Detect hardware volume button press when volume not changed

Question

I need to detect the sound volume button click. Solution in Detect volume button press and used by me work only when sounds volume changed. I need to detect sound volume button click. For example when the sound has max level and the user clicks up level button this solution was not work.

 let audioSession = AVAudioSession.sharedInstance()
    self.obs = audioSession.observe( \.outputVolume ) { (av, change) in
    print("volume \(av.outputVolume)")
 }

Are there any other working solutions to detect a sound volume button press?

Whether or not you find a way to detect it, you may want to check Apple's [Review Guidelines](https://developer.apple.com/app-store/review/guidelines/) - specifically: **2.5.9** *Apps that alter or disable the functions of standard switches, such as the Volume Up/Down and Ring/Silent switches, or other native user interface elements or behaviors will be rejected.* — DonMag, Jan 13 '20 at 15:23
Does this answer your question? [Detect volume button press](https://stackoverflow.com/questions/28471481/detect-volume-button-press) — Scriptable, Jan 13 '20 at 15:31
I do not want to alter or disable the functions of standard volume. I need only detect click, in case when volume not changed. — smikhlevskiy, Jan 13 '20 at 15:31
Instagram app detecting volume button click in this case(when volume is max) — smikhlevskiy, Jan 13 '20 at 15:32
https://stackoverflow.com/questions/28471481/detect-volume-button-press in this solution detecting change sound volume and not work when volume not changed. for example when sound is max and user click up — smikhlevskiy, Jan 13 '20 at 15:38

clawesome · Accepted Answer · 2020-01-13T16:50:45.730

7

let volumeView = MPVolumeView(frame: CGRect.zero)
self.view.addSubview(volumeView)
NotificationCenter.default.addObserver(self, selector: #selector(volumeChanged(_:)), name: NSNotification.Name(rawValue: "AVSystemController_SystemVolumeDidChangeNotification"), object: nil)

This will get called every press regardless of volume level

@objc func volumeChanged(_ notification: NSNotification) {
    if let volume = notification.userInfo!["AVSystemController_AudioVolumeNotificationParameter"] as? Float {
        print("volume: \(volume)")
    }
}

output:

volume: 0.8125
volume: 0.875
volume: 0.9375
volume: 1.0
volume: 1.0
volume: 1.0
volume: 1.0

edited Jan 13 '20 at 16:50

answered Jan 13 '20 at 16:44

clawesome

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this observer never called for IPhoneXR and IOS 13.3 – smikhlevskiy Jan 13 '20 at 17:05
In simulator or on an actual device? – clawesome Jan 13 '20 at 17:16
on my real device – smikhlevskiy Jan 13 '20 at 17:24
And you have it implemented correctly? Could you create a pastebin or similar of your relevant code? I don't have an XR but I'm scratching my head that to why it would not work on it while it's fine on an 11 Pro. – clawesome Jan 13 '20 at 18:15
1

Thank You, its works. I made mistake in implementation – smikhlevskiy Jan 14 '20 at 16:17
Small addition: volumeView has possibility bee hide and it works. I have to control AVSystemController_AudioVolumeChangeReasonNotificationParameter. because I have wrong call of observer – smikhlevskiy Jan 15 '20 at 17:11
1

Best solution across other topics at StackOverFlow (> than volume 1.0) also being detected. – J A S K I E R Mar 10 '20 at 08:37
1

Don't forget to import MediaPlayer at the top. – flymg Sep 20 '20 at 13:16

Detect hardware volume button press when volume not changed

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