blackberry retranslate.onLanguageChanged不起作用

Question

我的申请无法正常运作

这是我的代码

    Label {
        // The label text is set using the qsTr() function to support translation.
        // and Retranslate.onLanguageChanged will force the string to update
        // if language change happens while the app is running.
        text: qsTr("hello world") + Retranslate.onLanguageChanged

        // The label text style.
        textStyle.base: SystemDefaults.TextStyles.BigText
        textStyle.color: Color.create("#085861")
    }

和

void ApplicationUI::onSystemLanguageChanged() {
QCoreApplication::instance()->removeTranslator(mTranslator);

QString localeString = QLocale().name();
QString fileName = QString("FirstProject_%1").arg(localeString);

if (mTranslator->load(fileName, "app/native/qm")) {
    QCoreApplication::instance()->installTranslator(mTranslator);
}
}

项目正常运作。

http://downloads.blackberry.com/upr/developers/downloads/sampleapps/cascades/hellocascades.zip

我认为我的源代码和链接项目的源代码完全相同。

但是我的项目，翻译方法不起作用....