Qt qml文件在qrc中不工作？

平台：win8，qt5.0

this->engine = new QQmlEngine;
this->component = new QQmlComponent(this->engine, ":/Foodie.qml");
this->mainWindow = new QQuickWindow;


while(this->component->isReady()) {
    this->mainItem = qobject_cast<QQuickItem*>(component->create());
    this->mainItem->setParentItem(this->mainWindow->contentItem());
    break;
}



<RCC>
    <qresource prefix="/">
        <file>Foodie.qml</file>
    </qresource>
</RCC>

this->engine=newqqmlengine；
this->component=newqqmlcomponent（this->engine，：/Foodie.qml”）；
此->主窗口=新的QQuickWindow；
而（此->组件->isReady（））{
此->mainItem=qobject_cast（组件->创建（））；
this->mainItem->setParentItem（this->mainWindow->contentItem（））；
打破
}
Foodie.qml

see this passage..  component would not load auto.