ListView Invalid with ElementNameSubject binding

[HaoLife]

<Page
    x:Class="UnoControlsSample.Shared.Controls.CommandBarPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:UnoControlsSample.Shared.Controls"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:ios="http://uno.ui/ios"
    xmlns:android="http://uno.ui/android"
    xmlns:xamarin="http://uno.ui/xamarin"
    mc:Ignorable="d ios android xamarin"
    x:Name="CurrentPage"
    Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">

    <ListView Grid.Row="1" x:Name="recipes"  ItemsSource="{x:Bind Users}" Padding="5" Margin="0,20,0,0" 
                HorizontalContentAlignment="Stretch" 
                SelectionMode="None"
                IsItemClickEnabled="True" 
                >
        <ListView.ItemContainerStyle>
            <Style TargetType="ListViewItem">
                <Setter Property="HorizontalContentAlignment" Value="Stretch" />
                <Setter Property="Padding" Value="0" />
                <Setter Property="Margin" Value="0" />
            </Style>
        </ListView.ItemContainerStyle>
        <ListView.ItemTemplate>
            <DataTemplate>
                <Button  Margin="0,5" Content="test command"  Command="{Binding DataContext.TestCommand,ElementName=CurrentPage}"/>
            </DataTemplate>
        </ListView.ItemTemplate>
    </ListView>
</Page>

I'm submitting a...

Using {Binding DataContext.TestCommand,ElementName=CurrentPage} in ListView is not recognized and can take effect in Android and UWP

Current behavior

Expected behavior

Minimal reproduction of the problem with instructions

Environment

Nuget Package: 

Package Version(s): 

Affected platform(s):
- [x] iOS
- [ ] Android
- [ ] WebAssembly
- [ ] Windows
- [ ] Build tasks

Visual Studio
- [x] 2017 (version: )
- [ ] 2017 Preview (version: )
- [ ] for Mac (version: )

Relevant plugins
- [ ] Resharper (version: )

[HaoLife]

@jeromelaban External members are bound in ListView, and member bindings outside ListView cannot be used in IOS as long as they are in ListView. Can we follow up on this issue?

Example

        <TextBlock x:Name="title" Text="testing" />

        <ListView ItemsSource="{Binding Tests}" >
            <ListView.ItemTemplate>
                <DataTemplate>
                    <StackPanel>
                        <TextBlock Text="{Binding Text,ElementName=title}" />
                    </StackPanel>
                </DataTemplate>
            </ListView.ItemTemplate>
        </ListView>

[HaoLife]

NameScope.FindInNamescopes

ListViewItem can't find the upper object after reloading parent.GetParent (), but can't find the bound object after reloading.

[HaoLife]

@jeromelaban The reason is that the Parent object is not a DependencyObject object, and the object first loaded is Windows.UI.Xaml.Controls.BlockLayout and then loaded again into the UIKit.UIView object.

[davidjohnoliver]

fixed by #1064