CefInitialize崩溃 && Cef白屏

新建一个MFC Dialog工程，然后仿照CefSimple模仿实现自己的一个基于MFC窗口的Demo（具体代码稍后上），注意我仅仅只配置了所需要依赖的lib，并没有把CefSample的配置一起Copy，所以才导致后面的白屏，浪费了我一天时间。
坑一：CefInitialize崩溃
也许这个坑很多网友都遇到过，所以寻找度娘的时候问题很快就解决了，就是exe运行环境缺少必须要的资源包（不仅仅dll，所以图方便我们直接从CefSimple环境拷贝出来）。

坑二：Cef白屏
当出现白屏的时候我第一反应就是代码有bug，于是我从MFC工程切换到win32工程，从子窗口切换到Popup，各种尝试都不行，最后我把CefSimple整个工程拷贝过来，然后按照我的配置修改编译依旧白屏，此刻问题基本确定：工程配置不对。但是工程配置有什么不对呢？只能一点点的比较，终于在最后发现：后期生成事件没有配置。命令如下：

setlocal
mt.exe -nologo -manifest "H:/cef/cef_binary_3.3538.1852.gcb937fc_windows64/tests/cefsimple/cefsimple.exe.manifest" "H:/cef/cef_binary_3.3538.1852.gcb937fc_windows64/tests/cefsimple/compatibility.manifest" -outputresource:"E:/project/CefDemo/x64/Debug/cefsimple.exe";#1
if %errorlevel% neq 0 goto :cmEnd
:cmEnd
endlocal & call :cmErrorLevel %errorlevel% & goto :cmDone
:cmErrorLevel
exit /b %1
:cmDone
if %errorlevel% neq 0 goto :VCEnd
setlocal
"D:\Program Files\CMake\bin\cmake.exe" -E copy_if_different H:/cef/cef_binary_3.3538.1852.gcb937fc_windows64/Debug/chrome_elf.dll E:/project/CefDemo/x64/Debug/chrome_elf.dll
if %errorlevel% neq 0 goto :cmEnd
:cmEnd
endlocal & call :cmErrorLevel %errorlevel% & goto :cmDone
:cmErrorLevel
exit /b %1
:cmDone
if %errorlevel% neq 0 goto :VCEnd
setlocal
"D:\Program Files\CMake\bin\cmake.exe" -E copy_if_different H:/cef/cef_binary_3.3538.1852.gcb937fc_windows64/Debug/d3dcompiler_43.dll E:/project/CefDemo/x64/Debug/d3dcompiler_43.dll
if %errorlevel% neq 0 goto :cmEnd
:cmEnd
endlocal & call :cmErrorLevel %errorlevel% & goto :cmDone
:cmErrorLevel
exit /b %1
:cmDone
if %errorlevel% neq 0 goto :VCEnd
setlocal
"D:\Program Files\CMake\bin\cmake.exe" -E copy_if_different H:/cef/cef_binary_3.3538.1852.gcb937fc_windows64/Debug/d3dcompiler_47.dll E:/project/CefDemo/x64/Debug/d3dcompiler_47.dll
if %errorlevel% neq 0 goto :cmEnd
:cmEnd
endlocal & call :cmErrorLevel %errorlevel% & goto :cmDone
:cmErrorLevel
exit /b %1
:cmDone
if %errorlevel% neq 0 goto :VCEnd
setlocal
"D:\Program Files\CMake\bin\cmake.exe" -E copy_if_different H:/cef/cef_binary_3.3538.1852.gcb937fc_windows64/Debug/libcef.dll E:/project/CefDemo/x64/Debug/libcef.dll
if %errorlevel% neq 0 goto :cmEnd
:cmEnd
endlocal & call :cmErrorLevel %errorlevel% & goto :cmDone
:cmErrorLevel
exit /b %1
:cmDone
if %errorlevel% neq 0 goto :VCEnd
setlocal
"D:\Program Files\CMake\bin\cmake.exe" -E copy_if_different H:/cef/cef_binary_3.3538.1852.gcb937fc_windows64/Debug/libEGL.dll E:/project/CefDemo/x64/Debug/libEGL.dll
if %errorlevel% neq 0 goto :cmEnd
:cmEnd
endlocal & call :cmErrorLevel %errorlevel% & goto :cmDone
:cmErrorLevel
exit /b %1
:cmDone
if %errorlevel% neq 0 goto :VCEnd
setlocal
"D:\Program Files\CMake\bin\cmake.exe" -E copy_if_different H:/cef/cef_binary_3.3538.1852.gcb937fc_windows64/Debug/libGLESv2.dll E:/project/CefDemo/x64/Debug/libGLESv2.dll
if %errorlevel% neq 0 goto :cmEnd
:cmEnd
endlocal & call :cmErrorLevel %errorlevel% & goto :cmDone
:cmErrorLevel
exit /b %1
:cmDone
if %errorlevel% neq 0 goto :VCEnd
setlocal
"D:\Program Files\CMake\bin\cmake.exe" -E copy_if_different H:/cef/cef_binary_3.3538.1852.gcb937fc_windows64/Debug/natives_blob.bin E:/project/CefDemo/x64/Debug/natives_blob.bin
if %errorlevel% neq 0 goto :cmEnd
:cmEnd
endlocal & call :cmErrorLevel %errorlevel% & goto :cmDone
:cmErrorLevel
exit /b %1
:cmDone
if %errorlevel% neq 0 goto :VCEnd
setlocal
"D:\Program Files\CMake\bin\cmake.exe" -E copy_if_different H:/cef/cef_binary_3.3538.1852.gcb937fc_windows64/Debug/snapshot_blob.bin E:/project/CefDemo/x64/Debug/snapshot_blob.bin
