5.列表选择弹窗（BottomListPopup）

愿你出走半生,归来仍是少年！ 

环境：.NET 7、MAUI 

        从底部弹出的列表选择弹窗。

1.布局

<?xml version="1.0" encoding="utf-8" ?>
<toolkit:Popup xmlns="http://schemas.microsoft.com/dotnet/2021/maui"xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"x:Class="MauiLib.Utility.Controls.Popups.BottomListPopup"xmlns:toolkit="http://schemas.microsoft.com/dotnet/2022/maui/toolkit"x:Name="popup" xmlns:config="clr-namespace:MauiLib.Utility.Configs;assembly=MauiLib.Utility"Color="Transparent" VerticalOptions="End" > <VerticalStackLayout x:Name="outLyt"    BackgroundColor="Transparent"><Border  WidthRequest="1000"     BackgroundColor="White"   StrokeThickness="1"  StrokeShape="RoundRectangle 10,10,10,10"  HorizontalOptions="Center"><VerticalStackLayout    ><Label  x:Name="lbTitle"   Text="请选择任意一项" FontAttributes="Bold"  HorizontalOptions="Center" Padding="0,15,0,15" FontSize="18"/><Border Stroke="{Static config:ThemeConfig.SubTitle}" BackgroundColor="{Static config:ThemeConfig.SubTitle}"   StrokeThickness="0.2"  /><ListView    x:Name="lv"     RowHeight="35"   ItemSelected="lv_ItemSelected"   VerticalScrollBarVisibility="Never"><ListView.ItemTemplate><DataTemplate><ViewCell><Grid ><Grid.RowDefinitions><RowDefinition   /></Grid.RowDefinitions><Grid.ColumnDefinitions><ColumnDefinition  /></Grid.ColumnDefinitions><Label  Text="{Binding}" FontSize="14"  HorizontalTextAlignment="Center" VerticalTextAlignment="Center" TextColor="Black"/></Grid></ViewCell></DataTemplate></ListView.ItemTemplate></ListView></VerticalStackLayout></Border></VerticalStackLayout>
</toolkit:Popup>

2.代码 

public partial class BottomListPopup : CommunityToolkit.Maui.Views.Popup
{private Action<int, string> _itemClick;public string Title{set{lbTitle.Text = value;}}public BottomListPopup(List<string> items, Action<int, string> itemClick, int maxShowCount = 7){InitializeComponent();if (items == null || items.Count < 2){throw new ArgumentException("数据应至少两个！");}if (items.Distinct().Count()!=items.Count){throw new ArgumentException("数据不可存在重复项！");}lv.ItemsSource = items;_itemClick = itemClick;if (items.Count > maxShowCount){lv.HeightRequest = maxShowCount * 35;}else{lv.HeightRequest = items.Count * 35;}}private void lv_ItemSelected(object sender, SelectedItemChangedEventArgs e){_itemClick?.Invoke(e.SelectedItemIndex, e.SelectedItem.ToString());Close();}
}

3.使用

BottomListPopup popup = new BottomListPopup(new List<string>() { "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", }, async (index, str) =>{await Toast.Make($"点击中第{index}项，数据为{str}").Show();});this.ShowPopup(popup);

4.效果