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...
Q_OBJECT宏是Qt框架中的一个核心宏,它必须在所有继承自QObject或其子类的类声明中使用。这个宏为类启用了Qt的元对象系统(MetaObject System),该系统提供了信号与槽(signals and slots)机制、对象名称(object names)、属性系统(properties)以及动态对象创建等功能。简而言之,Q_OBJECT宏使得类能够利用Qt提供的许多高级...
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...
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...
Class Cerror1:public Qobject { 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 macroThis...
C++ - Qt undefined reference to vtable, A quick option to solve the problem is to remove the Q_OBJECT macro, this will allow you to compile and test your application, but, not a right choice, if you intend to work every day with QT on CB must configure your environment.. One option...
The point is that the class lacks a copy constructor. When creating the 'C' object, the pointer to the array will be simply copied, which will cause double memory freeing when destroying the objects A and C.A similar trouble will occur when a copy constructor is present but the assignment...
A smart pointer may not destroy an object correctly. V690. The class implements a copy constructor/operator=, but lacks the operator=/copy constructor. V691. Empirical analysis. Possible typo inside the string literal. The 'foo' word is suspicious. V692. Inappropriate attempt to append a ...
Firstly, the work lacks diverse sample datasets, resulting in the generalization ability of the model in general. Secondly, the dual-branch network leads to too many model parameters, increases the complexity of the network, and slows down the training and inference speed of the model. Future ...