swift3.0最新拨打电话方法

 let alertVC :
UIAlertController =
UIAlertController.init(title:
"是否拨打报警电话:10086", message:
"", preferredStyle: .alert)

        let falseAA :
UIAlertAction = UIAlertAction.init(title:
"取消", style: .cancel, handler:
nil)

        let trueAA :
UIAlertAction = UIAlertAction.init(title:
"确定", style: .default) { (alertAction)
in

            //拨打电话进行报警

            UIApplication.shared.openURL(NSURL.init(string:
"tel://10086")! as
URL)

        }

        alertVC.addAction(falseAA)

        alertVC.addAction(trueAA)

        self.present(alertVC, animated:
true, completion:
nil)