Qt4之国际化精晣

还是从一个Hello World开始吧。

1.首先这个例子在D:\Qt\4.7.3\examples\linguist\hellotr，当然不同的版本和路径则有所不同。

这个例子中有两个文件：

main.cpp:

/******************************************************************************** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).** All rights reserved.** Contact: Nokia Corporation ([e-mail])**** This file is part of the examples of the Qt Toolkit.**** $QT_BEGIN_LICENSE:BSD$** You may use this file under the terms of the BSD license as follows:**** "Redistribution and use in source and binary forms, with or without** modification, are permitted provided that the following conditions are** met:**   * Redistributions of source code must retain the above copyright**     notice, this list of conditions and the following disclaimer.**   * Redistributions in binary form must reproduce the above copyright**     notice, this list of conditions and the following disclaimer in**     the documentation and/or other materials provided with the**     distribution.**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor**     the names of its contributors may be used to endorse or promote**     products derived from this software without specific prior written**     permission.**** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."** $QT_END_LICENSE$******************************************************************************/#include <QApplication>#include <QPushButton>//! [0]#include <QTranslator>//! [0]//! [1] //! [2]int main(int argc, char *argv[])//! [1] //! [3] //! [4]{    QApplication app(argc, argv);//! [3]//! [5]    QTranslator translator;//! [5] //! [6]    translator.load("hellotr_la");//! [6] //! [7]    app.installTranslator(&translator);//! [4] //! [7]//! [8]    QPushButton hello(QPushButton::tr("Hello world!"));//! [8]    hello.resize(100, 30);    hello.show();    return app.exec();}//! [2]

而hellotr.pro文件如下：

TEMPLATE = appTARGET = DEPENDPATH += .INCLUDEPATH += .# InputSOURCES += main.cppTRANSLATIONS += hellotr_la.tsCODECFORTR = utf-8 #or gbk

其中:

TRANSLATIONS += hellotr_la.tsCODECFORTR = utf-8 #or gbk

为国际化资源文件以及它的编码。

以下是一些dos命令：

在hellotr.pro添加如下代码： SOURCES      = main.cpp TRANSLATIONS = hellotr_la.tsCODECFORTR = utf-8 #or gbk•在 .pro 中指定要生成的ts文件时，在 .pro 文件内指定编码CODECFORTR = utf-8 #or gbk运行:或者运行：lupdate -verbose hellotr.pro生成hellotr_la.ts查看hellotr_la.ts并保存.linguist hellotr_la.ts运行lrelease  hellotr.pro生成hellotr_la.qmqmake -projectqmake hellotr.promake

之后在文件中生成如下所示：

未经过处理，直接运行debug下面的exe程序，得到如下：

将hellotr_la.qm放在debug目录下，或将debug目录下面的exe文件放至hellotr目录下面

可以得到如下：

最后再讲解一下hellotr_la.ts,这个文件通过运行lupdate -verbose hellotr.pro生成，或者在hellotr.pro中加入TRANSLATIONS += hellotr_la.ts生成。

而CODECFORTR = utf-8 #or gbk用于指定hellotr_la.ts中的编码，不然会产生乱码。

hellotr_la.ts源码如下：

<?xml version="1.0" encoding="utf-8"?><!DOCTYPE TS><TS version="2.0" language="zh_CN"><defaultcodec>UTF-8</defaultcodec><context>    <name>QPushButton</name>    <message>        <location filename="main.cpp" line="63"/>        <source>Hello world!</source>        <translation type="unfinished">你好</translation>    </message></context></TS>

注意：要去掉type="unfinished",不然这个资源文件将不起重要的。

待续之。。。。。