修复文件长度没有初始化造成大小计算不对

mainwindow.cpp

@@ -111,7 +111,7 @@ void MainWindow::newConnect()
 void MainWindow::readyRead()
 {
     QByteArray BA = tcpSocket->readAll();
-    //qDebug() << BA ;    
+    QString IP_remote = tcpSocket->peerAddress().toString().replace("::ffff:","") + ":" + QString::number(tcpSocket->peerPort());
     if (state == 0) {
         QString s = BA;
         QJsonParseError JPE;
@@ -123,18 +123,18 @@ void MainWindow::readyRead()
                 type = JO.value("type").toString();
                 if (type == "text") {
                     QString message = JO.value("message").toString();
-                    ui->textBrowser->append("[" + QDateTime::currentDateTime().toString("HH:mm:ss") + "] " + "接收：" + message);
+                    ui->textBrowser->append("[" + QDateTime::currentDateTime().toString("HH:mm:ss") + "] [" + IP_remote + "]：" + message);
                 } else if(type == "file") {
                     fileName = JO.value("fileName").toString();
                     lastModified = JO.value("lastModified").toDouble()/1000;
-                    ui->textBrowser->append("[" + QDateTime::currentDateTime().toString("HH:mm:ss") + "] " + "接收：" + fileName);
+                    ui->textBrowser->append("[" + QDateTime::currentDateTime().toString("HH:mm:ss") + "] [" + IP_remote + "]：" + fileName);
                     QString filepath = ui->lineEdit_root_dir->text() + "/" + fileName;
                     file.setFileName(filepath);
                     file.open(QIODevice::WriteOnly);
                 }
             }
         }
-    } else {
+    } else if (state == 1) {
         file.write(BA);        
         length += BA.length();
         ui->statusBar->showMessage("接收：" + BS(length));

mainwindow.h

@@ -40,7 +40,7 @@ private:
     QTcpSocket *tcpSocket;
     int state;
     QFile file;
-    qint64 length, port_local;
+    qint64 length=0, port_local;
     QString BS(long b);    
     void upload(QString filepath);
     double lastModified = 0;