QQmlApplicationEngine ¶

概要 ¶

详细描述 ¶

此类结合 QQmlEngine and QQmlComponent 提供加载单个 QML 文件的便捷方式。它还向 QML 暴露某些中心应用程序功能，C++/QML 混合应用程序通常从 C++ 进行控制。

它可以像这样使用：

#include <QGuiApplication>
#include <QQmlApplicationEngine>
int main(int argc, char *argv[])
{
    QGuiApplication app(argc, argv);
    QQmlApplicationEngine engine("main.qml");
    return app.exec();
}
											

不像 QQuickView , QQmlApplicationEngine does not automatically create a root window. If you are using visual items from Qt Quick, you will need to place them inside of a Window .

还可以使用 QCoreApplication with QQmlApplicationEngine , if you are not using any QML modules which require a QGuiApplication (譬如 QtQuick ).

配置列表的改变从默认 QQmlEngine :

• Translations are reloaded when the QJSEngine::uiLanguage / Qt.uiLanguage property is changed.

• Automatically sets an incubation controller if the scene contains a QQuickWindow .

• Automatically sets a QQmlFileSelector as the url interceptor, applying file selectors to all QML files and assets.

The engine behavior can be further tweaked by using the inherited methods from QQmlEngine .

class QQmlApplicationEngine ( [ parent=None ] ) ¶

QQmlApplicationEngine(filePath[, parent=None])

QQmlApplicationEngine(url[, parent=None])

param parent

QObject

param url

QUrl

param filePath

unicode

创建新的 QQmlApplicationEngine 采用给定 parent . You will have to call load() later in order to load a QML file.

PySide2.QtQml.QQmlApplicationEngine. load ( filePath ) ¶

参数

filePath – unicode

PySide2.QtQml.QQmlApplicationEngine. load ( url ) ¶

参数

url – QUrl

PySide2.QtQml.QQmlApplicationEngine. loadData ( data [ , url=QUrl() ] ) ¶

参数

• data – QByteArray

• url – QUrl

Loads the QML given in data . The object tree defined by data is instantiated immediately.

若 url is specified it is used as the base url of the component. This affects relative paths within the data and error messages.

If an error occurs, error messages are printed with qWarning .

PySide2.QtQml.QQmlApplicationEngine. objectCreated ( object , url ) ¶

参数

• object – QObject

• url – QUrl

PySide2.QtQml.QQmlApplicationEngine. rootObjects ( ) ¶

返回类型

Returns a list of all the root objects instantiated by the QQmlApplicationEngine . This will only contain objects loaded via load() or a convenience constructor.

注意

In Qt versions prior to 5.9, this function is marked as non- const .

PySide2.QtQml.QQmlApplicationEngine. setInitialProperties ( initialProperties ) ¶

参数

initialProperties –

设置 initialProperties with which the QML component gets initialized after it gets loaded.

另请参阅

setInitialProperties load loadData