英文:
.NET MAUI on iOS: Image is not displayed in the list cell
问题
在我的移动应用程序中，声明了一个带有图像的列表：
<ListView ItemsSource="{Binding PhotosCollection}"
SelectionMode="Single"
VerticalOptions="FillAndExpand"
SelectedItem="{Binding SelectedPhotoDocument}">
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell>
<Grid Margin="4">
<Grid.RowDefinitions>
<RowDefinition Height="64" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Image Grid.RowSpan="2"
Grid.Column="0"
Source="{Binding ThumbnailImageSource}"
HorizontalOptions="Start"
VerticalOptions="Center"
Aspect="AspectFit" />
<Label Grid.Column="1"
Grid.RowSpan="2"
Text="{Binding Description}"
FontAttributes="Bold"
HorizontalOptions="Start"
VerticalOptions="Center"
HorizontalTextAlignment="Start"
VerticalTextAlignment="Center" />
</Grid>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
这个列表在Android平台上运行正常，并显示图像和描述。但在iOS平台上缩略图没有显示，只显示描述。
如何解决这个问题？
英文:
In my mobile application, there's declared a list with images:
<ListView ItemsSource="{Binding PhotosCollection}"
SelectionMode="Single"
VerticalOptions="FillAndExpand"
SelectedItem="{Binding SelectedPhotoDocument}">
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell>
<Grid Margin="4">
<Grid.RowDefinitions>
<RowDefinition Height="64" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Image Grid.RowSpan="2"
Grid.Column="0"
Source="{Binding ThumbnailImageSource}"
HorizontalOptions="Start"
VerticalOptions="Center"
Aspect="AspectFit" />
<Label Grid.Column="1"
Grid.RowSpan="2"
Text="{Binding Description}"
FontAttributes="Bold"
HorizontalOptions="Start"
VerticalOptions="Center"
HorizontalTextAlignment="Start"
VerticalTextAlignment="Center" />
</Grid>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
This list works perfectly on Android platform and displays images along with descriptions. But on iOS platform thumbnails are not being displayed. Only descriptions are shown.
How can I overcome this issue?
答案1
得分: 0
为了解决这个问题，使移动应用在iOS和Android上正常工作，我在ListView的数据模板声明中使用了ImageCell而不是Image和Label标记。
<ListView
ItemsSource="{Binding PhotosCollection}"
SelectionMode="Single"
VerticalOptions="FillAndExpand"
SelectedItem="{Binding SelectedPhotoDocument}">
<ListView.ItemTemplate>
<DataTemplate>
<ImageCell
ImageSource="{Binding ThumbnailImageSource}"
Text="{Binding Description}" />
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
英文:
To fix this issue to get mobile app working as well as on iOS and on Android, I used ImageCell instead of Image and Label tags in the ListView data template declaration.
<ListView
ItemsSource="{Binding PhotosCollection}"
SelectionMode="Single"
VerticalOptions="FillAndExpand"
SelectedItem="{Binding SelectedPhotoDocument}">
<ListView.ItemTemplate>
<DataTemplate>
<ImageCell
ImageSource="{Binding ThumbnailImageSource}"
Text="{Binding Description}" />
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
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