FTP服务初始化时，考虑到重连、以及commandFinished信号信号执行完成置m_bCmdFinished 为true;
cpp
void ICore::connectFtpServer()
{
if(g_pFile == nullptr)
{
g_pFile = new QFile;
}
if(g_pFtp)
{
g_pFtp->state();
g_pFtp->abort();
g_pFtp->deleteLater();
g_pFtp = nullptr;
m_bCmdFinished = false;
}
if (g_pFtp == nullptr)
{
g_pFtp = new QFtp;
// connect(ICore::instance().getFtpPtr(), &QFtp::dataTransferProgress,[](qint64 readBytes, qint64 totalBytes){
// if(readBytes == totalBytes)
// {
// qDebug() << QString::fromLocal8Bit("数据传输结束，%1字节/%2字节").arg(readBytes).arg(totalBytes);
// }
// });
connect(ICore::instance().getFtpPtr(), &QFtp::stateChanged,[](int state){
cDebug(QString(u8"FTP状态改变:%1!").arg(state));
if(QFtp::LoggedIn != state)
{/*
g_pFtp->state();
g_pFtp->abort();
g_pFtp->deleteLater();
g_pFtp = nullptr;
connectFtpServer();*/
cDebug(u8"FTP服务器断开，正在进行重连!");
// m_bCmdFinished = false;
}
// else if(QFtp::Connected == state){
// cDebug(u8"FTP服务器连接成功!");
// m_bCmdFinished = true;
// }
// else if(QFtp::LoggedIn == state){
// cDebug(u8"FTP服务器登录成功!");
// m_bCmdFinished = true;
// }
});
connect(ICore::instance().getFtpPtr(), &QFtp::listInfo,[](QUrlInfo urlInfo){
if( !urlInfo.name().isEmpty())
{
m_ftpUrlList.insert(QString::fromLocal8Bit(urlInfo.name().toLatin1()));
}
});
connect(g_pFtp, &QFtp::commandFinished,[](int ret, bool error){
if (error)
{
cDebug(QString::fromLocal8Bit(u8"正在操作FTP服务器，操作失败：%1").arg(g_pFtp->errorString()));
}
else{
if(g_pFtp->currentCommand() == QFtp::ConnectToHost)
{
cDebug(tr(u8"正在连接FTP服务器，成功连接到服务器"));
m_bCmdFinished = true;
}
else if (g_pFtp->currentCommand() == QFtp::Login) {
cDebug(tr(u8"正在连接FTP服务器，登录成功"));
m_ftpUrlList.clear();
g_pFtp->list();
m_bFtpVaild = true;
m_reConnectFtpTimer.start(10000);
}
else if (g_pFtp->currentCommand() == QFtp::Close) {
cDebug(tr(u8"正在断开FTP服务器连接，断开成功"));
m_ftpUrlList.clear();
g_pFile->close();
m_bFtpVaild = false;
m_bCmdFinished = true;
}
else if (ICore::instance().getFtpPtr()->currentCommand() == QFtp::Cd){
cDebug(tr(u8"正在操作FTP服务器，切换路径成功！"));
m_ftpUrlList.clear();
g_pFtp->list();
g_pFile->close();
}
else if (ICore::instance().getFtpPtr()->currentCommand() == QFtp::Put)
{
cDebug(tr(u8"正在操作FTP服务器，文件上传完成"));
m_ftpUrlList.clear();
g_pFtp->list();
g_pFile->close();
}
else if (ICore::instance().getFtpPtr()->currentCommand() == QFtp::Mkdir){
cDebug(tr(u8"正在操作FTP服务器，新建目录完成"));
m_ftpUrlList.clear();
g_pFtp->list();
}
if (ICore::instance().getFtpPtr()->currentCommand() == QFtp::Get) {
cDebug(tr(u8"正在操作FTP服务器，文件下载完成"));
m_ftpUrlList.clear();
g_pFtp->list();
g_pFile->close();
}
else if(ICore::instance().getFtpPtr()->currentCommand() == QFtp::Rmdir || ICore::instance().getFtpPtr()->currentCommand() == QFtp::Remove){
cDebug(tr(u8"正在操作FTP服务器，文件删除完成！"));
m_ftpUrlList.clear();
g_pFtp->list();
}
else if(ICore::instance().getFtpPtr()->currentCommand() == QFtp::List){
m_bCmdFinished = true;
}
}
});
QSettings settings("./data/ftpCfg.ini", QSettings::IniFormat);
settings.setIniCodec(QTextCodec::codecForName("UTF-8"));
