Various pits of vs2017 QT

problem ：

1. The object is not applied to the instance of the object
2. qt The plug-in is unloaded and reinstalled , Failure
3. moc.... Compile not pass

.....

qt The plug-in is installed in two folders
C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\Common7\IDE\Extensions
Remember backup

C:\Users\JC\AppData\Local\Microsoft\VisualStudio\15.0_3349af49\Extensions
Empty these two folders

open
vs Developer command
perform devenv.exe /setup /resetuserdata /resetsettings /ResetSkipPkgs

Restart the computer

Re install qt plug-in unit

success

moc.... The problem of compilation failure

Change to the default option here first preservation
Then to msvc2017_64 preservation
Compile and pass