1
我正在尝试将3D功能添加到我现有的Qt应用程序中。在我project.pro文件I设置QT变量：模块“Qt3D.Core”未安装
TEMPLATE = subdirs
QT += 3dcore 3drender 3dinput 3dquick qml quick 3dquickextras
SUBDIRS = plugins/datasource \
plugins/screenManager
qml.files = apps modules sysui i18n am-config.yaml Main*.qml
INSTALLS += qml
编辑：我的QML_IMPORT_TRACE环境变量设置为1。现在我明白了，当我尝试运行应用程序如下：
[DBG | default] QQmlImportDatabase::addImportPath: "/usr/lib/x86_64-linux-gnu/qt5/qml" [:0]
[DBG | default] QQmlImportDatabase::addImportPath: "/usr/local/Qt-5.7.0/include" [:0]
[DBG | default] QQmlImportDatabase::addImportPath: "/usr/local/bin" [:0]
[DBG | default] QQmlImportDatabase::setImportPathList: ("/usr/local/bin", "/usr/local/Qt-5.7.0/include", "/usr/lib/x86_64-linux-gnu/qt5/qml", "/home/aras/Projects/UI/imports/shared", "/home/aras/Projects/UI/imports/system") [:0]
[CRIT | am.system] WARNING: could not register service org.freedesktop.Notifications on D-Bus (unix:abstract=/tmp/dbus-c9i1pNpEVT): [:0]
[DBG | default] QQmlImports(file:///home/aras/Projects/UI/Main.qml)::addLibraryImport: "QtQuick" 2.5 as "QQ2" [:0]
[DBG | default] QQmlImports(file:///home/aras/Projects/UI/Main.qml)::importExtension: loaded "/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick.2/qmldir" [:0]
[DBG | default] QQmlImportDatabase::registerPluginTypes: "QtQuick" from "/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick.2" [:0]
[DBG | default] QQmlImports(file:///home/aras/Projects/UI/Main.qml)::addLibraryImport: "QtQuick.Window" 2.2 as "" [:0]
[DBG | default] QQmlImports(file:///home/aras/Projects/UI/Main.qml)::importExtension: loaded "/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Window.2/qmldir" [:0]
[DBG | default] QQmlImportDatabase::registerPluginTypes: "QtQuick.Window" from "/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Window.2" [:0]
[DBG | default] QQmlImports(file:///home/aras/Projects/UI/Main.qml)::addFileImport: "sysui" -1.-1 as "" [:0]
[DBG | default] QQmlImports(file:///home/aras/Projects/UI/Main.qml)::addLibraryImport: "controls" 1.0 as "" [:0]
[DBG | default] QQmlImports(file:///home/aras/Projects/UI/Main.qml)::importExtension: loaded "/home/aras/Projects/UI/imports/shared/controls/qmldir" [:0]
[DBG | default] QQmlImports(file:///home/aras/Projects/UI/Main.qml)::addLibraryImport: "utils" 1.0 as "" [:0]
[DBG | default] QQmlImports(file:///home/aras/Projects/UI/Main.qml)::importExtension: loaded "/home/aras/Projects/UI/imports/shared/utils/qmldir" [:0]
[WARN | default] QQmlApplicationEngine failed to load component [:0]
[WARN | default] file:///home/aras/Projects/UI/Main.qml:6 module "Qt3D.Core" is not installed
[:0]
[CRIT | am.system] ERROR: Qml scene does not have a root object [:0]
Qt是安装在/usr/local/Qt-5.7.0：
$ which qml
/usr/local/Qt-5.7.0/bin//qml
[email protected]:~$ which qmake
/usr/local/Qt-5.7.0/bin//qmake
里面我.qml文件我试图导入我需要的3D库：
import Qt3D.Core 2.0
import Qt3D.Render 2.0
但是，当我尝试运行我的应用程序时，出现以下错误：
...module "Qt3D.Render" is not installed
...module "Qt3D.Core" is not installed
我认为这是我需要做的。我在这里错过了什么？
“我已经将$ QML2_IMPORT_PATH设置到我的Qt安装中的include目录中”，这肯定是错误的 - QML导入路径与C++包含无关。此外，你不应该设置该env变量，以查找随Qt提供的QML导入。所以，请将其解除。 – peppe
感谢您澄清。你能告诉我如何以及在哪里设置这个变量吗？它在'project.pro'文件中吗？几个文档提到了这个变量，但没有说如何设置它。 – Aras
这是一个环境变量，因此您在启动可执行文件时进行设置。如果您正在使用Creator，请在项目窗格（左侧）中运行给定套件（位于顶部）的设置，然后更改其中的环境。但总的来说，*你不需要为Qt自带的模块设置*。如果这些模块已安装但未找到，请将环境变量“QML_IMPORT_TRACE”设置为1并检查它们是否确实找到。 – peppe