Propagate .options changes when SwiftUI View is updated

[nfgrilo]

• SwiftUI only
• git branch: 4.0

Currently, when the View holding the PageView has changes and need refresh, PageView modifiers changes are not propagated to UIKit (but SwiftUI contents inside Page are 👍🏼).

My use case is that I support custom themes on my app, and everything is correctly updated except for the menu items.

I have attached three patches (4.0 branch):

• one to demonstrate the issue/use case (changes are applied to DefaultView on ExampleSwiftUI target)
• one to allow the propagation of .options via PagingControllerRepresentableView.updateUIViewController()
• one to respect the .indicatorStyle() modifier (after propagating options)

0001-Added-changes-to-DefaultView-to-exemplify.patch
0002-Propagate-.options-modifiers-on-View-updates.patch
0003-Fixed-.indicatorStyle-not-being-respected.patch

I would be very grateful if you could give a try and have a look!

[nfgrilo]

If you find useful, I can create a PR from my fork https://github.com/nfgrilo/Parchment/tree/4.0

[rechsteiner]

Thank you so much for the detailed issue and fix! I really appreciate it 🙌 The patches you provided look great. Feel free to create a PR from your fork, although we can probably skip the DefaultView changes.

[nfgrilo]

Thanks! I've created a PR with a single commit here: #703

Great work ❤️