QT 转为16进制(Hex)的Qstring

 

 long a = 63;
 QString s = QString::number(a, 16);             // s == "3f"
 QString t = QString::number(a, 16).toUpper();     // t == "3F"

//支持格式:long, int, uint, ulong, qlonglong, quint8,quint16,quint32
//转10进制就讲16改为10, 支持2-36进制转换