我有有效的代码，但我注意到创建页面元素相当慢。

这是我到目前为止所拥有的。请注意，我不会一次添加所有内容，因为我发现创建页面时速度更慢。

    public void CreateSwitchSection(bool? selected) 
    { 
        Application.Current.Resources.TryGetValue("FrameBorder", out object frameBorder); 
        var st = new StackLayout { Orientation = StackOrientation.Vertical, Spacing = 0 }; 
        st.Children.Add(AddSwitchRows(selected, App.cardSetWithWordCount.Take(20))); 
        st.Children.Add(AddSwitchRows(selected, App.cardSetWithWordCount.Skip(20).Take(20))); 
        st.Children.Add(AddSwitchRows(selected, App.cardSetWithWordCount.Skip(40).Take(20))); 
        st.Children.Add(AddSwitchRows(selected, App.cardSetWithWordCount.Skip(60).Take(20))); 
        st.Children.Add(AddSwitchRows(selected, App.cardSetWithWordCount.Skip(80).Take(20))); 
        var fr = new Frame { Style = (Style)frameBorder }; 
        var fs = new FrameStack { }; 
        var ht = new HeaderTemplate() 
        { 
            Text = "CHOOSE CARD SETS FOR THE DECK" 
        }; 
        fs.Children.Add(ht); 
        fs.Children.Add(st); 
        fs.Children.Add(new LineTemplate()); 
        fr.Content = fs; 
        details.Children.Clear(); 
        details.Children.Add(fr); 
    } 
 
    private StackLayout AddSwitchRows(bool? selected, IEnumerable<CardSetWithWordCount> data) 
    { 
        var stack = new StackLayout 
        { 
            Orientation = StackOrientation.Vertical, 
            Spacing = 0 
        }; 
 
        foreach (var x in data) 
        { 
            var cell = new BadgeGridTemplate 
            { 
                BindingContext = x, 
                Text = x.Name, 
                State = selected == true ? "E" : "D", 
                Message = x.TotalWordCount.ToString(), 
                TapCommand = (Command)vm.SelectCardSetCmd, 
                RowId = x.Id, 
                Separator = true 
            }; 
            stack.Children.Add(cell); 
        } 
        return stack; 
    } 

<?xml version="1.0" encoding="UTF-8"?> 
<t:BaseGridTemplate xmlns="http://xamarin.com/schemas/2014/forms"  
                    xmlns:t="clr-namespace:Japanese.Templates"  
                    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"  
                    xmlns:local="clr-namespace:Japanese;assembly=Japanese"  
                    xmlns:b="clr-namespace:Behaviors;assembly=Behaviors"  
                    xmlns:converters="clr-namespace:Japanese.Converters;assembly=Japanese"  
                    x:Class="Japanese.Templates.BadgeGridTemplate"  
                    x:Name="this"  
                    HeightRequest="{DynamicResource GridHeight}" Margin="0" 
    Orientation="Vertical" Spacing="0"> 
    <BoxView HeightRequest="1" HorizontalOptions="FillAndExpand" IsVisible="{Binding Separator, Source={x:Reference this}}" BackgroundColor="{DynamicResource LineColor}" Margin="0" /> 
    <Grid Padding="20,0" VerticalOptions="CenterAndExpand"> 
        <Grid.ColumnDefinitions> 
            <ColumnDefinition /> 
            <ColumnDefinition Width="Auto" /> 
        </Grid.ColumnDefinitions> 
        <Label Grid.Column="0" Text="{Binding Text,  Source={x:Reference this}}" TextColor="{DynamicResource LabelColor}" Style="{StaticResource LabelText}" VerticalTextAlignment="Center" WidthRequest="30" /> 
        <t:Button Grid.Column="1" Meta="GsT" RowId="{Binding RowId, Source={x:Reference this}}" State="{Binding State, Source={x:Reference this}}" TapCommand="{Binding TapCommand, Source={x:Reference this}}" Text="{Binding Message, Source={x:Reference this}}" Theme="{Binding Theme}" WidthRequest="30" /> 
    </Grid> 
</t:BaseGridTemplate> 

请您参考如下方法:

您可以尝试在子循环添加到您的函数 AddSwitchRows 和循环之后的 BatchCommit() 之前在 stacks 变量上使用 BatchBegin()。如果可行，请对 CreateSwitchSection 中的父堆栈变量 st 执行相同操作。

IE。
stacks.BatchBegin();
foreach var x 在数据中
{
…
}
stacks.BatchCommit();

这可以解决它，因为许多显示表单的语言都喜欢在每次添加/删除/更新集合/列表/子项时(昂贵)重新计算布局。批处理允许布局重新计算一次而不是每次列表更改时进行。