无法找到或加载Qt平台插件“ windows”， [英] Could not find or load the Qt platform plugin "windows"

问题描述

首先，为了防止重复的报告，我尝试了给出此处，此处，此处， 此处和此处。

First of all, to prevent duplicate reports I have tried multiple solutions given here, here, here, here and here.

我在Visual Studio 2012中使用Qt 5.5.1，并在Windows 10 x64上开发了我的应用程序（不使用Qt Creator）。应用程序是在发布模式下编译的。

I am using Qt 5.5.1 with Visual Studio 2012 and developed my app on Windows 10 x64 (not using Qt Creator). Application is compiled in release mode.

实际上，我的应用程序在PC上正在运行，没有任何问题，并且是我唯一需要的库目录是：

Actually, my application is working on my PC, without any issues and the only libraries I need in my directory are:

Qt5Core.dll
Qt5Gui.dll
Qt5WinExtras.dll
Qt5Widgets.dll
Qt5Network.dll
msvcp110.dll
msvcr110.dll

现在，当我尝试在Windows 7 x86的全新安装上启动应用程序时，出现以下错误消息：

Now, when I try to launch my application on fresh installation of Windows 7 x86 I am getting the following error message:

此应用程序失败

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

重新安装该应用程序可能会解决此问题。

Reinstalling the application may fix this problem.

现在我不能摆脱它。根据前面的问题，可能是 qwindows.dll 文件的问题（或更确切地说，应用程序找不到它），首先我进行了一个部署我的发布目录是这样的：

Now I can't get rid of it. According to the previously asked questions it can be a issue with qwindows.dll file (or more precisely with application couldn't locate it), first of all I made a deploy of my release directory like this:

[..] \msvc2012\bin> windeployqt.exe< PATH>

它已生成启动我的应用程序所需的所有文件，包括 platforms / qwindows.dll 所以我只是将它们全部复制到Windows 7目录中而没有任何作用-仍然会发生错误。

It has generated all files that are needed for my application to launch, including platforms/qwindows.dll so I have simply copied all of them to Windows 7 directory without any effect - error still occurs.

我还尝试了手动复制 qwindows .dll 来自 msvc2012\plugins\平台-无效，

I have also tried to manually copy a qwindows.dll from the msvc2012\plugins\platforms - no effect,

我所做的最后一步是检查 Dependency Walker 中的应用程序-令人惊讶的是，没有 qwindows.dll 相关依赖项：

Last step I did was a inspection of my application in the Dependency Walker - suprisingly, there is no qwindows.dll related dependency:

图片

所以我现在没主意了，这里出了什么问题？

So I am out of ideas now, what is the problem here?

推荐答案

这是我在 QOwnNotes （Qt5）下部署的工作Windows： https://github.com/pbek/QOwnNotes/blob/develop/appveyor .yml

This is what I do to deploy QOwnNotes (Qt5) under Windows: https://github.com/pbek/QOwnNotes/blob/develop/appveyor.yml

# AppVeyor build configuration
# http://www.appveyor.com/docs/build-configuration
os: unstable
skip_tags: true

install:
- set QTDIR=C:\Qt\5.5\mingw492_32
- set PATH=%PATH%;%QTDIR%\bin;C:\MinGW\bin
- set RELEASE_PATH=appveyor\release

before_build:
# getting submodules
- git submodule update --init

build_script:
# using a header file without MemoryBarrier, that causes the build to fail
- copy appveyor\qopenglversionfunctions.h %QTDIR%\include\QtGui
# workaround for MinGW bug
- sed -i s/_hypot/hypot/g c:\mingw\include\math.h
- cd src
# we need to modify that to make it running on AppVeyor
- sed -i "s/CONFIG += c++11/QMAKE_CXXFLAGS += -std=gnu++0x/g" QOwnNotes.pro
- "echo #define RELEASE \"AppVeyor\" > release.h"
# setting the build number in the header file
- "echo #define BUILD %APPVEYOR_BUILD_NUMBER% > build_number.h"
- qmake QOwnNotes.pro -r -spec win32-g++
#  - qmake QOwnNotes.pro -r -spec win32-g++ "CONFIG+=debug"
- mingw32-make
# creating the release path
- md ..\%RELEASE_PATH%
# copy the binary to our release path
- copy release\QOwnNotes.exe ..\%RELEASE_PATH%
# copy OpenSSL DLLs to the release path
- copy ..\appveyor\OpenSSL\libeay32.dll ..\%RELEASE_PATH%
- copy ..\appveyor\OpenSSL\libssl32.dll ..\%RELEASE_PATH%
- copy ..\appveyor\OpenSSL\ssleay32.dll ..\%RELEASE_PATH%
# copy portable mode launcher to the release path
- copy ..\appveyor\QOwnNotesPortable.bat ..\%RELEASE_PATH%
# copy translation files
- copy languages\*.qm ..\%RELEASE_PATH%
- cd ..\%RELEASE_PATH%
# fetching dependencies of QT app
# http://doc.qt.io/qt-5/windows-deployment.html
- windeployqt --release QOwnNotes.exe
# this dll was missed by windeployqt
- copy ..\libwinpthread-1.dll . /y
# this dll didn't work when released by windeployqt
- copy "..\libstdc++-6.dll" . /y
# for some reason AppVeyor or windeployqt uses a copy of the German
# translation file as English one, which screws up the English user interface
- del "translations\qt_en.qm"

artifacts:
# pushing entire folder as a zip archive
- path: appveyor\release
    name: QOwnNotes

deploy:
# Deploy to GitHub Releases
- provider: GitHub
    artifact: QOwnNotes
    draft: false
    prerelease: false
    auth_token:
    secure: spcyN/Dz3B2GXBPii8IywDLq6vfxC1SrN+xR2wMerFM7g2nTy0Lrh5agQONFoInR
    on:
    branch: master

notifications:
# Gitter webhook
- provider: Webhook
    url: https://webhooks.gitter.im/e/b6ef22402eb4af50f73a
    on_build_success: true
    on_build_failure: true
    on_build_status_changed: false

我希望能有所帮助...

I hope that helps a little...

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