如何在cmake中使用QML_ELEMENT [英] How to use QML_ELEMENT with cmake

问题描述

doc 显示我可以使用QML_ELEMENT宏来创建通过在qmake的.pro文件中添加一些变量，从C ++生成QML类型.但是我在用cmake

The doc shows I can use QML_ELEMENT macro to create QML types from C++ by adding some variables in qmake's .pro file. But I'm using cmake

推荐答案

现在Qt 6.0已被支持，尽管文献记载不多.您现在需要的是:

Now that Qt 6.0 is out this is supported, albeit poorly documented. What you need now is:

set_target_properties(foo PROPERTIES
    QT_QML_MODULE_VERSION 1.0
    QT_QML_MODULE_URI     Foo
)

qt6_qml_type_registration(foo)

然后，您可以在qml中进行操作:

you can then do in qml:

import Foo

，您将可以访问具有 QML_ELEMENT 和朋友的类型.注意:

and you'll have access to types that have QML_ELEMENT and friends. Notes:

• 在构建输出文件夹中创建了两个文件，分别是< project> _qmltyperegistrations.cpp 和< project> .qmltypes ，如果导入失败，则可以查看在那些看看哪些类型丢失.我发现有时需要在添加/删除注册类型之后进行完全重新编译.
• Qt示例已迁移到cmake，因此请查看例如 Examples/Qt-6.0.0/quick/tableview/gameoflife 看到它的实际作用
• 现在Qt源文件中的 pro2cmake.py 和 run_pro2cmake.py 文件位于 Qt/6.0.0/Src/qtbase/util/cmake .在自述文件页中提到了它们，您可以在此处，我自己还没有尝试过.

• Two files are created in the build output folder, <project>_qmltyperegistrations.cpp and <project>.qmltypes, if your imports are failing you can look at those to see which types are missing. I found that I needed to do full recompiles sometimes after adding/removing registered types.
• Qt examples have been migrated to cmake, so take a look at e.g. Examples/Qt-6.0.0/quick/tableview/gameoflife to see it in action
• There are now pro2cmake.py and run_pro2cmake.py files in the Qt sources at Qt/6.0.0/Src/qtbase/util/cmake. They are mentioned on this Readme page, you can find them here, haven't tried it myself.

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