CollectionView在.net maui中使用延迟

我在.net maui中创建了这个简单的应用程序,并使用了CollectionView和SwipeGestureRecognizer 用于在月份之间切换。 问题是该应用程序运行速度非常慢。当我向右或向左滑动时,延迟3/4秒后更改月份。

我如何才能修复它,或者我可以使用其他方法来制作这个应用程序?

以下是xaml代码:

<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui" xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" xmlns:dxco="clr-namespace:DevExpress.Maui.Controls;assembly=DevExpress.Maui.Controls" xmlns:dxc="clr-namespace:DevExpress.Maui.Charts;assembly=DevExpress.Maui.Charts" xmlns:dxcv="clr-namespace:DevExpress.Maui.CollectionView;assembly=DevExpress.Maui.CollectionView" xmlns:dxsch="clr-namespace:DevExpress.Maui.Scheduler;assembly=DevExpress.Maui.Scheduler" xmlns:dxg="clr-namespace:DevExpress.Maui.DataGrid;assembly=DevExpress.Maui.DataGrid" xmlns:dxe="clr-namespace:DevExpress.Maui.Editors;assembly=DevExpress.Maui.Editors" xmlns:dxdf="clr-namespace:DevExpress.Maui.DataForm;assembly=DevExpress.Maui.Editors" xmlns:ios="clr-namespace:Microsoft.Maui.Controls.PlatformConfiguration.iOSSpecific;assembly=Microsoft.Maui.Controls" ios:Page.UseSafeArea="true" x:Class= "Calendar.MainPage">
    <ContentView>
        <ContentView.GestureRecognizers>
            <SwipeGestureRecognizer Direction="Right" Command="{Binding SwipeRightCommand}" />
            <SwipeGestureRecognizer Direction="Left" Command="{Binding SwipeLeftCommand}" />
        </ContentView.GestureRecognizers>
        <Grid BackgroundColor="#fff">
            <Grid.RowDefinitions>
                <RowDefinition Height="Auto" />
                <RowDefinition Height="Auto" />
                <RowDefinition Height="Auto" />
                <RowDefinition Height="Auto" />
                <RowDefinition Height="*" />
            </Grid.RowDefinitions>

            <Label Text="{Binding MonthYearLabel}" HorizontalOptions="Center" VerticalOptions="Start" 
           FontSize="24" TextColor="#333" Margin="0,10,0,2" Grid.Row="0"/>

            <Grid Grid.Row="1">
                <Grid.ColumnDefinitions>
                    <ColumnDefinition />
                    <ColumnDefinition />
                    <ColumnDefinition />
                    <ColumnDefinition />
                    <ColumnDefinition />
                    <ColumnDefinition />
                    <ColumnDefinition />
                </Grid.ColumnDefinitions>
                <Label Text="friday" TextColor="#f2291b" HorizontalOptions="Center" Grid.Column="0"/>
                <Label Text="thursday" TextColor="#666" HorizontalOptions="Center" Grid.Column="1"/>
                <Label Text="wednesday" TextColor="#666" HorizontalOptions="Center" Grid.Column="2"/>
                <Label Text="tueseday" TextColor="#666" HorizontalOptions="Center" Grid.Column="3"/>
                <Label Text="monday" TextColor="#666" HorizontalOptions="Center" Grid.Column="4"/>
                <Label Text="sunday" TextColor="#666" HorizontalOptions="Center" Grid.Column="5"/>
                <Label Text="saturday" TextColor="#666" HorizontalOptions="Center" Grid.Column="6"/>
            </Grid>