if %errorlevel% neq 0 goto :cmEnd
:cmEnd
endlocal & call :cmErrorLevel %errorlevel% & goto :cmDone
:cmErrorLevel
exit /b %1
:cmDone
if %errorlevel% neq 0 goto :VCEnd
setlocal
"D:\Program Files\CMake\bin\cmake.exe" -E copy_if_different H:/cef/cef_binary_3.3538.1852.gcb937fc_windows64/Debug/v8_context_snapshot.bin E:/project/CefDemo/x64/Debug/v8_context_snapshot.bin
if %errorlevel% neq 0 goto :cmEnd
:cmEnd
endlocal & call :cmErrorLevel %errorlevel% & goto :cmDone
:cmErrorLevel
exit /b %1
:cmDone
if %errorlevel% neq 0 goto :VCEnd
setlocal
"D:\Program Files\CMake\bin\cmake.exe" -E copy_directory H:/cef/cef_binary_3.3538.1852.gcb937fc_windows64/Debug/swiftshader E:/project/CefDemo/x64/Debug/swiftshader
if %errorlevel% neq 0 goto :cmEnd
:cmEnd
endlocal & call :cmErrorLevel %errorlevel% & goto :cmDone
:cmErrorLevel
exit /b %1
:cmDone
if %errorlevel% neq 0 goto :VCEnd
setlocal
"D:\Program Files\CMake\bin\cmake.exe" -E copy_if_different H:/cef/cef_binary_3.3538.1852.gcb937fc_windows64/Resources/cef.pak E:/project/CefDemo/x64/Debug/cef.pak
if %errorlevel% neq 0 goto :cmEnd
:cmEnd
endlocal & call :cmErrorLevel %errorlevel% & goto :cmDone
:cmErrorLevel
exit /b %1
:cmDone
if %errorlevel% neq 0 goto :VCEnd
setlocal
"D:\Program Files\CMake\bin\cmake.exe" -E copy_if_different H:/cef/cef_binary_3.3538.1852.gcb937fc_windows64/Resources/cef_100_percent.pak E:/project/CefDemo/x64/Debug/cef_100_percent.pak
if %errorlevel% neq 0 goto :cmEnd
:cmEnd
endlocal & call :cmErrorLevel %errorlevel% & goto :cmDone
:cmErrorLevel
exit /b %1
:cmDone
if %errorlevel% neq 0 goto :VCEnd
setlocal
"D:\Program Files\CMake\bin\cmake.exe" -E copy_if_different H:/cef/cef_binary_3.3538.1852.gcb937fc_windows64/Resources/cef_200_percent.pak E:/project/CefDemo/x64/Debug/cef_200_percent.pak
if %errorlevel% neq 0 goto :cmEnd
:cmEnd
endlocal & call :cmErrorLevel %errorlevel% & goto :cmDone
:cmErrorLevel
exit /b %1
:cmDone
if %errorlevel% neq 0 goto :VCEnd
setlocal
"D:\Program Files\CMake\bin\cmake.exe" -E copy_if_different H:/cef/cef_binary_3.3538.1852.gcb937fc_windows64/Resources/cef_extensions.pak E:/project/CefDemo/x64/Debug/cef_extensions.pak
if %errorlevel% neq 0 goto :cmEnd
:cmEnd
endlocal & call :cmErrorLevel %errorlevel% & goto :cmDone
:cmErrorLevel
exit /b %1
:cmDone
if %errorlevel% neq 0 goto :VCEnd
setlocal
"D:\Program Files\CMake\bin\cmake.exe" -E copy_if_different H:/cef/cef_binary_3.3538.1852.gcb937fc_windows64/Resources/devtools_resources.pak E:/project/CefDemo/x64/Debug/devtools_resources.pak
if %errorlevel% neq 0 goto :cmEnd
:cmEnd
endlocal & call :cmErrorLevel %errorlevel% & goto :cmDone
:cmErrorLevel
exit /b %1
:cmDone
if %errorlevel% neq 0 goto :VCEnd
setlocal
"D:\Program Files\CMake\bin\cmake.exe" -E copy_if_different H:/cef/cef_binary_3.3538.1852.gcb937fc_windows64/Resources/icudtl.dat E:/project/CefDemo/x64/Debug/icudtl.dat
if %errorlevel% neq 0 goto :cmEnd
:cmEnd
endlocal & call :cmErrorLevel %errorlevel% & goto :cmDone
:cmErrorLevel
exit /b %1
:cmDone
if %errorlevel% neq 0 goto :VCEnd
setlocal
"D:\Program Files\CMake\bin\cmake.exe" -E copy_directory H:/cef/cef_binary_3.3538.1852.gcb937fc_windows64/Resources/locales E:/project/CefDemo/x64/Debug/locales
if %errorlevel% neq 0 goto :cmEnd
:cmEnd
endlocal & call :cmErrorLevel %errorlevel% & goto :cmDone
:cmErrorLevel
exit /b %1
:cmDone
if %errorlevel% neq 0 goto :VCEnd

