如何将QString转换为char *或者相反
How can I convert a QString to char* and vice versa ?(trolltech)
Answer:
Inorder to convert a QString to a char*, then you first need to get alatin1 representation of the string by calling toLatin1() on it whichwill return a QByteArray. Then call data() on the QByteArray to get apointer to the data stored in the byte array. See the documentation:
See the following example for a demonstration:
int main(int argc, char **argv)
{
QApplication app(argc, argv);
QString str1 = "Test";
QByteArray ba = str1.toLatin1();
const char *c_str2 = ba.data();
printf("str2: %s", c_str2);
return app.exec();
}
Note that it is necessary to store the bytearray before you call data() on it, a call like the following
const char *c_str2 = str2.toLatin1().data();
will make the application crash as the QByteArray has not been stored and hence no longer exists.
To convert a char* to a QString you can use the QString constructor that takes a QLatin1String, e.g:
QString string = QString(QLatin1String(c_str2)) ;
以上转自：/Alina-zl/archive//11/19/67323.html
1. 红色字体标出的存储那一步非常重要！！！！！！
2. 用toLatin1好像不支持中文，用toLocal8Bit可以支持。
