C:\Users\48318\Desktop\Qt\2048\interface_44.cpp:35: error: static assertion failed: Signal and slot arguments are not compatible. In file included from C:\Qt\5.15.2\mingw81_64\include/QtGui/qtguiglobal.h:43, from C:\Qt\5.15.2\mingw81_64\include/QtWidgets/qtwidgetsglobal.h:43, from C:\Qt\5.15.2\mingw81_64\include\QtWidgets/qmainwindow.h:43, from C:\Qt\5.15.2\mingw81_64\include\QtWidgets/QMainWindow:1, from ..\2048\interface_44.h:4, from ..\2048\interface_44.cpp:1: C:\Qt\5.15.2\mingw81_64\include/QtCore/qobject.h: In instantiation of 'static QMetaObject::Connection QObject::connect(const typename QtPrivate::FunctionPointer<Func>::Object*, Func1, const typename QtPrivate::FunctionPointer<Func2>::Object*, Func2, Qt::ConnectionType) [with Func1 = void (QTimer::*)(QTimer::QPrivateSignal); Func2 = void (Interface_44::*)(QTimerEvent*); typename QtPrivate::FunctionPointer<Func>::Object = QTimer; typename QtPrivate::FunctionPointer<Func2>::Object = Interface_44]': ..\2048\interface_44.cpp:35:69: required from here C:\Qt\5.15.2\mingw81_64\include/QtCore/qglobal.h:121:63: error: static assertion failed: Signal and slot arguments are not compatible. # define Q_STATIC_ASSERT_X(Condition, Message) static_assert(bool(Condition), Message) ^~~~~~~~~~~~~~~ C:\Qt\5.15.2\mingw81_64\include/QtCore/qobject.h:255:9: note: in expansion of macro 'Q_STATIC_ASSERT_X' Q_STATIC_ASSERT_X((QtPrivate::CheckCompatibleArguments<typename SignalType::Arguments, typename SlotType::Arguments>::value), ^~~~~~~~~~~~~~~~~
时间: 2024-03-11 16:50:45 浏览: 37
这个错误通常是由于信号和槽之间的参数不匹配导致的。请确保你的信号和槽的参数类型和数量都是匹配的。在这种情况下,错误信息指出 `Signal and slot arguments are not compatible.`,因此你需要检查你的信号和槽的参数类型是否匹配。
同时,你在连接信号和槽时,需要传递指向成员函数的指针,而不是直接传递成员函数名。例如:
```c++
connect(timer, &QTimer::timeout, this, &YourClass::timerEvent);
```
其中,`&YourClass::timerEvent` 是指向 `YourClass` 类中的 `timerEvent()` 成员函数的指针。请确保你的信号和槽的参数类型匹配,并正确地传递指向成员函数的指针。
相关问题
error: (-215:Assertion failed) !_img.empty() in function 'imwrite'
根据引用中提到的信息,"error: (-215:Assertion failed) !_img.empty() in function 'imwrite'"是由于在视频分帧保存为图片时出现的问题。这个错误通常发生在没有正确检查帧是否为空的情况下尝试写入图片时。解决这个问题的方法是在写入图片之前添加一个判断条件,确保帧不为空。具体来说,你可以在写入图片之前添加以下代码:
```
if not _img.empty():
cv2.imwrite('path_to_save_image.jpg', _img)
```
这样做可以避免出现"error: (-215:Assertion failed) !_img.empty() in function 'imwrite'"的错误。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
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[ .reference_list ]
error: static assertion failed: std::map must have the same value_type as its allocator
这个错误通常是因为 `std::map` 的值类型与它的分配器不匹配。在 `std::map<Key, T, Compare, Allocator>` 中,`Allocator` 类型默认为 `std::allocator<std::pair<const Key, T>>`,这意味着它需要分配的是 `std::pair<const Key, T>` 类型的对象。因此,如果你使用的是不同于 `std::allocator` 的分配器,并且它的值类型不是 `std::pair<const Key, T>`,那么就会出现这个错误。
要解决这个问题,你需要使用一个与 `std::map` 一致的分配器,或者在创建 `std::map` 实例时显式指定一个分配器。例如,如果你想使用 `boost::pool_allocator` 作为分配器,你可以这样声明 `std::map`:
```cpp
std::map<Key, T, Compare, boost::pool_allocator<std::pair<const Key, T>>> my_map;
```
这样就可以避免这个错误。