Use createComponent in qml but the status is always error

Question

When I use Qt.createComponent to create component dynamically, the stutas is always Component.error but I cannot understand the reason.

I used it like that:

Rectangle{
    function loadTest(){
        function finishCreation() {
            if (component.status === Component.Ready) {
                console.log("ready")
            } else if (component.status === Component.Error) {
                // Error Handling
                console.log("Error loading component:", component.errorString());
            }
        }

        var component = Qt.createComponent("MyPage.qml");
        console.log(component.status)
        console.log("Error loading component:", component.errorString());
        component.statusChanged.connect(finishCreation);

        if (component.status === Component.Ready) {
            var button = component.createObject(container);
            console.log("ready")
        }
    }

    Component.onCompleted: {
        console.log("Completed Running!")
        loadTest()
    }
}

If the MyPage.qml does not exist in the qrc file, the error is

qrc:/MyPage.qml:-1 File not found"

If I set the full path of MyPage.qml, I get a Network error.

When I add the SeriesSelectionPage.qml file to the resource file, it works. But it shouldn't be dynamic?

I just want to find a QML file and load it dynamically when the application executes so that the application can load different QML according to user operations.

Anyone knows how to do that? I'm going crazy.

BaCaRoZzo · Accepted Answer · 2016-02-09 15:48:39Z

5

Qt.createComponent() takes a url as its first argument. From the url documentation:

The url type refers to a resource locator (like a file name, for example). It can be either absolute, e.g. "http://qt-project.org", or relative, e.g. "pics/logo.png". A relative URL is resolved relative to the URL of the containing component.

So, as long as you're using relative URLs from within a file that is loaded from a QRC file, you'll need to use the qrc scheme:

var component = Qt.createComponent("qrc:/MyPage.qml");

edited Feb 9, 2016 at 15:48

BaCaRoZzo

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answered Sep 15, 2015 at 17:29

Mitch

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9 Comments

Max Go Over a year ago

It will be better just add the QML file into resources and use "qrc:/" protocol in URL.

Mitch Over a year ago

I was under the impression that OP wanted the end user to be able to choose a QML file... guess I misread.

Max Go Over a year ago

Yes, you are right. looks like your first version of answer is more correct :) Sorry

Mitch Over a year ago

No, I think you're right and I just read the question incorrectly! Haha. :)

behtgod Over a year ago

Thank you all. I'm so sorry that my English is too weak to express clearly.

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