Xamarin Telerik RadListView安卓正常iOS端无绑定数据如何解决

你遇到的RadListView iOS端不显示条目是Telerik UI for Xamarin在iOS平台的常见适配问题，按以下步骤修改即可： #

问题根因 #

Telerik RadListView在iOS端的布局渲染逻辑比Android严格，未显式声明布局规则、缺少iOS端组件初始化都会导致条目不渲染。

修复步骤 #

1. 给XAML中的RadListView添加显式的3列网格布局定义，同时指定单元格高度避免iOS端自动计算失效，修改后的XAML代码如下：

<telerikDataControls:RadListView Grid.Row="2" x:Name="Locations" ItemsSource="{Binding CurrentLocationList}" 
                                 VerticalScrollBarVisibility="Always" VerticalOptions="FillAndExpand" ItemTapped="Locations_ItemTapped" BackgroundColor="Aqua">
    <!-- 新增这部分布局定义，Span设为3对应你要的3列展示 -->
    <telerikDataControls:RadListView.LayoutDefinition>
        <telerikListView:ListViewGridLayout Span="3" ItemLength="60" IsItemLengthFixed="False"/>
    </telerikDataControls:RadListView.LayoutDefinition>
    <telerikDataControls:RadListView.ItemTemplate>
        <DataTemplate>
            <telerikListView:ListViewTemplateCell>
                <telerikListView:ListViewTemplateCell.View>
                    <StackLayout Orientation="Horizontal" Margin="5,5,5,5">
                        <Label Text="{Binding Name}" FontSize="20" VerticalOptions="Center" />
                        <Label Text="{Binding Id}" HorizontalOptions="EndAndExpand" FontSize="20" VerticalOptions="Center" />
                        <local:GrayRadioButton x:Name="rbtSelectedLocation" IsChecked="{Binding Selected}" GroupName="grpLocation" />
                    </StackLayout>
                </telerikListView:ListViewTemplateCell.View>
            </telerikListView:ListViewTemplateCell>
        </DataTemplate>
    </telerikDataControls:RadListView.ItemTemplate>
</telerikDataControls:RadListView>

2. 检查iOS项目AppDelegate.cs的FinishedLaunching方法，确保在加载Xamarin Forms之前已经初始化Telerik组件，添加以下代码：

Telerik.XamarinForms.Common.iOS.TelerikForms.Init();
global::Xamarin.Forms.Forms.Init();
LoadApplication(new App());

效果参考 #

• Android端正常运行效果：
  
• 修复前iOS端异常效果：
  

内容的提问来源于stack exchange，提问作者Cef