#include <QObject> class MyClass : public QObject { Q_OBJECT // 添加Q_OBJECT宏 public: MyClass(QObject *parent = nullptr); ~MyClass(); signals: void mySignal(); public slots: void mySlot(); }; MyClass::MyClass(QObject *parent) : QObject(parent) { // 构造函数实现 } ...
class CError1 : public QObject { Q_OBJECT signals: void OnButClicked(); }; 类声明加上Q_OBJECT就好了。 class CError1 : public QObject { Q_OBJECT signals: void OnButClicked(); }; class CError2 : public QObject { Q_OBJECT signals: void OnButClicked(); }; class CError2 : public...
简介: error : Class declarations lacks Q_OBJECT macro 直译是:类声明没有Q_OBJECT 宏。 class CError1 : public QObject { signals: void OnButClicked(); }; class CError2 : public QObject { signals: void OnButClicked(); }; class CError1 : public QObject { Q_OBJECT signals: void On...
1. 问题的引出 最近在练习信号和槽的知识,在学习的过程中,报了如下截图所示的错误: 根据报错可知:未添加 Q_OBJECT宏. 2. 问题的解决 只有加入了Q_OBJECT,你才能使用QT中的signal和slot机制。为了使用信号和槽,就必须继承Q_OBJECT. 凡是QObject类(不管是直接子类还是间接子类),都应该在第一行代码写上Q_OBJECT...
Class `NullLineEdit` lacks Q_OBJECT macro C:\git_repos\sqlitebrowser\src\AddRecordDialog.cpp 39 Which looks like this line: sqlitebrowser/src/AddRecordDialog.cpp Line 39 in 37361d8 QAction* nullAction = new QAction(QIcon(":/icons/set_to_null"), tr("Set to NULL"), editContextMen...
Q_object Signals: void onbutclicked (); }; Class Cerror2:public Qobject { Q_object Signals: void onbutclicked (); }; Class Cerror2:public Qobject { Q_object Signals: void onbutclicked (); }; Error:class declarations lacks q_object macro...
V1110. Constructor of a class inherited from 'QObject' does not use a pointer to a parent object. V1111. The index was used without check after it was checked in previous lines. V1112. Comparing expressions with different signedness can lead to unexpected results. V1113. Potential resourc...