QString hostName = settings.value("server/hostName").toString();
uint port = settings.value("server/port").toString().toUInt();
g_pFtp->connectToHost(hostName, port);
//连接成功，执行下一条指令
while(!m_bCmdFinished){
QCoreApplication::processEvents();
QThread::msleep(10);
}
resetCmdFinished();
g_pFtp->login("anonymous","");
//登录成功，执行下一条指令
while(!m_bCmdFinished){
QCoreApplication::processEvents();
QThread::msleep(10);
}
resetCmdFinished();
g_pFtp->list();
}
}以UI界面上传文件为例，
cpp
{
//第一步：根据资源类型，判断目录是否存在，不存在则创建目录
ICore::instance().getFtpPtr()->cd(ICore::instance().getFTPRootDir());
QString sDir = comboBox_type->currentText();
QString sdir = QString::fromLatin1(comboBox_type->currentText().toLocal8Bit());
if(!ICore::instance().isExist(sDir))
{
while(!ICore::instance().currentCmdIsFinished()){
QCoreApplication::processEvents();
QThread::msleep(10);
}
ICore::instance().resetCmdFinished();
ICore::instance().getFtpPtr()->mkdir(sdir);
}
//第二步：切换进目录
while(!ICore::instance().currentCmdIsFinished()){
QCoreApplication::processEvents();
QThread::msleep(10);
}
ICore::instance().resetCmdFinished();
ICore::instance().getFtpPtr()->cd(sdir);
//第三步：上传本地文件至ftp服务器
while(!ICore::instance().currentCmdIsFinished()){
QCoreApplication::processEvents();
QThread::msleep(10);
}
ICore::instance().resetCmdFinished();
QString fileName = m_pUpLoadRecord.filepath.split("/").takeLast();
QString filename = QString::fromLatin1( m_pUpLoadRecord.filepath.toLocal8Bit());
if(!ICore::instance().isExist(fileName))
{
ICore::instance().getLocalFile()->setFileName( lineEdit_filePath->property("fullFilePath").toString());
if (ICore::instance().getLocalFile()->isOpen()) {
ICore::instance().getLocalFile()->close();
}
ICore::instance().getLocalFile()->open(QIODevice::ReadOnly);
ICore::instance().getFtpPtr()->put(ICore::instance().getLocalFile(), filename);
}
else{
qDebug() << QString::fromLocal8Bit("ftp服务器目录[%1]下，文件[%2]已存在").arg(sDir).arg(fileName);
//第三点一步：删除已有文件
while(!ICore::instance().currentCmdIsFinished()){
QCoreApplication::processEvents();
QThread::msleep(10);
}
ICore::instance().resetCmdFinished();
ICore::instance().getFtpPtr()->remove(filename);
//第三点二步：上传新文件
while(!ICore::instance().currentCmdIsFinished()){
QCoreApplication::processEvents();
QThread::msleep(10);
}
ICore::instance().getLocalFile()->setFileName( lineEdit_filePath->property("fullFilePath").toString());
if (ICore::instance().getLocalFile()->isOpen()) {
ICore::instance().getLocalFile()->close();
}
ICore::instance().getLocalFile()->open(QIODevice::ReadOnly);
ICore::instance().getFtpPtr()->put(ICore::instance().getLocalFile(), filename);
}
//第四步：返回根目录
while(!ICore::instance().currentCmdIsFinished()){
QCoreApplication::processEvents();
QThread::msleep(10);
}
ICore::instance().resetCmdFinished();
ICore::instance().getFtpPtr()->cd(ICore::instance().getFTPRootDir());
//第五步：等待返回根目录后，上传记录到数据库表
while(!ICore::instance().currentCmdIsFinished()){
QCoreApplication::processEvents();
QThread::msleep(10);
}
ICore::instance().resetCmdFinished();
.........
}