[Bug] CameraView crashing when snapping picture with FlashMode set to Torch

[matteovelati]

Description

When using Torch flash mode in a camera view, I'm unable to snap pictures without crashing.

Steps to Reproduce

1. Create a CameraView with CaptureMode="Photo", CameraOptions="Back", FlashMode="{Binding CameraFlashMode}"
2. Toggle a button to switch from FlashMode="Off" to FlashMode="Torch"
3. Snap a picture

Expected Behaviour

I expect to snap a photo having the flash always on (aka Torch mode)

Actual Behavior

The flash mode changes correctly, but when I try to take a photo I get the following exception:

Foundation.MonoTouchException: Objective-C exception thrown. Name: NSInvalidArgumentException Reason: *** -[AVCapturePhotoOutput capturePhotoWithSettings:delegate:] flashMode must be set to a value present in the supportedFlashModes array

Basic Information

• Version with issue: 1.0.2, 1.2.0 pre-2
• Last known good version: na
• IDE: VisualStudio 2019 for Mac
• Platform Target Frameworks:
  • iOS: 14.4
• Nuget Packages: Xamarin.Forms 5.0.0.2012, Xamarin.Essentials 1.6.1, NETStandardLibrary 2.0.3, Network.Json 13.0.1
• Affected Devices: iPhone 6s

[GUOLDEV]

@jfversluis @pictos I have created a PR to fix the reported issue with CameraView.
Could you please have a look when you have a chance?

[AndreiMisiukevich]

Fixed in #1522

[GUOLDEV]

Thanks @AndreiMisiukevich 👍