隐者艾伦的技术博客
从github上面下载MixedRealityToolkit-Unity-main案例库，然后试着通过unity打开，报错：
Assets\Data Binding Example\Scripts\DataSourceReflectionListTest.cs(63,17): error CS0246: The type or namespace name ‘DataSourceReflection’ could not be found (are you missing a using directive or an assembly reference?)
unity打开报错，包括不限于：Library\PackageCache\com.microsoft.mixedreality.toolkit.foundation@f2323a9b7aec\SDK\Experimental\NonNativeKeyboard\Scripts\CapsLockHighlight.cs(24,17): error CS0246: The type or namespace name ‘NonNativeKeyboard’ could not be found (are you missing a using directive or an assembly reference?)
unity打包报错，目标文件夹是空的，报错代码如下：
InvalidOperationException: Certificate Assets\WSATestCertificate.pfx is expired and cannot be used for a UWP build. To fix this, either delete it or select a different certificate in the player settings.
PostProcessWinRT.CreateTestCertificate () (at C:/buildslave/unity/build/PlatformDependent/MetroPlayer/Extensions/Managed/PostProcessWinRT.cs:1078)
PostProcessWinRT.Process () (at C:/buildslave/unity/build/PlatformDependent/MetroPlayer/Extensions/Managed/PostProcessWinRT.cs:168)
UnityEditor.UWP.BuildPostprocessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args) (at C:/buildslave/unity/build/PlatformDependent/MetroPlayer/Extensions/Managed/ExtensionModule.cs:86)
Rethrow as BuildFailedException: Exception of type ‘UnityEditor.Build.BuildFailedException’ was thrown.
分析以后应该是这个项目的WSA证书过期了。解决办法：
There might be a better way, but so far I’ve found that you can do this, and you can try other ways.
Goal: In UNITY, after clicking a button, three screens (or Raw images) appear in sequence: the first screen appears 1 second later, the second screen appears 3 seconds later and the first screen disappears, and the third screen appears 3 seconds later and the second screen disappears. The first step is to create a C# script in Assets, let’s name it delaydisplay3, double-click visual studio to open the edit.
本人学习了一下的小白写法，可能有更好的方式，但是目前我发现可以这么做，大家也可以试试其他方法。
目标：在UNITY中，点击按钮后，有三个界面（或Raw image）依次显示：第一个界面延迟1秒出现，第二个界面延迟3秒出现且第一个界面消失，第三个界面再延迟3秒出现且第二个界面消失。
首先是在Assets里面新建一个C#脚本，我们就命名为delaydisplay3吧，双击打开visual studio进行编辑。