Python3.8.3 Qt Designer 提示This application failed to start because no qt platform plugin could be
全部uninstallpython3.8.3再重装还是不行,终于找到办法,参考:https://blog.csdn.net/calmreason/article/details/104851565我的python安装在e:\python3.8,把E:\Python3.8\Lib\site-packages\pyqt5_tools\Qt\bin\platforms这个目录里的qwindows.dll