How to Convert QBuffer to QString

You can convert QBuffer to QString using buffer function of the QBuffer. Here is how you can do it.

QBuffer b;
b.open(QBuffer::ReadWrite);
b.write(“http://amin-ahmadi.com”);
QString str = b.buffer();
qDebug() << str; // “http://amin-ahmadi.com”
b.close();

How to Split a QString by White Spaces

You need to use a QRegExp to achieve this. “\s” means any white space character and “+” means any number of that pattern. So you can use the following line to find any number of consecutive white spaces and split you string:

line.split(QRegExp(“\s+”))

How to Convert QString to Wide C String (wchar_t *)

The same as standard C String, for this also you can go through standard C++ as shown below:

Let’s say you have a QString, like this:

QString s = “www.amin-ahmadi.com”;

First convert it to std::wstring and then use its c_str method, like this:

s.toStdWString().c_str()

How to convert QString to C String (char *)

The best solution for this would be to go through standard C++ and it means this:

Let’s say you have a QString, like this:

QString s = “www.amin-ahmadi.com”;

 

First convert it to std::string and then use its c_str method, like this:

s.toStdString().c_str()