Add flashlight control

[xulihang]

Versions affected
Cordova version: 10.0.0
Cordova iOS version:
Plugin version (e.g 6.0.12): 8.0.0
iOS version (e.g 10.2): 14.4.2
Xcode version (e.g 11.1 - 11A1027): 12.2
WebRTC-adapter version (e.g. 7.4.0): latest
WebRTC Framework version (e.g. JSSip 3.1.2): ?

Description

Hi there,

I need to enable the flashlight (torch) while showing the camera preview in order to scan barcodes.

In Android, it is possible with the following code according to the media capture API:

const track = stream.getVideoTracks()[0];
track.applyConstraints({
        advanced: [{torch: true}]
      });

I wonder if it is possible to add such a flashlight control.

Thanks.

[hthetiot]

Hello,

This should be possible using example available here: https://stackoverflow.com/questions/27207278/how-to-turn-flashlight-on-and-off-in-swift/46313447

For now i don't have bandwidth to implement this feature, PR are welcome anyway.

[hthetiot]

There is already a cordova plugin for that:

• https://www.npmjs.com/package/cordova-plugin-flashlight#3-usage

Could be nice to make sure we play nice in term of compatibility.

[streamsure]

Hey folks, I've been tracking this for a very long time outside of this repository and it looks like the torch boolean is coming to native WKWebView shortly I believe!

Will the WebKit team monkey patch iOS16 or even 15? Wishful thinking I expect but I live in hope that Apple will do what's morally right and expose a fuller constraints list to support older iPhones.

I've emailed Eric today and will drop any tentative release expectations here as and when I receive a response.
WebKit Torch Boolean Issue

[hthetiot]

Even if the Webview native implement it, does not mean iosrtc will have it. It will need to be exposed by iosrtc.