1.引言

    本篇将介绍音频播放页面的设计情况，也希望能将自己的心得与大家分享。

2.设计情况

2.1 总体设计

    XAML页面如下：

 <Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
        <Grid.Resources>
            <cvt:MusicConverter x:Key="MusicPostionConverter"/>
        </Grid.Resources>
        <Grid.RowDefinitions>
            <RowDefinition x:Name="MediaGrid" Height="*"/>
            <RowDefinition x:Name="PlayerPostionGrid" Height="40"/>
            <RowDefinition x:Name="BttnGrid" Height="Auto"/>
        </Grid.RowDefinitions>
        <Border BorderThickness="1">
            <MediaElement x:Name="MediaPlayer" Stretch="Fill" VerticalAlignment="Center" HorizontalAlignment="Center" MediaOpened="MediaPlayer_MediaOpened" MediaEnded="MediaPlayer_MediaEnded" />
        </Border>
        <RelativePanel Grid.Row="1" >
            <Slider x:Name="PlayerPostion" Height="40" VerticalAlignment="Center" RelativePanel.AlignTopWithPanel="True" Value="{Binding ElementName=MediaPlayer,Path=Position, Converter={StaticResource MusicPostionConverter}, Mode=TwoWay}" Minimum="0.0" />
        </RelativePanel>
        <RelativePanel Grid.Row="2">
            <ToggleSwitch x:Name="SwtchMediaRepeat" OffContent="单曲循环" OnContent="顺序循环" HorizontalAlignment="Left"  VerticalAlignment="Center" RelativePanel.AlignLeftWithPanel="True"/>
            <StackPanel Grid.Column="1" HorizontalAlignment="Center" VerticalAlignment="Center" Orientation="Horizontal" RelativePanel.AlignHorizontalCenterWithPanel="True" RelativePanel.AlignVerticalCenterWithPanel="True" >
                <Button x:Name="BttnPrevious" FontFamily="Segoe MDL2 Assets" Content="&#xEDD9;" Click="BttnPrevious_Click"/>
                <Button x:Name="BttnPlay" FontFamily="Segoe MDL2 Assets" Content="&#xEDB4;" Click="BttnPlay_Click"/>
                <Button x:Name="BttnStop" FontFamily="Segoe MDL2 Assets" Content="&#xEDB5;" Click="BttnStop_Click"/>
                <Button x:Name="BttnNext" FontFamily="Segoe MDL2 Assets" Content="&#xEDDA;" Click="BttnNext_Click"/>
            </StackPanel>
            <TextBlock Grid.Column="2" FontFamily="Segoe MDL2 Assets" Text="&#xE953;" HorizontalAlignment="Left"  VerticalAlignment="Center" Tapped="TextBlock_Tapped" RelativePanel.AlignRightWithPanel="True" Margin="0,15,30,0" >
                    <FlyoutBase.AttachedFlyout>
                        <Flyout>
                              <Slider x:Name="SldrVolume" Height="32" HorizontalAlignment="Center" VerticalAlignment="Center" Width="50" ValueChanged="SldrVolume_ValueChanged" Value="50" Minimum="0.