上面命令主要实现两个功能：
1.将manifest 文件嵌入到exe内部。
2.将所依赖的文件copy到运行环境(所以如果配置了这个生成后事件，那么问题一就不需要手动拷贝依赖项了)。

manifest 文件学习参考：

1. 什么是vs 程序的manifest文件
2. exe或者dll 嵌入manifest文件方法
3. VS2008 manifest文件简单应用

所以白屏的根本原因是缺少manifest文件，导致运行的时候出问题。
解决方法两种：

1. 把上面的代码完整Copy到生成后事件里面去【记得修改自己的工程目录】
2. 如果之前已经把必要的文件和资源Copy到了运行环境，那么我们只需要Copy如下一段代码就OK啦（功能就是把manifest文件嵌入exe内部）【记得修改自己的工程目录】：

setlocal
mt.exe -nologo -manifest "H:/cef/cef_binary_3.3538.1852.gcb937fc_windows64/tests/cefsimple/cefsimple.exe.manifest" "H:/cef/cef_binary_3.3538.1852.gcb937fc_windows64/tests/cefsimple/compatibility.manifest" -outputresource:"E:/project/CefDemo/x64/Debug/cefsimple.exe";#1
if %errorlevel% neq 0 goto :cmEnd
:cmEnd
endlocal & call :cmErrorLevel %errorlevel% & goto :cmDone
:cmErrorLevel
exit /b %1
:cmDone
if %errorlevel% neq 0 goto :VCEnd

下一章节将描述如何把Cef作为一个子窗口集成到MFC工程和win32工程。