[XI] doesn't support QuickLook extensions

[mykyta-bondarenko]

I am porting swift sample into the Xamarin and found that XI doesn't support QuickLook extensions.

Steps to Reproduce

1. Download a sample
2. Run it
3. Create an internal document and save it ('Done' button)

Expected Behavior

QLThumbnailProvider implementation is invoked and thumbnail is created

Actual Behavior

There is default icon and no additional call

Environment

1. VSfM
   https://gist.github.com/mykyta-bondarenko-gl/56bb56c36608563c29d56040a0e55252

Build Logs

1. Build Output
   https://gist.github.com/mykyta-bondarenko-gl/2ed4831f94368b3a00054b0c0c87ff52

Example Project

Particles

[spouliot]

I only recall QuickLook from macOS... from the logs there's at least some places when it's not implemented.

https://gist.github.com/mykyta-bondarenko-gl/2ed4831f94368b3a00054b0c0c87ff52#file-build-output-L10686

/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/iOS/Xamarin.iOS.Common.targets(1644,3): warning : The App Extension 'Particles.Preview' has an unrecognized NSExtensionPointIdentifier value ('com.apple.quicklook.preview').

/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/iOS/Xamarin.iOS.Common.targets(1644,3): warning : The App Extension 'Particles.Thumbnails' has an unrecognized NSExtensionPointIdentifier value ('com.apple.quicklook.thumbnail').

[heshuimu]

I was working on adding a QuickLook extension to my Xamarin.iOS project and I am very surprised that QuickLook is not implemented yet.
Since this is not labeled help wanted or bug, per the Contribution Guideline I'll have to ask the issue owner (though no one is assigned): @spouliot Is it OK if I could take a stab at this?

[spouliot]

@heshuimu sorry I missed your original comment (lost in too many emails) :(
You're most welcome to have a stab at this. Feel free to reach out to us on Gitter if you have any question :)

[corliss]

Hi, I just ran into this issue. Why is it not a high priority issue? It means that document based apps will not be able to return a thumbnail.

Is there a simple way to implement Quicklook extensions using Xamarin, or is this something that the Xamarin team needs to wrap and expose?

[anassisi2]

I'm looking for a Quicklook Extension as well for my app files. (Xamarin Forms + iOS)
@sebastien, do you have a sample project to share?

[mobilinked]

Same issue here. Would you please help to share the current status or your plan?