Activityindicator不适用于FFImageLoading

Question

该代码适用于普通，但不适用于FFImageLoading。ActivityIndicator未显示。。。我做错了什么？

<ContentPage.Content>
<StackLayout>
<local:PinchPanContainer>
<local:PinchPanContainer.Content HorizontalOptions="FillAndExpand" VerticalOptions="FillAndExpand">
<ffimageloading:CachedImage RetryCount="5" RetryDelay="1" CacheDuration="1" x:Name="MyImage" HorizontalOptions="Fill" VerticalOptions="CenterAndExpand" DownsampleToViewSize="False"></ffimageloading:CachedImage>
</local:PinchPanContainer.Content>
</local:PinchPanContainer>
<ActivityIndicator BindingContext="{x:Reference MyImage}" IsRunning="{Binding CachedImage.IsLoading}"  IsVisible="{Binding CachedImage.IsLoading}"/>
</StackLayout>
</ContentPage.Content>

Answer 1

您使用的绑定路径不正确，应该是IsLoading而不是CachedImage.IsLoading:

<StackLayout>
<ffimageloading:CachedImage Source="http://img1.wikia.nocookie.net/__cb20101219155130/uncyclopedia/images/7/70/Facebooklogin.png" LoadingDelay="2000" RetryCount="5" RetryDelay="1" CacheDuration="1" x:Name="MyImage" HorizontalOptions="Fill" VerticalOptions="CenterAndExpand" DownsampleToViewSize="False"></ffimageloading:CachedImage>
<ActivityIndicator BindingContext="{x:Reference MyImage}" Color="Red" IsRunning="{Binding IsLoading}"  IsVisible="{Binding IsLoading}"/>
</StackLayout>

参考：数据绑定基础