QT中的数据类型转换总结

一、QString的转换

QString转QByteArray

QByteArray byte;
QString string;
byte = string.toLatin1();

QString转String

QString string;
std::string str;
str = string.toStdString();

QString转char *

QString string;
char *ch;
ch = string.toLatin1.data();

QString转QHostAddress

QString string;
QHostAddress address(string);

QString转int

QString string;
int m;
m=string.toInt();

QString转unsigned char

QString string;
bool ok;
unsigned char uch = string.toInt(&ok, 16);

二、String的转换

String转QString

QString string;
std::string str;
string = QString::fromStdString(str);

三、QByteArray的转换

QByteArray转char *

char *ch;         //不能定义成ch[n]，数组和指针不一样;
QByteArray byte;
ch = byte.data();

QByteArray转QString

QByteArray byte;
QString string;
string = QString(byte);

四、char、数组、指针的转换

char *转QByteArray

char *ch;
QByteArray byte;
byte = QByteArray(ch);

char *转QString

char *ch;
QString string= QString(QLatin1String(ch));

QHostAddress转QString

QHostAddress address;
QString string = address.toString();

unsigned char转QString

unsigned char uch;
QString string = QString::number(uch,16);

五、int类型的转换

int转QString

int m;
QString string;
string=QString::number(m);