QString

From QtCentreWiki

A part of QtCore module in Qt4. Represents an Unicode string.

Official web resources

• Template:Ifeq:no
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• Task Tracker

Third party web resources

Please add here!

Common problems

In Qt4 those who don't read the docs carefully often run into problems when they try to convert a QString to char * using QString::toLatin1() or similar method. The proper way to do it is:

QString str( "some string" );
char * cStr = qstrdup( str.toLatin1() );
// use cStr
delete [] cStr;

or:

QString str( "some string" );
QByteArray ba( str.toLatin1() );
const char *cStr = ba.data(); // cStr is a valid pointer as long as ba exists
// use cStr

Constructions like this one:

QString str( "some string" );
char *cStr = str.toLatin1().data(); // ERROR!

won't work, since toLatin1() and other toXxx() methods return a temporary QByteArray, which will be destroyed immediately.

Example code

Please add source code example here!