewController so that the user can share the location in an SMS with someone else and it shows up as a clickable little map as shown below.
I know how to share an address as a text. Here is my code for sharing the address:
#IBAction func didTapShareLocation(_ sender: UIButton) {
guard let carAddress = self.adressLabel.text else {
return
}
let textToShare = "My car is at this address: \(carAddress)"
let objectsToShare = [textToShare] as [Any]
let activityVC = UIActivityViewController(activityItems: objectsToShare, applicationActivities: nil)
activityVC.popoverPresentationController?.sourceView = sender
myParentVC?.present(activityVC, animated: true, completion: nil)
}

Answer 1

Here is a complete answer in Swift 3.1 which I put together after getting pieces of information from several places. I hope it helps someone.
#IBAction func didTapShareLocation(_ sender: UIButton) {
guard let carAddress = self.adressLabel.text, let lat = self.carCoordinates?.latitude, let lon = self.carCoordinates?.longitude else {
return
}
guard CLLocationCoordinate2DIsValid(self.carCoordinates!) else {
print("Location not valid!")
return
}
let carAddressString = "My car is at this address: \n\(carAddress)\n"
let vcardString = [
"BEGIN:VCARD",
"VERSION:3.0",
"N:;Shared Location;;;",
"FN:Shared Location",
"item1.URL;type=pref:http://maps.apple.com/?ll=\(lat),\(lon)",
"item1.X-ABLabel:map url",
"END:VCARD"
].joined(separator: "\n")
let directory = FileManager().urls(for: .cachesDirectory, in: .userDomainMask)
let path = directory.first!.path + "_vcard_for_location_sharing.loc.vcf"
do {
try vcardString.write(toFile: path, atomically: true, encoding: .ascii)
let url = NSURL(fileURLWithPath: path)
let objectsToShare = [url, carAddressString] as [Any]
let activityVC = UIActivityViewController(activityItems: objectsToShare, applicationActivities: nil)
activityVC.popoverPresentationController?.sourceView = sender
self.present(activityVC, animated: true, completion: nil)
}
catch {
print("problem saving vcard: \(error.localizedDescription)")
}
}