            <CollectionView Grid.Row="2" ItemsSource="{Binding Days}" SelectionMode="None">
                <CollectionView.ItemsLayout>
                    <GridItemsLayout Orientation="Vertical" Span="7" />
                </CollectionView.ItemsLayout>
                <CollectionView.ItemTemplate>
                    <DataTemplate>
                        <Frame BorderColor="#DDD" BackgroundColor="{Binding BackgroundColor}" Padding="10" CornerRadius="5" HasShadow="True">
                            <StackLayout Orientation="Vertical" HorizontalOptions="Center" VerticalOptions="Center">
                                <Label Text="{Binding SolarDay}" TextColor="{Binding TextColor}" FontSize="18" HorizontalOptions="CenterAndExpand" />
                                <StackLayout Orientation="Horizontal" HorizontalOptions="Center" VerticalOptions="End">
                                    <!--<Label Text="{Binding AdDay}" Margin="0,5,7,0" TextColor="{Binding TextColor}" FontSize="12" HorizontalOptions="End" />
                            <Label Text="{Binding LunarDay}" Margin="7,5,0,0" TextColor="{Binding TextColor}" FontSize="12" HorizontalOptions="Start" />-->
                                </StackLayout>
                            </StackLayout>
                        </Frame>
                    </DataTemplate>
                </CollectionView.ItemTemplate>
            </CollectionView>
        </Grid>
    </ContentView>
</ContentPage>

这里是C#代码:

using System.Collections.ObjectModel;
using System.Windows.Input;

namespace Calendar
{
    public partial class MainPage : ContentPage
    {
        private PersianDateTime currentDate;
        private ObservableCollection<DayModel> days;
        public ObservableCollection<DayModel> Days
        {
            get => days;
            set
            {
                days = value;
                OnPropertyChanged();
            }
        }

        public ICommand SwipeRightCommand => new Command(ShowNextMonth);
        public ICommand SwipeLeftCommand => new Command(ShowPreviousMonth);

        public string MonthYearLabel
        {
            get => currentDate.ToString("MMMM yyyy");
        }

        public MainPage()
        {
            InitializeComponent();

            currentDate = PersianDateTime.Now;
            Days = new ObservableCollection<DayModel>(GenerateCalendar(currentDate).Cast<DayModel>().ToList());
            BindingContext = this;
        }

        private void ShowPreviousMonth()
        {
            currentDate = currentDate.AddMonths(-1);
            Days = new ObservableCollection<DayModel>(GenerateCalendar(currentDate).Cast<DayModel>().ToList());
            OnPropertyChanged(nameof(MonthYearLabel));
        }

        private void ShowNextMonth()
        {
            currentDate = currentDate.AddMonths(1);
            Days = new ObservableCollection<DayModel>(GenerateCalendar(currentDate).Cast<DayModel>().ToList());
            OnPropertyChanged(nameof(MonthYearLabel));
        }

        private DayModel[,] GenerateCalendar(PersianDateTime date)
        {
            var daysInMonth = PersianDateTime.GetDaysInMonth(date.Year, date.Month);
            var firstDayOfMonth = new PersianDateTime(date.Year, date.Month, 1);
            int offset = firstDayOfMonth.DayOfWeek;
            var dayModels = new DayModel[(int)Math.Ceiling((daysInMonth + offset) / 7.0), 7];

            int currentDay = 1;

            for (int row = 0; row < dayModels.GetLength(0); row++)
            {
                for (int col = dayModels.GetLength(1) - 1; col >= 0; col--)
                {
                    if (row == 0 && col > 6 - offset)
                    {
                        dayModels[row, col] = new DayModel
                        {
                            SolarDay = 0,
                            BackgroundColor = Color.FromRgba("#ffffff"),
                            TextColor = Color.FromRgba("#ffffff")
                        };
                    }
                    else if (currentDay <= daysInMonth)
                    {
                        dayModels[row, col] = new DayModel
                        {
                            SolarDay = currentDay,
                            BackgroundColor = Color.FromRgba("#ffffff"),
                            TextColor = Color.FromRgba("#000000")
                        };
                        currentDay++;
                    }
                }
            }

            return dayModels;
        }
    }
}

问题也不是PersianDateTime-Nuget包的原因,我尝试了System.Globalization.Calendars,但问题仍然存在。