使用QT实现FTP上传与权限管理，集成程序图标设置

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    _manager = new QNetworkAccessManager(this);

    connect(_manager, SIGNAL(finished(QNetworkReply*)),
            this, SLOT(replyFinished(QNetworkReply*)));
    connect(_manager, SIGNAL(networkAccessibleChanged(QNetworkAccessManager::NetworkAccessibility)),
            this, SLOT(networkAccessibleChanged(QNetworkAccessManager::NetworkAccessibility)));
    connect(_manager, SIGNAL(sslErrors(QNetworkReply*,QList<QSslError>)),this, SLOT(slotSslErrors(QNetworkReply*,QList<QSslError>)));

    _tc = QTextCodec::codecForLocale();
  
    myProcess = new QProcess();
    connect(myProcess,SIGNAL(error(QProcess::ProcessError)),this,SLOT(slotProcessError(QProcess::ProcessError)));
    connect(myProcess,SIGNAL(finished(int,QProcess::ExitStatus)),this,SLOT(slotFinished(int,QProcess::ExitStatus)));
    connect(myProcess,SIGNAL(stateChanged(QProcess::ProcessState)),this,SLOT(slotStateChanged(QProcess::ProcessState)));
    connect(myProcess,SIGNAL(readyRead()),this,SLOT(slotProcesReadyRead()));
    connect(myProcess,SIGNAL(readyReadStandardError()),this,SLOT(slotProcesReadyRead()));
    connect(myProcess,SIGNAL(readyReadStandardOutput()),this,SLOT(slotProcesReadyRead()));
    myProcess->start("cmd");
}
//上传文件 选择的文件 ，上传到ftp 上的文件命令路径
void MainWindow::putFile(QString fileName,QString fileUrl)
{
    showStatus("------------------------------------------------------");
    fileName = fileName.toUtf8();
    fileUrl = fileUrl.toUtf8();

    QFile txt1(fileName);
    QFileInfo upfileName(fileName);
    if (!txt1.exists())
    {
        showStatus(fileName+" not exists !");
        return;
    }
    txt1.open(QIODevice::ReadOnly);
    QString msg = "fileName "+fileName;
    showStatus(msg);
    if(txt1.isOpen())
        showStatus("file open succeed!");
    else
        showStatus("file open fail!");

    QByteArray by_txt=txt1.readAll();
    msg= "file size "+QString::number(txt1.size())+"!" ;
    showStatus(msg);
    //    msg = "by_txt size "+QString::number(by_txt.size())+"!" ;
    //    showStatus(msg);
    txt1.close();
    if(fileUrl.isEmpty())
        fileUrl = upfileName.baseName() ;
    _upFilePath = QString(FTP_IPADDR )+fileUrl;

    QUrl u(_upFilePath.toUtf8());
    //QUrl u("ftp://192.168.100.116/lib/"+fileUrl);
    u.setPort(21);
    u.setUserName(QString(FTP_USER));
    u.setPassword(QString(FTP_PWD));