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?
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You can use the
openSystemURLmethod, which is available on the sharedWKExtensionobject. Pass atel:URL to this method to initiate a phone call.