Phone call from Apple Watch with openSystem API?

Question

As I watched the WWDC 2015 session video "Introducing WatchKit for watchOS 2" (at 13:29), I saw that it is possible to make phone calls directly on Apple Watch with the openSystem API. How can I use this API in Swift?

Answer 1

You can use the openSystemURL method, which is available on the shared WKExtension object. Pass a tel: URL to this method to initiate a phone call.

if let telURL=NSURL(string:"tel:5553478") {
    let wkExtension=WKExtension.sharedExtension()
    wkExtension.openSystemURL(telURL)
}