SwiftUI Wrapper(Page View) refactoring

[PangMo5]

Currently, PageView cannot save the state of the view due to the view life cycle of SwiftUI. (ex. scroll offset)

I changed the init design of the view to be similar to TabView, and solved the problem by utilizing UIHostingController.

In addition, I wrapped some delegates for personal use.

Added support for the scrollToPosition binding property.

Thanks for providing a good library.

[rechsteiner]

Thank you so much for this PR 🙌 This looks like a much better API, but I'm a bit worried about using the private @_functionBuilder API. I think we need to wait until Swift has official support for result builders before doing this change.

[PangMo5]

Thank you so much for this PR 🙌 This looks like a much better API, but I'm a bit worried about using the private @_functionBuilder API. I think we need to wait until Swift has official support for result builders before doing this change.

Oh I think you are right.
Then apply that part later.

Can only the wrapping part of the delegate be applied?
If possible, I will clean up and commit again.

[rechsteiner]

Yes, absolutely!

[PangMo5]

It's corrected :D