如何在MAUI页面中使用多个EvergineView？

在MAUI应用的同一页面中使用多个EvergineView时持续抛出异常，已基于Evergine官方EverSneaks项目做测试验证，相关修改及异常信息如下：

XAML修改（SneakersDetailsView.xaml） #

<Grid>
    <Grid.RowDefinitions>
        <RowDefinition Height="60*" />
        <RowDefinition Height="40*" />
        <RowDefinition Height="60" />
    </Grid.RowDefinitions>

    <Grid Grid.Row="0">
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="*" />
            <ColumnDefinition Width="*" />
        </Grid.ColumnDefinitions>

        <evergine:EvergineView x:Name="evergineView0" Grid.Column="0"/>
        <Image
             Grid.Column="0"
            Source="black_heart.png"
            Style="{StaticResource HeartStyle}" />

        <evergine:EvergineView x:Name="evergineView1" Grid.Column="1"/>
        <Image
            Grid.Column="1"
            Source="black_heart.png"
            Style="{StaticResource HeartStyle}" />
    </Grid>

代码后台修改（SneakersDetailsView.xaml.cs） #

public partial class SneakersDetailsView : ContentPage
{
    public SneakersDetailsView()
    {
        InitializeComponent();

        this.evergineView0.Application = new MyApplication();
        this.evergineView1.Application = new MyApplication();

        this.BindingContext = new SneakersDetailsViewModel(this.evergineView0, this.evergineView1);
    }
    
    // Unchanged methods
}

ViewModel修改（SneakersDetailsViewModel.cs） #

public class SneakersDetailsViewModel
{
    public ICommand ColorCommand { get; set; }

    private EvergineView evergineView0;
    private EvergineView evergineView1;

    private ControllerService controllerService0;
    private ControllerService controllerService1;

    public SneakersDetailsViewModel(EvergineView evergineView0, EvergineView evergineView1)
    {
        this.evergineView0 = evergineView0;
        this.controllerService0 = this.evergineView0.Application.Container.Resolve<ControllerService>();

        this.evergineView1 = evergineView1;
        this.controllerService1 = this.evergineView1.Application.Container.Resolve<ControllerService>();

        this.ColorCommand = new Command<string>(
            (color) =>
            {
                switch (color)
                {
                    case "red":
                        this.controllerService0.Color = ControllerService.SneakerColor.Red;
                        this.controllerService1.Color = ControllerService.SneakerColor.Red;
                        break;
                    case "orange":
                        this.controllerService0.Color = ControllerService.SneakerColor.Orange;
                        this.controllerService1.Color = ControllerService.SneakerColor.Orange;
                        break;
                    case "blue":
                        this.controllerService0.Color = ControllerService.SneakerColor.Blue;
                        this.controllerService1.Color = ControllerService.SneakerColor.Blue;
                        break;
                    case "gray":                            
                    default:
                        this.controllerService0.Color = ControllerService.SneakerColor.Gray;
                        this.controllerService1.Color = ControllerService.SneakerColor.Gray;
                        break;
                }                    
            });
    }
}

异常信息 #

异常表现因Evergine版本不同而有差异：

• 使用2024.10.24.7版本时，在MyApplication.Initialize()中抛出Evergine.Framwork.Exceptions.BindingException: [GraphicsPresenter].graphicsContext Failed resolving [GraphicsContext]
• 使用2024.6.28.10版本时，在ControllerService.Start()中抛出System.ArgumentNullException: Value cannot be null. Arg_ParamName_Name

已知正常场景 #

当应用中多页面各使用一个EvergineView时可正常运行，且明确不能使用静态字段Application.Current，因为每次实例化新EvergineView时该字段会被覆盖，导致不可预测的行为。

内容的提问来源于stack exchange，提问作者Mathieu Flaust