Fix touch gestures not working on MAUI iOS once packaged

[albyrock87]

Fixes #1684

• Added Directory.Build.props to propagate properties to all project
  • I've added only MauiVersion because it was one of the issue, but I suggest to bring here also Author and other common properties (LangVersion?)..
• Added global.json file in order to use the proper .NET + workloads when debugging and packing
• Refactored MacCatalyst/iOS ChartBehaviour to avoid taking a (now) useless reference to the virtual view
  • Now keeps hard references to callbacks
• Moved event registration logic to MAUI handlers to avoid memory leaks and provide proper platform-level disconnection logic
  • Now requires .UseLiveCharts() in MAUI program
• Fixes display info not reacting to orientation / density changes on Android
• Removed <DebugType>embedded</DebugType> as it makes impossible to place breakpoints while debugging

I don't have a windows machine so I cannot try/verify I haven't broke anything there.

Please merge this as soon as possible because we're stuck due to #1684.
If you have questions I'm also available on Discord (same username).

Thanks

[beto-rodriguez]

Thanks for the PR!

I will review and merge this asap!

[albyrock87]

Hey @beto-rodriguez, I see you rebased the PR and a few conflicts appeared.

Are you gonna fix the conflicts with dev brach or should I do it?

[beto-rodriguez]

@albyrock87 I changed the base to dev, I'll try to fix conflicts with the dev branch

[albyrock87]

@beto-rodriguez do you have any news on this one?

Now that NET9 automatically disconnects MAUI handlers when leaving the page we get a crash which this PR would prevent and also handle the disconnection properly.

[beto-rodriguez]

@albyrock87 I've been working on #1705, that should be almost ready, it is an important change in the library that will improve drastically the flexibility of the library to create custom drawn elements.

I should be able to review this in the next days.

[beto-rodriguez]

Thanks again again for the PR! I tested on all platforms, and it works!

[beto-rodriguez]

Is there a particular reason to use this version?

Maybe upgrading the version to 9.x is a good idea, just want to confirm, if there is a particular reason, I can make this commit.

[albyrock87]

I recently asked Microsoft what we should use as library authors regarding broad compatibility.

I think that for now you can stick with 8.0.100 with roll forward latest feature, but make sure you target net8.0-ios17.0 in the TargetFramework and not just net8.0-ios because that implicitly targets only the latest native version released with the latest workload (right now is 18.2).

This ensures compatibility with MAUI8 and MAUI9.

Take into consideration that many developers (like me) are still on .NET8 considering that MAUI9 is still a bit "unstable", or simply because they didn't have enough time to upgrade.

[beto-rodriguez]

Also here, can I change the namespace to LiveChartsCore.SkiaSharpView.Maui?

is there a particular reason for using that ns?

[albyrock87]

The reason I've used this namespace is for dev-experience.

In MauiProgram.cs you already have this namespace imported, so the intellisense will automatically suggest the extension method.

This is a common pattern used by Microsoft.Extensions.* packages.

If you don't like it, do what you want: it's not a big deal :)

[beto-rodriguez]

Thanks @albyrock87, I will consider both comments!

[albyrock87]

@beto-rodriguez the only thing I'm sad about, which was my only ask, is that I needed this to be compatible with net8 but the library now requires net9.
Was there a specific reason?

I'll have to fork this and go back to net8 for broader compatibility.

Anyway, thanks for releasing the new version!

[beto-rodriguez]

net8 but the library now requires net9

@albyrock87 That should be a mistake on my side, I can see that net 8 should be supported, what is the error you are getting?

[beto-rodriguez]

Actually, the sample in this repo uses net 8, I am confused now 🤯

[albyrock87]

@beto-rodriguez I'm sorry, it has been a busy day and I haven't actually tried out the library, I just checked the global.json and got tricked by that.

My mistake, I apologize!

[albyrock87]

I've installed the new version and I can confirm everything works well, thank you for your effort of keeping compatibility with .net8, I appreciate a lot!

[beto-rodriguez]

Amazing! glad to read that!

Thanks for confirming that it works!