Hyphenate.iOS.UI NuGet Package

Xamarin Binding for Hyphenate EaseUI 3.5.3
架构支持x86_64 arm64

- 添加NullAllowed修饰
- 解决一些对象无法转换为协议的问题
- 添加WeakDataSource

Note:
解决iPhone真机无法编译调试问题
请参考https://github.com/xamarin/xamarin-macios/issues/5624

修改.csproj，添加
<Target Name="BeforeCodesign">
<Exec Condition=" 'AnyCPU' == 'iPhone' Command="\usr\bin\codesign -v --force --sign --timestamp=none //Frameworks/UmbrellaFramework.framework/Frameworks/SubFramework.framework/SubFramework" />
</Target>.