跨平台本机插件是Unity的真正跨平台工具，它提供了访问移动平台上本机功能的独特统一方式。插件支持移动平台iOS（v9.0及更高版本），Android（API 14及更高版本）。
Unity官方 | Cross Platform Native Plugins – Ultra Pack | 文件大小：64 MB | 文件数量：868
Cross Platform Native v1.5.6p2更新日志：
2018年10月31日
If you are upgrading from 1.5.6, no need to uninstall the plugin. Else, Uninstall and Import
IMPORTANT : Please click on “Save” in NPSettings once you import the plugin to make sure it refreshes with your data.
[Android] Fix for mime type while sharing
[Android] Proguard setup with a single click from NPSettings -> Application-> Enable Proguard Setup Settings
[iOS]Webview destroy crash issue
[iOS]Compilation fix when RateApp is not enabled
