虚析构函数没有显式声明。在Dialog头文件中添加：virtual Dialog::~Dialog();试试。我不确定产生这个错误的具体原因。
-Wimplicit-retain-self "block implicitly retains 'self' explicitly mention 'self' to indicate this is intended behavior -Wincompatible-library-redeclaration incompatible redeclaration of library function %0 -Wincomplete-implementation method definition for %0 not found -Winherited-variadic-ctor inheriting...
Hybrid script/C++: A script can connect signals and slots to establish connections between pre-defined objects that the application exposes to the scripting environment. In this scenario, the slots themselves are still written in C++, but the definition of the connections is fully dynamic (script-...
The signal handler must be declared within the definition of the object that emits the signal, and the handler should contain the block of JavaScript code to be executed when the signal handler is invoked. For example, the onClicked signal handler below is declared within the MouseArea object ...
(CLASS_NAME)orqt.insertAllSlotImplementations()is called. The call to the function will effectively insert the code at that point in the code. This is useful when you want to use objects that are defined after the definition of this object. Inside the body,thisis implicitly defined and will...
POSIX uses a somewhat different definition of reentrancy and thread-safety for its C APIs. When dealing with an object-oriented C++ class library such as Qt, the definitions must be adapted.Most C++ classes are inherently reentrant, since they typically only reference member data. Any thread can...
definition. A signal may be explicitly attached to aslot, a signal handler function, by theQObject::connect()method; or as happens here, is implicitly associated with QML where QML code that uses the property will automatically update when the signal is emitted. These methods are declared in...
The class definition for a givenQObjectmust have a constructor of formQ_INVOKABLE Foo(QObject* parent = nullptr). An ElementType that does not have this form of constructor will trigger undefined behaviour wheninsertRowsis called. Member Type Documentation ...
By default, this property contains a size in which both width and height have values of 16777215.Note: The definition of the QWIDGETSIZE_MAX macro limits the maximum size of widgets. Access functions:QSize maximumSize() const void setMaximumSize(const QSize &) void setMaximumSize(int maxw...
()' is implicitly deleted because the default definition would be ill-formed: class RunFunctionTask : public RunFunctionTaskBase<T> ^~~~ /usr/include/qt/QtConcurrent/qtconcurrentrunbase.h:96:7: error: no matching function for call to 'QtPromise::QPromise<QString>::QPromise()' In file inc...