Update PageViewController with events we can hook into for lifecycle methods like ViewDidAppear

[JohnHDev]

Description

The new handler style doesn't hook in well in PageHandler for UIViewController lifecycle events. In XF we override ViewWillAppear but we can't do that with handlers (as far as I can see).

Since PageHandler uses a PageViewController MS can update that with lifecycle events so we can wire up cleanly.

https://github.com/dotnet/maui/blob/bd64a7ab2f1c0992d667d93576d16bc565d0e041/src/Core/src/Platform/iOS/PageViewController.cs

Public API Changes

Add ViewWillAppear and other lifecycle events to PageViewController.

Intended Use-Case

Much easier customisation on iOS, think adding buttons on the left instead of the right. Can't do this easily with the current Handler implementation.

[ghost]

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[PureWeen]

@JohnHDev Yea :-/ we really need to provide a virtual method for the ViewController

Not a great solution but can you just copy and paste that whole https://github.com/dotnet/maui/blob/main/src/Core/src/Handlers/Page/PageHandler.iOS.cs#L10-L25 into your handler?

[JohnHDev]

@PureWeen Thanks, yes that should work, I'll take another look at this shortly.