There is no such slot - 'display(5)'. (But there is 'display(int)')Parameters to slots are automatically passed from signals. As there is no 'clicked(int)', it would be best for you to create a new class derived from QLCDNumber and create a new slot in it. Something like the code below: Application Example | Qt Widgets 5.9 The public API is restricted to the constructor. In the protected section, we reimplement QWidget::closeEvent() to detect when the user attempts to close the window, and warn the user about unsaved changes. In the private slots section, we declare slots that correspond to menu entries, as well as a mysterious documentWasModified() slot. Finally, in the private section of the class, we have ... QObject::connect: No such slot QWidget::* in - aiuxian.com QObject::connect: No such slot QWidget::* in * 共有140篇相关文章:QT 4.7 控件间 互相发送消息例子 QT4:example5 QT4:example6 Q_OBJECT宏的作用 qt,spinbox slider Q_OBJECT宏的作用 qt QTreeWidget使用 qt-spinBos-splider 学习Qt，Getting started Qt学习例子1——HelloWorld 在QT中添加右键菜单 . [转]QT右键菜单及位置捕捉问题 Qt的右键菜单及位置 ... user interface - QT: No Such Slot - Stack Overflow I was incorrectly trying to pass a parameter to my slot without a QSignalMapper, which I learned from this SO post. Removing all parameters to the slot function (.h and .cpp) allowed the callback to be found and called. Yes, I'm a Qt n00b. Time to refactor with QSignalMapper :) HTH
在类的声明中没有加上宏：Q_OBJECT 例如： class NoticePage : public QWidget { Q_OBJECT /*your code*/ }; 关于 Q_OBJECT的作用，Qt帮助文档中就有详细介绍，这里不赘叙。鼠标点 Q_OBJECT按F1即可查看。
The QObject QObject is the base class to most Qt classes. Examples of exceptions are: Classes that need to be lightweight such as graphical primitives Data containers (QString, QList, QChar, etc) Subclassing QWidget | C++ GUI Programming with Qt4: Creating ... Subclassing QWidget. Many custom widgets are simply a combination of existing widgets, whether they are built-in Qt widgets or other custom widgets such as HexSpinBox. Custom widgets that are built by composing existing widgets can usually be developed in Qt Designer: Create a new form using the "Widget" template. QWidget Class | Qt Widgets 5.12.3
[SOLVED] Simple QT Question: Connecting Widgets to Slots
The signal should be overloaded with another signal that includes a QSize parameter instead of the two int parameters (suggestions made by looking at the QWidget::resize() prototypes). The best use case is actually.. any. Having such signal would allow developers to resize a QLabel, a QLineEdit, ect. with a simple signal-slot connection.
QWidget Class | Qt Widgets 5.6
When populating a stacked widget, the widgets are added to an internal list. The indexOf() function returns the index of a widget in that list. The widgets can either be added to the end of the list using the addWidget() function, or inserted at a given index using the insertWidget() function. Problems with Signals & Slots of QT - C / C++ - Byte No such slot QWidget::addPerson()" As u can see this means not GUI, but QWidget. But why? I really cant find the mistake. A friend of mine did the same in another program and it worked. Hope u can help me. Well, your question is actually off-topic here. in comp.lang.c++, we only discuss ISO C++, which doesn't include Qt or signals and slots.
user interface - QT: No Such Slot - Stack Overflow
[Résolu] [QT]Object::connect: No such slot QWidget ... Le signaux et les slots, ça n'existe pas nativement dans le C++. C'est une surcouche que Qt ajoute. Ainsi, pour que ça marche correctement, il faut ajouter quelques lignes de codes supplémentaires. QWidget Class | Qt Widgets 5.6 Since Qt 4.0, QWidget automatically double-buffers its painting, ... If there is no such QLayout, the result of this function is used. The default policy is Preferred/Preferred, which means that the widget can be freely resized, ... [slot] void QWidget:: hide Hides the widget. QObject::connect: No such slot QWidget::* in * - 程序园 Object::connect: No such slot ; 2. Qt error: no such slot ; 3. QWidget no such file or dir ; 4. Object::connect: No such slot 槽丢失问题 ... QWidget no such file no-such No such no such partition no such Column libmodules No such f eth0 no such device No such file no such file directo SIOCADDRT no such pr No such file qwidget such slot ... QWidget — Qt for Python
QWidget — Qt for Python When a widget is used as a container to group a number of child widgets, it is known as a composite widget. These can be created by constructing a widget with the required visual properties - a QFrame, for example - and adding child widgets to it, usually managed by a layout.The above diagram shows such a composite widget that was created using Qt Designer.