AVCaptureDevice devices are empty

Question

I'm trying to create a QR code scanner with this tutorial

I don't get any devices.

let deviceDiscoverySession = AVCaptureDevice.DiscoverySession(deviceTypes: [.builtInDualCamera], mediaType: AVMediaType.video, position: .back)
print(deviceDiscoverySession.devices.isEmpty)//true

I checked similar questions

Question 1 - I didn't see App Sandbox in Target Settings / Capabilities

Question 2 - I'm running the project in iPhone 6 real device, Not in simulator. And AVCaptureDevice.authorizationStatus(for: AVMediaType.video) returns .authorized. I've added Camera access description in info.plist

What device are you using for testing? – vpoltave May 16 '19 at 08:27 — vpoltave, May 16 '19 at 08:27
@vpoltave I'm using iPhone 6 – arun siva May 16 '19 at 10:52 — arun siva, May 16 '19 at 10:52

score 2 · Accepted Answer · edited Nov 19 '19 at 10:24

2

Not all iPhones contain dual camera, that's why devices is empty.

You can try add this deviceTypes: [.builtInWideAngleCamera].

Here is all available device types for now.

Also there is a good answer to question about Dual Camera - check this.

Hope this will help you!

edited Nov 19 '19 at 10:24

kzakharc

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answered May 16 '19 at 11:28

vpoltave

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Is it possible to use multiple deviceTypes with or condition. If dual camera isn't available use builtInWideAngleCamera? – arun siva May 16 '19 at 11:52
@arunsiva `DiscoverySession` init takes an array of `AVCaptureDevice.DeviceType`, so you can try desire options and see how it will play out. – vpoltave May 16 '19 at 12:41
@arunsiva I edited answer and add link to all available device types – vpoltave May 16 '19 at 13:08

AVCaptureDevice devices are empty

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