How to share my current location to UIActivityViewController?

Question

I know i can add things like text, URL, images to UIActivityViewController , but how to add my current location with a thumbnail of my location like in the tweet shown below

Answer 1

The other two answers use the complex AddressBook framework to create a vCard. It's easier to do it like this:

NSString *vcardString = [NSString stringWithFormat:@"BEGIN:VCARD\n"
                         "VERSION:3.0\n"
                         "    N:;Shared Location;;;\n"
                         "   FN:Shared Location\n"
                         "item1.URL;type=pref:http://maps.apple.com/?ll=%f,%f\n"
                         "item1.X-ABLabel:map url\n"
                         "END:VCARD", lat, lng];

Then save it to a file, get the NSURL of that file, and share it with UIActivityViewController as demonstrated in artillery129's answer.

Answer 2

The correct way is to make the card using Data, not a file:

Swift 4

    import MobileCoreServices

    let locationTitle: String = ...
    let coordinate: CLLocationCoordinate2D = ...

    let vCardString = [
        "BEGIN:VCARD",
        "VERSION:4.0",
        "N:;\(locationTitle);;;",
        "FN:\(locationTitle)",
        "item1.URL;type=pref:http://maps.apple.com/?ll=\(coordinate.latitude),\(coordinate.longitude)",
        "item1.X-ABLabel:map url",
        "END:VCARD"
        ].joined(separator: "\n")

    guard let vCardData = vCardString.data(using: .utf8) else { return }

    var items = [Any]()
    let vCardActivity = NSItemProvider(item: vCardData as NSData, typeIdentifier: kUTTypeVCard as String)
    items.append(vCardActivity)
    items.append(locationTitle)
    let activityViewController = UIActivityViewController(activityItems: items, applicationActivities: nil)
    present(activityViewController, animated: true, completion: nil)