How to convert a QString to a character array?

You can use the toUtf8() function of QString to convert a QString string to a character array. Here is an example code:

QString str = "Hello World";
QByteArray byteArray = str.toUtf8();
const char* charArray = byteArray.constData();

In the code above, the QString string is first converted to a QByteArray, and then the constData() function is used to get its const char* pointer. This way, the QString string can be converted to a character array.