This application failed to start because no Qt platform plugin could be initialized.

最近在编写pyQt的程序，其中QtDesigner.exe在X:\anaconda3\Library\bin里，双击designer.exe会出现如下错误‘This application failed to start because no Qt platform plugin could be initialized.’

解决办法：

在X:\anaconda3\Library\plugins\platforms里将qdirect2d.dll，qminimal.dll，qoffscreen.dll，qwebgl.dll，qwindows.dll这5个dll文件复制到designer.exe文件夹下，然后再双击designer.exe就会出现QtDesigner的对话框了。