新人求助，QT制作的TCP客户端和服务器运行崩溃

求助大佬可以的话帮我看看是什么问题，这个demo的题目是基于Qt分别实现Tcp的服务器和客户端的编程，并演示服务器与客户端之间的数据通讯。通讯要求：客户端向服务器端分时发送10组随机数，服务器端将接收到的随机数以折线图的形式显示在服务器端的界面上。然后我做了一个客户端一个服务器，现在服务器一绘图就崩溃，客户端一生成随机数就崩溃，这个要怎么改呀？求各位大佬指点指点
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QtNetwork>
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
LabListen=new QLabel("监听状态:");
LabListen->setMinimumWidth(150);
ui->statusBar->addWidget(LabListen);
LabSocketState=new QLabel("Socket状态：");
LabSocketState->setMinimumWidth(200);
ui->statusBar->addWidget(LabSocketState);
QString localIP=getLocalIP();//本机IP
this->setWindowTitle(this->windowTitle()+"----本机IP："+localIP);
ui->comboIP->addItem(localIP);
tcpServer=new QTcpServer(this);
connect(tcpServer,SIGNAL(newConnection()),this,SLOT(onNewConnection()));
while(readytoline == true)
{
creatLineSeries();
}
}
MainWindow::~MainWindow()
{
delete ui;
}
QString MainWindow::getLocalIP()
{
QString hostName=QHostInfo::localHostName();//本地主机名
QHostInfo hostInfo=QHostInfo::fromName(hostName);
QString localIP="";
QList<QHostAddress> addList=hostInfo.addresses();
if (!addList.isEmpty())
for (int i=0;i<addList.count();i++)
{
QHostAddress aHost=addList.at(i);
if (QAbstractSocket::IPv4Protocol==aHost.protocol())
{
localIP=aHost.toString();
break;
}
}
return localIP;
}
void MainWindow::closeEvent(QCloseEvent *event)
{
if (tcpServer->isListening())
tcpServer->close();//停止网络监听
event->accept();
}
void MainWindow::onNewConnection()
{
tcpSocket = tcpServer->nextPendingConnection(); //创建socket
connect(tcpSocket, SIGNAL(connected()),this, SLOT(onClientConnected()));
onClientConnected();
connect(tcpSocket, SIGNAL(disconnected()),this, SLOT(onClientDisconnected()));
connect(tcpSocket,SIGNAL(stateChanged(QAbstractSocket::SocketState)),this,SLOT(onSocketStateChange(QAbstractSocket::SocketState)));
onSocketStateChange(tcpSocket->state());
connect(tcpSocket,SIGNAL(readyRead()),this,SLOT(onSocketReadyRead()));
}
void MainWindow::onSocketStateChange(QAbstractSocket::SocketState socketState)
{
qDebug()<<"走到这了";
switch(socketState)
{
case QAbstractSocket::UnconnectedState:
LabSocketState->setText("scoket状态：UnconnectedState");
break;
case QAbstractSocket::HostLookupState:
LabSocketState->setText("scoket状态：HostLookupState");
break;
case QAbstractSocket::ConnectingState:
LabSocketState->setText("scoket状态：ConnectingState");
break;
case QAbstractSocket::ConnectedState:
LabSocketState->setText("scoket状态：ConnectedState");
break;
case QAbstractSocket::BoundState:
LabSocketState->setText("scoket状态：BoundState");
break;
case QAbstractSocket::ClosingState:
LabSocketState->setText("scoket状态：ClosingState");
break;
case QAbstractSocket::ListeningState:
LabSocketState->setText("scoket状态：ListeningState");
}
}
void MainWindow::onClientConnected()
{
ui->plainTextEdit->appendPlainText("**client socket connected");
ui->plainTextEdit->appendPlainText("**peer address:"+tcpSocket->peerAddress().toString());
ui->plainTextEdit->appendPlainText("**peer port:"+QString::number(tcpSocket->peerPort()));
}
void MainWindow::onClientDisconnected()
{
ui->plainTextEdit->appendPlainText("**client socket disconnected");
tcpSocket->deleteLater();
}
void MainWindow::onSocketReadyRead()
{
while(tcpSocket->canReadLine()){
*buffer=tcpSocket->readLine();
ui->plainTextEdit->appendPlainText("[in] "+*buffer);
readytoline = true;
}
}
void MainWindow::on_actStart_triggered()
{
QString IP=ui->comboIP->currentText();//IP地址
quint16 port=ui->spinPort->value();//端口
QHostAddress addr(IP);
tcpServer->listen(addr,port);//
ui->plainTextEdit->appendPlainText("**开始监听...");
ui->plainTextEdit->appendPlainText("**服务器地址："+tcpServer->serverAddress().toString());
ui->plainTextEdit->appendPlainText("**服务器端口："+QString::number(tcpServer->serverPort()));
ui->actStart->setEnabled(false);
ui->actStop->setEnabled(true);
LabListen->setText("监听状态：正在监听");
}
void MainWindow::on_actStop_triggered()
{
if (tcpServer->isListening()) //tcpServer正在监听
{
tcpServer->close();//停止监听
ui->actStart->setEnabled(true);
ui->actStop->setEnabled(false);
LabListen->setText("监听状态：已停止监听");
}
}
void MainWindow::on_actClear_triggered()
{
ui->plainTextEdit->clear();
}
void MainWindow::on_btnSend_clicked()
{
QString msg=ui->editMsg->text();
ui->plainTextEdit->appendPlainText("[out] "+msg);
ui->editMsg->clear();
ui->editMsg->setFocus();
QByteArray str=msg.toUtf8();
str.append("\r\n");//添加一个换行符
tcpSocket->write(str);
readytoline = true;
}
void MainWindow::on_actQuit_triggered()
{
this->close();
}
void MainWindow::creatLineSeries()
{
chartview=new QChartView(this);
chart=new QChart();
chart->setTitle("随机数折线图");
chartview->setChart(chart);
ui->verticalLayout->addWidget(chartview);
QLineSeries *series=new QLineSeries();
series->setName(QStringLiteral("随机数"));
chart->addSeries(series);
for(int i=0;i<buffer->size();i++)
{
// series->append(i,buffer->at(i));
series->append(i,i);
}
QValueAxis *axisX=new QValueAxis;
axisX->setRange(0,10);
axisX->setTitleText("times");
QValueAxis *axisY=new QValueAxis;
axisY->setRange(0,100);
axisY->setTitleText("value");
chart->setAxisX(axisX,series);
chart->setAxisY(axisY,series);
chart->addAxis(axisX,Qt::AlignBottom);
chart->addAxis(axisY,Qt::AlignLeft);
series->attachAxis(axisX);
series->attachAxis(axisY);
readytoline = false;
}