UWP Flyout浮动控件

看见没，点击“Options”按钮，浮动出来一个界面，这个界面可以用xaml自定义。

如果要点击的控件又Flyout属性那么，可以直接按照下面用

<Button Content="Click me">
  <Button.Flyout>
     <Flyout>
        <TextBlock Text="This is a flyout!"/>
     </Flyout>
  </Button.Flyout>
</Button>

如果没有的话，也不要慌

<Image Source="Assets/cliff.jpg" Width="50" Height="50"
  Margin="10" Tapped="Image_Tapped">
  <FlyoutBase.AttachedFlyout>
    <Flyout>
      <TextBlock Text="This is some text in a flyout."  />
    </Flyout>        
  </FlyoutBase.AttachedFlyout>
</Image>


private void Image_Tapped(object sender, TappedRoutedEventArgs e)
{
    FlyoutBase.ShowAttachedFlyout((FrameworkElement)sender);
}

很简单吧，其实我今天遇到的问题是，在Flyout中有一个Textbox，在浮动出来后，不能获取焦点，来输入文字。。。。。。

            <AppBarButton Icon="AllApps" Label="Flyout" Click="Btn_SignInSettings_Click">
                <FlyoutBase.AttachedFlyout>
                    <Flyout x:Name="flyoutSignInSettings">
                        <Grid Canvas.ZIndex="999">
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition/>
                                <ColumnDefinition/>
                            </Grid.ColumnDefinitions>
                            <Grid.RowDefinitions>
                                <RowDefinition/>
                                <RowDefinition/>
                                <RowDefinition/>
                            </Grid.RowDefinitions>
                            <TextBlock Text="SignInItemName" x:Uid="textblockSignInItemName" VerticalAlignment="Center"/>
                            <TextBox Grid.Column="1" BorderThickness="1" Margin="6,0,0,6" x:Name="textboxSignInItemName" x:Uid="textboxSignInItemName"/>
                            <TextBlock Grid.Row="1" Text="SignInItemTimes" x:Uid="textblockSignInItemTimes" VerticalAlignment="Center"/>
                            <TextBox Grid.Row="1" Grid.Column="1" BorderThickness="1" Margin="6,0,0,6" x:Name="textboxSignInItemTimes" x:Uid="textboxSignInItemTimes"/>
                            <Button Grid.Row="2" Grid.ColumnSpan="2" x:Uid="Button_OK" Content="OK" HorizontalAlignment="Stretch" Click="Btn_SignInSettingsSubmit_Click"/>
                        </Grid>
                    </Flyout>
                </FlyoutBase.AttachedFlyout>
            </AppBarButton>