根据位置Swift 3转动Ringer Silent

Question

我已准备好应用程序，但我仍然坚持要添加代码以使铃声无声。当我按下按钮时会发送通知，但我想将铃声音量调为0.这是我的代码。我也很困惑在哪里放这个代码。

import UIKit
import MapKit

protocol AddViewControllerDelegate {
    func addViewController(controller: AddViewController, didAddCoordinate coordinate: CLLocationCoordinate2D, radius: Double, identifier: String, note: String, eventType: EventType)
}

class AddViewController: UITableViewController {


@IBOutlet var addButton: UIBarButtonItem!
@IBOutlet var zoomButton: UIBarButtonItem!
@IBOutlet weak var eventTypeSegmentedControl: UISegmentedControl!
@IBOutlet weak var radiusTextField: UITextField!
@IBOutlet weak var noteTextField: UITextField!
@IBOutlet weak var mapView: MKMapView!

var delegate: AddViewControllerDelegate?

override func viewDidLoad() {
    super.viewDidLoad()
    navigationItem.rightBarButtonItems = [addButton, zoomButton]
    addButton.isEnabled = false
}

@IBAction func textFieldEditingChanged(sender: UITextField) {
    addButton.isEnabled = !radiusTextField.text!.isEmpty && !noteTextField.text!.isEmpty
}

@IBAction func onCancel(sender: AnyObject) {
    dismiss(animated: true, completion: nil)
}

@IBAction private func onAdd(sender: AnyObject) {
    let coordinate = mapView.centerCoordinate
    let radius = Double(radiusTextField.text!) ?? 0
    let identifier = NSUUID().uuidString
    let note = noteTextField.text
    let eventType: EventType = (eventTypeSegmentedControl.selectedSegmentIndex == 0) ? .onEntry : .onExit
    delegate?.addViewController(controller: self, didAddCoordinate: coordinate, radius: radius, identifier: identifier, note: note!, eventType: eventType)
}

@IBAction private func onZoomToCurrentLocation(sender: AnyObject) {
    mapView.zoomToUserLocation()
}
}