Incorrect nullability on IUITableViewDataSource and IUITableViewDelegate

[marcoburato-ecutek]

Apple platform

iOS

Framework version

net8.0-*

Affected platform version

.NET 8.0.404, iOS workload 18.0.8319/8.0.100

Description

Some methods have nullability that does not match the actual APIs.

For instance:

IUITableViewDataSource

public string? TitleForHeader(UITableView tableView, nint section)
public string? TitleForFooter(UITableView tableView, nint section)

produce a compilation warning because the method in the interface is declared with a non-nullable return type.
However, the native APIs do allow a null return:

optional func tableView(
    _ tableView: UITableView,
    titleForHeaderInSection section: Int
) -> String?
optional func tableView(
    _ tableView: UITableView,
    titleForFooterInSection section: Int
) -> String?

IUITableViewDelegate

public NSIndexPath? WillSelectRow(UITableView tableView, NSIndexPath indexPath)

produces the same warning for the return value, even though in the native API it's nullable:

optional func tableView(
    _ tableView: UITableView,
    willSelectRowAt indexPath: IndexPath
) -> IndexPath?

These are just the methods that popped warnings in my code, but it looks like there are a few more to fix in these interfaces.

Steps to Reproduce

None (see source code)

Did you find any workaround?

No response

Relevant log output

No response

[rolfbjarne]

I can confirm this; I'll have a look to see if I can fix it.