QT之類型轉換

Qt在進行數據類型轉換時，容易忘記如何使用，或者是早已厭倦了百度QString轉QByteArray，QByteArray轉char*，QString轉string......。
現在分享一篇QT數據類型之間的轉換。
1、QString轉QByteArray
QByteArray byte;
QString string;
byte = string.toLatin1();
2、QByteArray轉QString
QByteArray byte;
QString string;
string = QString(byte);
3、QString轉String
QString string;
std::string str;
str = string.toStdString();
4、String轉QString
QString string;
std::string str;
string = QString::fromStdString(str);
5、QByteArray轉char *
char *ch; //不能定義成ch[n]，數組和指針不一樣;
QByteArray byte;
ch = byte.data();
6、char *轉QByteArray
char *ch;QByteArray byte;
byte = QByteArray(ch);
7、QString轉char *
QString string;char *ch;
ch = string.toLatin1.data();
8、char *轉QString
char *ch;
QString string= QString(QLatin1String(ch));
9、QHostAddress轉QString
QHostAddress address;
QString string = address.toString();
10、QString轉QHostAddress
QString string;
QHostAddress address(string);
11、QString轉unsigned char
QString string;
bool ok;
unsigned char uch = string.toInt(&ok, 16);
12、unsigned char轉QString
unsigned char uch;
QString string = QString::number(uch,16);
13、int轉QString
int m;
QString string;string=QString::number(m);
14、QString轉int
QString string;
int m;
m=string.toInt();