import qml error：no such directory

cuijg

Shrishashank

Look at the error in QQmlApplicationEngie failed means path is not properly Set....

Shrishashank

@cuijg Also tell me exactly what are you trying to do ?Please Brief More

JonB

@Shrishashank
The OP is clearly asking why import "../Constants.qml" fails to find that file in the directory immediately above where App.qml lives, given the hierarchical directory structure in the screenshots.

Shrishashank

@JonB Got it Jon ,The thing is I also getting the same issue, but intead of QCoreApplication::applicatioDirpath() i given the hardcode path where it works for me ,but this way is also good and also taking the absolute path of the Dir,
Thank you for you Input .

JonB

@Shrishashank
I know nothing about QML so cannot answer the question. But this is an import statement in code. Clearly that cannot use a hard-coded, absolute path as it must work from anywhere. Nor can QCoreApplication::applicatioDirpath() or similar be used in an import statement. It seems clear a relative path would be required. But the OP says ../Constants.qml, which looks to be correct (if QML allows it) to reach that file from where App.qml is, apparently does not find it.

@cuijg
Your situation is reported in e.g. https://forum.qt.io/topic/98165/import-with-relative-path. There the OP fails on ... The solution there claims you are supposed to write

import ":/../Constants.qml"

Note the leading :/. Try that?

[UPDATE: Sorry, no, that appears to be for a resource file, like an icon, not a source code file.]

However I note that seems in contradiction to Qt docs at https://doc.qt.io/qt-6/qtqml-syntax-directoryimports.html, which does imply your plain ../... should work. As I said, I know nothing :) So good luck.

cuijg

@JonB This path ':/xxx/...' is not allowed. I even added the qrc resource file and the qml file, and then imported 'qrc:/xxx. qml', but still couldn't find the qml file. I'm powerless now

cuijg

I succeeded, but it looks very strange:
Step 1: Add to CMakeLists.txt:
set_source_files_properties(Constants.qml
PROPERTIES
QT_QML_SINGLETON_TYPE TRUE
)
Step 2: There is no need to explicitly reference Constants.qml in App. qml

As a result, the operation was successful

cuijg

This import does not import a file, but a directory, which is why the above error is always reported: no such directory

I understand a little bit now. The use of qml is like the classes and objects of c++. What are defined in the qml file are types. When using them, they cannot be directly referenced by the type name (unless a singleton object is defined). Instead, an object instance should be created using the type defined in qml, and then this instance object should be referenced.
For example: