1 实现功能
动态加载不同语言
2 基础
【Qt QML】Qt Linguist使用方法，国际化，翻译
3 动态加载
3.1 languageset.h
#ifndef LANGUAGESET_H
#define LANGUAGESET_H
#include <QObject>
#include <QGuiApplication>
#include <QtWidgets/QApplication>
#include <QQmlApplicationEngine>
#include <QTranslator>
class LanguageSet : public QObject
{
Q_OBJECT
public:
explicit LanguageSet(QApplication& app, QQmlApplicationEngine& engine);
Q_INVOKABLE void setLanguage(QString language);
Q_INVOKABLE int getLanguageIdx(QString language);
Q_INVOKABLE QString getLanguageName(int idx);
private:
QApplication* m_app;
QQmlApplicationEngine* m_engine;
QList<QString> m_langList;
QTranslator* m_translator;
signals:
};
#endif // LANGUAGESET_H
3.2 languageset.cpp
#include "languageset.h"
LanguageSet::LanguageSet(QApplication& app, QQmlApplicationEngine& engine)
{
m_app = &app;
m_engine = &engine;
m_translator = new QTranslator();
m_langList.append("zh_CN");
m_langList.append("en_US");
}
/**
* @brief 语言设置，支持qml
* @param language： zh_CN, en_US
*/
void LanguageSet::setLanguage(QString language)
{
if(language == "zh_CN")
{
m_translator->load("zh_CN.qm");
}
else if(language == "en_US")
{
m_translator->load("en_US.qm");
}
m_app->installTranslator(m_translator);
m_engine->retranslate();
}
/**
* @brief 获取语言编号
* @param language
* @return zh_CN:0
* en_US:1
*/
int LanguageSet::getLanguageIdx(QString language)
{
for(int i=0; i<m_langList.length(); i++){
if(language == m_langList.at(i)){
return i;
}
}
return 0;
}
/**
* @brief 获取语言名称
* @param idx
* @return
*/
QString LanguageSet::getLanguageName(int idx)
{
if(idx >= m_langList.length())
m_langList.at(0);
return m_langList.at(idx);
}
3.3 main.cpp
#include <QGuiApplication>
#include <QtWidgets/QApplication>
#include <QQmlApplicationEngine>
#include <QDir>
#include <QQmlContext>
#include "Cpp/languageset.h"
int main(int argc, char *argv[])
{
qputenv("QT_IM_MODULE", QByteArray("qtvirtualkeyboard"));
#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
#endif
QApplication app(argc, argv);
QQmlApplicationEngine engine;
//Settings设置
app.setOrganizationName("custom");
app.setOrganizationDomain("com.custom");
app.setApplicationName("test");
QSettings _mGlobalSettings;
// ------ 载入翻译 -------
LanguageSet languageSet(app, engine);
QString lang = _mGlobalSettings.value("_mLanguage", "zh_CN").toString();
languageSet.setLanguage(lang);
//暴露给qml
engine.rootContext()->setContextProperty("_mLanguageSet", &languageSet);
// ------ 载入翻译 -------
const QUrl url(QStringLiteral("qrc:/main.qml"));
QObject::connect(&engine, &QQmlApplicationEngine::objectCreated,
&app, [url](QObject *obj, const QUrl &objUrl) {
if (!obj && url == objUrl)
QCoreApplication::exit(-1);
}, Qt::QueuedConnection);
engine.load(url);
return app.exec();
}
3.4 qml中使用
MyComboBox{
id: _mLang
height: 50
width: 500
_mName: qsTr("语言")
_mModel: ['简体中文', 'English']
_mCurrentIndex: _mLanguageSet.getLanguageIdx(_mGlobalSettings.value("_mLanguage", "zh_CN"))
on_MCurrentIndexChanged: {
//语言修改
if(_mCurrentText == "") return;
_mGlobalSettings._mLanguage = _mLanguageSet.getLanguageName(_mCurrentIndex)
_mLanguageSet.setLanguage(_mGlobalSettings._mLanguage)
}
}
4. 注意
languageset.cpp中的setLanguage()函数要注意。
m_translator要在堆上创建- 如果在
栈上创建，函数执行完毕就销毁了，导致翻译没有效果。
void LanguageSet::setLanguage(QString language)
{
if(language == "zh_CN")
{
m_translator->load("zh_CN.qm");
}
else if(language == "en_US")
{
m_translator->load("en_US.qm");
}
m_app->installTranslator(m_translator);
m_engine->retranslate();
}