Qt String Conversion and processing-18 bend road

The company recently asked to use Qt to write programs. The most depressing thing is the conversion between strings. Let's do it yourself! Fortunately, I am able to handle the problem... I also tried several built-in Qt conversion methods.

#include <QtGui/QApplication>#include "testqstring.h"#include "boost/lexical_cast.hpp"#include <iostream>#include <string>#include <stdio.h>#include <QDebug>using namespace std;int main(int argc, char *argv[]){    QApplication a(argc, argv);    testQString w;    w.show();    QString qStr="testString";    qDebug()<<"wyz-------1:"<<qStr;    string str=qStr.toStdString();    cout<<"wyz-------2:"<<str<<endl;    char *cStr;    cStr=(char*)str.c_str();    cout<<"wyz-------3:"<<cStr<<endl;    string str_1="testString2";    QString qStr_1;    qStr_1.sprintf("%s",str_1.c_str());    qDebug()<<"wyz-------4:"<<qStr_1;    return a.exec();}

Running result:

Starting/root/testQString-build-desktop/testQString...
Wyz ------- 1: "testString"
Wyz ------- 2: testString
Wyz ------- 3: testString
Wyz ------- 4: "testString2"

 

Convert int to QString
QString & sprintf (const char * cformat ,...)

String strData = write1.write (smsJson );
StrData = boost: erase_all_copy (strData, "\ n ");

 

String
StrTemp =
M_qStrInfo.toStdString ();

vector<string > splitVec;

boost::split(splitVec, strTemp, boost::is_any_of("\r\n"));

 

 

 

========= Copy the documents from the online copy ====================

// Common parameter types: char * string, QByteArray character array, and QString string
// Need to be converted: char * --- convert --- QByteArray --- the constructor of the QByteArray class needs to be called
Char * -------------- QByteArray (const char *) -----------> QByteArray
Char * str;
QByteArray byte (str );

Char * -------------- QString (const char *) ------------> QString
Char * str;
QString string (str );

QByteArray ------------- data () --------------------> char *
QByteArray byte;
Char * str = byte. data ();

QByteArray ------------ QString () -------------------> QString
QByteArray byte;
QString string (byte );

QString -------------- toAscii () ------------------> QByteArray
QString string;
QByteArray byte = string. toAscii ();

QString ------------- qPrintable () ------------------> char *
QString string;
Char * str = qPrintable (string );

QString s2q (const string & s)
{
Return QString (QString: fromLocal8Bit (s. c_str ()));
}
String q2s (const QString & s)
{
Return string (const char *) s. toLocal8Bit ());
}

QByteArray qba = m_pTcpSocket-> readAll ();
QString strings (qba); // convert to a qt string

QByteArray qba = tcpSocket-> readAll ();
Char * readStr = qba. data (); // convert QByteArray to char