Why is a C++ class reported as undefined in QML?
↗ Original Qt Forum discussionQM • Qt Forum member • September 11, 2026 • 1 answers
A developer had a QObject-based C++ class but QML could not see or instantiate it.
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Dheerendra V Purohit
✓ Accepted September 11, 2026 • Independent answer
Dheerendra explained that a C++ class must be exposed or registered before QML can use it. In the follow-up he also highlighted that a registered creatable type needs an accessible constructor.
cpp
qmlRegisterType<Info>("Company.Types", 1, 0, "Info");
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