Question

Python安装PyQt5时遇到这个问题该怎么解决

objc[29962]: Class RunLoopModeTracker is implemented in both /Users/apple/Qt5.7.1/5.7/clang_64/lib/QtCore.framework/Versions/5/QtCore (0x100e49dc0) and /Users/apple/anaconda3/lib/libQt5Core.5.6.2.dylib (0x10610f9a8). One of the two will be used. Which one is undefined.

objc[29962]: Class NotificationReceiver is implemented in both /Users/apple/Qt5.7.1/5.7/clang_64/lib/QtWidgets.framework/Versions/5/QtWidgets (0x102358ef0) and /Users/apple/anaconda3/lib/libQt5Widgets.5.6.2.dylib (0x1055c3fb8). One of the two will be used. Which one is undefined.

QObject::moveToThread: Current thread (0x7ffc774f3eb0) is not the object's thread (0x7fffa33c73c0).

Cannot move to target thread (0x7ffc774f3eb0)

You might be loading two sets of Qt binaries into the same process. Check that all plugins are compiled against the right Qt binaries. Export DYLD_PRINT_LIBRARIES=1 and check that only one set of binaries are being loaded.

This application failed to start because it could not find or load the Qt platform plugin "cocoa"

in "".

Answer 1

Linux系统下Qt5编译好的程序在未安装Qt的系统下运行会报以下错误：
This application failed to start because it could not find or load the Qt platform plugin "xcb".

Reinstalling the application may fix this problem.
出现这个错误，主要是因为qt5为了在多平台下更方便移植，使用了一种新的技术-----platform abstraction system (QPA)，而它中的库又依赖于Qt5中的一个库文件libQt5DBus.so.5，所以，只要打包时只要加上这个文件就可以了。
linux下qt5程序打包步骤如下
1、把以下7个库文件放到/usr/lib目录下

libQt5Widgets.so.5
libQt5Gui.so.5
libQt5Core.so.5
libicui18n.so.51
libicuuc.so.51
libicudata.so.51
libQt5DBus.so.5
2、拷贝Qt5安装目录中的platforms目录，使它和你的Qt程序同级目录
现在你可以双击你的程序运行了呵呵