【使用pyside2遇到的问题】This application failed to start because no Qt platform plugin could be initialized.

项目场景：

安装使用pyside2时遇到的问题:
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

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问题描述

This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

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原因分析：

问题是:缺少必要的dll文件,我们给它添加一个系统环境变量就可以.

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解决方案：

1.找到安装pyside2的位置,可以通过在Anaconda prompt的当前python环境中输 pip show pyside2

2.找到Location所在文件下的pkugins/platforms,并复制该路径

3.win+r 输入sysdm.cpl

高级–环境变量

新建(w)

变量名QT_QPA_PLATFORM_PLUGIN_PATH

变量值D:\anaconda3\conda\envs\PyTorch\Lib\site-packages\PySide2\plugins\platforms (刚刚复制的路径,每个人都不一样)

然后一路确定确定确定就可以了

最后重启电脑,就已经ok啦