[cmake]CMake Error: Could not create named generator Visual Studio 16 2019解决方法

配置flycv时，cmake以下代码会报错第二行的错误，网上解决方法为第三行代码

cmake .. -G "Visual Studio 16 2019 Win64"
CMake Error: Could not create named generator Visual Studio 16 2019
cmake .. -G "Visual Studio 16 2019" -A x64

windows上常用cmake vs命令

Visual Studio 16 2019        = Generates Visual Studio 2019 project files.Use -A option to specify architecture.
Visual Studio 15 2017 [arch] = Generates Visual Studio 2017 project files.Optional [arch] can be "Win64" or "ARM".
Visual Studio 14 2015 [arch] = Generates Visual Studio 2015 project files.Optional [arch] can be "Win64" or "ARM".
Visual Studio 12 2013 [arch] = Generates Visual Studio 2013 project files.Optional [arch] can be "Win64" or "ARM".
Visual Studio 11 2012 [arch] = Generates Visual Studio 2012 project files.Optional [arch] can be "Win64" or "ARM".
Visual Studio 10 2010 [arch] = Generates Visual Studio 2010 project files.Optional [arch] can be "Win64" or "IA64".
Visual Studio 9 2008 [arch]  = Generates Visual Studio 2008 project files.Optional [arch] can be "Win64" or "IA64".

2017 以下的32位：
cmake -G "Visual Studio 15 2017 " ..

2017 以下的64位：
cmake -G "Visual Studio 15 2017  Win64" ..

2019 的64位，默认64位：
cmake -G "Visual Studio 16 2019 "  ..

2019 以下的32位：
cmake -G "Visual Studio 16 2019   -A "Win32" ..