bool isPureNumber(QString str)
{
	if(str.isEmpty())
		return;
	bool flag = false;
    QByteArray array = mapName.toLatin1();
    const char* charStr = array.data();
    while(*charStr  && *charStr  >= '0' && *charStr  <= '9')
        charStr ++;
    if(*charStr)
        flag = false;
    else
        flag =  true;
	return flag;
}