This application failed to start because it could not find or load the Qt platform plugin “xcb”解决方法

1.This application failed to start because it could not find or load the Qt platform plugin “xcb”

The correct solution is running the following comand onto a terminal:

sudo ln -sf /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/ /usr/bin/

It creates the symbolic link it's missed.

2.软件打包后无法运行，单独运行提示XCB错误
解决方法：拷贝qt.conf 到/usr/bin目录里面

qt.conf内容如下

[Paths]
Prefix=../lib/Qt
Binaries=bin
Libraries=lib
Plugins=/usr/3rdparty/qt/plugins
Imports=imports
Qml2Imports=qml