Question

我在尝试从ApplicationWindow切换到另一个时遇到了这个问题。

我有第一个名为login.qml的Window，它通过以下信号打开main.qml：

onIdAutenticadoChanged: {
    if(idAutenticado > 0){
        console.log("login.qml: Autenticado ID: " + idAutenticado);
        LoginController.abrirMain();
        close();
    } else if(idAutenticado == 0){
        senhaInput.text = "";
        console.log("Falha na autenticação: Usuário e/ou senha inválidos.");
        lblMsgErro.text = "Usuário e/ou senha inválidos.";
        lblMsgErro.visible = true;
        loginInput.focus = true;
    }
}

插槽 LoginController.abrirMain（）将加载并显示main.qml

void QLoginController::abrirMain()
{
    QQmlApplicationEngine engine;
    engine.rootContext()->setContextProperty("MainController", new QMainController(0,m_autenticado));
    engine.load(QUrl(QStringLiteral("qrc:///main.qml")));

    QQuickWindow* window = qobject_cast<QQuickWindow*>(engine.rootObjects().at(0));
    window->showFullScreen();
}

问题是：没有显示main.qml。

//main.qml
ApplicationWindow {
    id: mainWindow
    visible: true
    modality: "WindowModal"
    visibility: "FullScreen"
    color: "#09435b"
}

问题：我是否使用正确的方法打开这个新窗口？如果没有，我该怎么做？

Answer 1

因为您在堆栈上创建了引擎:)，它将在abrirMain()返回之前自动删除，因此也会破坏窗口。

你应该在堆上创建引擎。像这样：

// 'this' will become engine's parent and will automaticlaly delete engine when 'this' is deleted
QQmlApplicationEngine *engine = new QQmlApplicationEngine(this); 
engine->rootContext()->setContextProperty("MainController", new QMainController(0,m_autenticado));
engine->load(QUrl(QStringLiteral("qrc:///main.qml")));

QQuickWindow* window = qobject_cast<QQuickWindow*>(engine->rootObjects().at(0));
window->showFullScreen();

关闭ApplicationWindow并打开一个新的？

1 个答案: