Add support for iOS applications serving a webpage inside WKWebView

[cbxp]

Solves an issue in the twilio-video library: twilio/twilio-video.js#1364

The following error is caused by getSdpFormat() which is not able to guess the browser if a webpage is rendered inside WKWebView in an iOS application.

Calling setRemoteDescription with an RTCSessionDescription of type "answer" failed with the error "Failed to set remote answer sdp: The order of m-lines in answer doesn't match order in offer. Rejecting answer.

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[noahmehl]

@manjeshbhargav Would it be possible to review this please?

[ac1dev]

@manjeshbhargav Are you planning to review this? It's very important for many of us.

[shaun-nunns]

Please could this be reviewed?

The changes are straightforward and would be a big benefit to users of the platform

[lu-roth]

+1

[dcoughlin]

+1

[lu-roth]

Asking once again to review please 👍

[dfox288]

We patched this in our own fork and it works fine. An official release would be highly appreciated

+1

[lukewarlow]

Hate to do these kind of +1 comments, but if this is a blocker in supporting other browsers on iOS (all of which are WKWebViews) it would be much appreciated if it could be reviewed and merged.

[SergeyPoznyakAkvelon]

For anyone who needs it now there is a workaround:

When initializing WKWebView add this code:

if let ua = webView.value(forKey: "userAgent") as? String {
    webView.customUserAgent = ua + " Safari"
}

This will trick twilio-video.js into thinking it's running in normal Safari.

[PikaJoyce]

Hi everyone!

Thank you for all of your feedback and your patience with us. We have heard you and have merged VIDEO-8374 with @cbxp's suggestions and are in the process of releasing some time in the near future!

I will now be closing this pull request.

Thank you all once again!
Joyce