Perform action in host app from Today extension(Widget) Without opening app ios

Question

I want to manage some action in containing app from today extension(Widget).

Full description: in my containing app, some action (like play/pause audio) perform. An

Answer 1

Use MMWormhole (or its new and unofficial Swift version, just Wormhole). It's very simple.

In the app's view controller:

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
    let wormhole = MMWormhole(applicationGroupIdentifier: "group.test.TodayExtensionSharingDefaults",
                              optionalDirectory: "TodayExtensionSharingDefaults")

    wormhole.listenForMessage(withIdentifier: "togglePlayPause") { [weak self] _ in
        guard let controller = self else { return }
        controller.btnValue.isSelected = controller.btnValue.isSelected
    }
}

In the extension:

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view from its nib.

    self.wormhole = MMWormhole(applicationGroupIdentifier: "group.test.TodayExtensionSharingDefaults", optionalDirectory: "TodayExtensionSharingDefaults")
}

@IBAction func onPlayPause(_ sender: UIButton) {
    guard let wormhole = self.wormhole else { extensionContext?.openURL(NSURL(string: "foo://startPlaying")!, completionHandler: nil) } // Throw error here instead of return, since somehow this function was called before viewDidLoad (or something else went horribly wrong)

    wormhole.passMessageObject(nil, identifier: "togglePlayPause")
}

Declare foo:// (or whatever else you use) in Xcode's Document Types section, under URLs, then implement application(_:open:options:) in your AppDelegate so that the app starts playing music when the URL passed is foo://startPlaying.