20210103:增加安卓后退按键

wei

2021-01-04 5c25f9546d0954befb202910540a5ac59af1adfe

 HDL-ON_iOS/HDL-ON_iOS.csproj

@@ -90,7 +90,7 @@
        </Reference>
    </ItemGroup>
    <ItemGroup>
      <PackageReference Include="Xamarin.Essentials" Version="1.5.3.2" />
      <PackageReference Include="Xamarin.Essentials" Version="1.6.0" />
      <PackageReference Include="Newtonsoft.Json">
        <Version>12.0.3</Version>
      </PackageReference>