no such slot Qt错误

2013-05-08 11:28:25 324 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

QT开发陷阱 | 深入解析No such slot错误及其修复策略本文深入解析QT开发中常见的'No such slot'错误，详细分析其成因并提供实用修复策略。从Q_OBJECT宏缺失到slot函数声明位置错误，再到拼写问题，全面覆盖各类陷阱。同时介绍高级排查技巧如moc文件验证和新式连接语法，帮助开发者高效解决信号槽相关问题。阅读详情

在编译Qt程序的时候出现No such slot ....的错误有Q_OBJECT
Widget::Widget(QWidget *parent) :
QWidget(parent),
ui(new Ui::Widget)
{
ui->setupUi(this);

this->setWindowFlags(Qt::FramelessWindowHint);//去掉标题栏
QPalette palette1=this->palette();
palette1.setBrush(QPalette::Window,QBrush(QPixmap("./images/background.png")));
this->setPalette(palette1);
this->setAutoFillBackground(true);
//加入背景图片
myCom = new Posix_QextSerialPort("/dev/ttyS0",QextSerialBase::Polling);//定义串口对象，指定串口名和查询模式

this->threadSendMessage =new ThreadSendMessage;
this->threadSendMessage->start();
QObject::connect(threadSendMessage, SIGNAL(send1(QString)),
threadSendMessage, SLOT(sendmotor(QString)));
QObject::connect(threadSendMessage, SIGNAL(send2(QString)),
threadSendMessage, SLOT(sendbuzzer(QString)));

class Widget : public QWidget {
Q_OBJECT
public:
Widget(QWidget *parent = 0);
~Widget();

protected:
void changeEvent(QEvent *e);

public:
Ui::Widget *ui;
Posix_QextSerialPort *myCom;
ThreadSendMessage *threadSendMessage;
QTimer *readTimer;
QTimer *readTimer1;
QTimer *readTimer3;
QTimer *readTimer2;
//int SendMsg();
//void addNum(char key);
public slots:
void sendmotor(QString);
void sendbuzzer(QString);

程序片段在这了求教各位大侠

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