求助！ udp多線程的問題

我做了個udp接收的測試程序，剛開始能收到數據，收了幾條數據之后就報個錯:

QSocketNotifier:?Socket?notifiers?cannot?be?enabled?or?disabled?from?another?thread

然后程序就收不到數據了，但是程序沒有崩潰。用的是qt5.4

各位能幫我看下嗎，感激不盡！

代碼如下：

mainwindow.h

#ifndef?MAINWINDOW_H

#define?MAINWINDOW_H

#include?

#include?"udpthread.h"

namespace?Ui?{

class?MainWindow;

}

class?MainWindow?:?public?QMainWindow

{

Q_OBJECT

public:

explicit?MainWindow(QWidget?*parent?=?0);

~MainWindow();

public?slots:

void?showmessages(QString?messages);

private?slots:

void?on_pushButton_clicked();

private:

Ui::MainWindow?*ui;

UdpThread?*myUdpThread;

};

#endif?//?MAINWINDOW_H

udpthread.h

#ifndef?UDPTHREAD_H

#define?UDPTHREAD_H

#include?

#include?

#include?

class?UdpThread?:?public?QThread

{

Q_OBJECT

public:

UdpThread(QObject?*parent=0);

~UdpThread();

void?run()Q_DECL_OVERRIDE;

signals:

void?showmessages(QString?messages);

private?slots:

void?readPendingDatagrams();

private:

QUdpSocket?*myUdpSocket;

};

#endif?//?UDPTHREAD_H

mainwindow.cpp

#include?"mainwindow.h"

#include?"ui_mainwindow.h"

#include?

MainWindow::MainWindow(QWidget?*parent)?:

QMainWindow(parent),

ui(new?Ui::MainWindow)

{

ui->setupUi(this);

}

MainWindow::~MainWindow()

{

delete?ui;

}

void?MainWindow::showmessages(QString?messages)????//顯示數據

{

ui->textEdit->append(messages);

}

void?MainWindow::on_pushButton_clicked()?????//開啟udp

{

myUdpThread=new?UdpThread(this);

connect(myUdpThread,?SIGNAL(showmessages(QString)),

this,?SLOT(showmessages(QString)));

myUdpThread->start();

}

udpthread.cpp

#include?"udpthread.h"

#include?

UdpThread::UdpThread(QObject?*parent)

:QThread(parent)

{

}

UdpThread::~UdpThread()

{

this->myUdpSocket->deleteLater();

quit();

wait();

}

void?UdpThread::run()

{

qDebug()<

myUdpSocket=new?QUdpSocket();

if(myUdpSocket->bind(60004,?QUdpSocket::ShareAddress?|??//綁定

QUdpSocket::ReuseAddressHint?)){

qDebug()<

}

else?{

qDebug()<

return;

}

connect(myUdpSocket,?SIGNAL(readyRead()),

this,?SLOT(readPendingDatagrams()));

exec();

}

void?UdpThread::readPendingDatagrams()

{

while(myUdpSocket->hasPendingDatagrams()){

QByteArray?datagram;

datagram.resize(myUdpSocket->pendingDatagramSize());

qDebug()<

myUdpSocket->readDatagram(datagram.data(),?datagram.size());?//接收數據(根據qDebug信息，就是執行這條語句報錯!!!)

qDebug()<

emit?showmessages(datagram);?//顯示數據

}

}

下面是調試信息：

run

bind_success

readPendingDatagrams-1

readPendingDatagrams-2

readPendingDatagrams-1

readPendingDatagrams-2

readPendingDatagrams-1

readPendingDatagrams-2

readPendingDatagrams-1

readPendingDatagrams-2

readPendingDatagrams-1

readPendingDatagrams-2

readPendingDatagrams-1

QSocketNotifier:?Socket?notifiers?cannot?be?enabled?or?disabled?from?another?thread

readPendingDatagrams-2

------解決思路----------------------

你的signal是另外一個線程發出的??而你的UI是主線程??主線程里不要綁定非UI線程的signal??而應該受到這個signal后?再次拋出一個signal去調用主線程的slot

------解決思路----------------------

目測這樣寫應該可以解決問題.

connect(myUdpSocket,?SIGNAL(readyRead()),

this,?SLOT(readPendingDatagrams()),?Qt::DirectConnection);

總結

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