我的项目包含 6 个 qml 文件: main.qml 打开一个新的 ApplicationWindow 并声明工具栏。它还使用 initalItem homescreen.qml 初始化 StackView。在主屏幕上,我有不同的按钮,通过 stack.push("URL") 打开不同的 qml 文件。除了 main.qml,所有文件都以 Item{} 开头。我已经能够连接来自 main.qml 和 home.qml 的信号。但是我一直无法访问堆栈中更深的对象。我不知道我是否需要更改我的 .cpp 代码以访问其他对象,或者我是否应该更改 StackView 的初始化,以便在开始时加载和访问所有文件。这是代码,分解为非常基础的代码:
main.qml
ApplicationWindow { Rectangle{ id: homeButton objectName: "homeButton" signal qmlSignal(string msg) MouseArea { onClicked: {stack.push({item:"qrc:/home.qml}); homeButton.qmlSignal("Hello")} } } StackView{ initalItem: "qrc:/home.qml" }
}
secondframe.qml // 主屏幕之后的随机 qml 文件
Item { Rectangle{ id: test objectName: "test" signal qmlSignal(string msg) MouseArea { onClicked: {stack.push({item:"qrc:/thirdframe.qml}); test.qmlSignal("Hello")} } } }
主文件
QApplication app (argc, argv); QQmlEngine enigne; QQmlComponent component(&engine, QUrl(QStringLiteral("qrl:/main.qml"))); QObject *object = componet.create(); QQmlComponent newcomponent(&engine, QUrl(QStringLiteral("qrl:/secondframe.qml"))); QObject *newobject = newcomponet.create(); MyClass myClass QObject *home = object->findChild<QObject*>("homeButton"); // I'm able to connect to every Object in the main.qml or home.qml QObject::connect(home,SIGNAL(qmlSignal(Qstring)), &myClass, SLOT(cppSlot(QString))); QObject *test = newobject->findChild<QObject*>("test"); // Can't connect to the Objects in secondframe.qml QObject::connect(test,SIGNAL(qmlSignal(Qstring)), &myClass, SLOT(cppSlot(QString)));