Qt通过Component创建对象

在QtQuick.Controls 1.4中用的是ApplicationWindow
在QtQuick.Window 2.2中用的是Window

int main(int argc,char *argv[]){    QGuiApplication app(argc, argv);    QQmlApplicationEngine engine;     engine.load(QUrl(QStringLiteral("qrc:///main.qml")));    return app.exec();}

//main.qmlimport QtQuick 2.6import QtQuick.Controls 1.4//import QtQuick.Window 2.2//ApplicationWindow组件在QtQuick.Controls 1.4//Window组件在QtQuick.Controls 1.4ApplicationWindow {    id: name    width: 200    height: 200    //默认不显示    visible: true    Text {        width: 100;        height: 100;        text:msg.author    }    Button_quit{    }}