在Qt(以及C++)中,遇到“reference to non-static member function must be called”错误,通常意味着你试图以错误的方式引用或调用非静态成员函数。下面我将详细解释相关概念、原因、解决方法,并提供示例代码。 1. 非静态成员函数的概念 非静态成员函数是类的成员函数,它们依赖于类的实例(对象)来调用。每个对象都有...
Qt开发,一行代码报错: reference to non-static member function must be called; did you mean to call it with no arguments? 代码: if(tbxD.toPlainText().trimmed().length==0) { ... } if(tbxM.toPlainText().trimmed().length==0) { ... } if(tbxS.toPlainText().trimmed().length==0)...
如题,在Qt类中需要用到信号和槽时,需要在类里面加上Q_OBJECT,但是加上之后再编译会报错undefined reference to staticMetaObject,重新编译也不管用,此时选择“执行qmake”,执行完成之后再进行编译就好了。
bool QObject::connect ( const QObject * sender, const char * signal, const char * method, Qt::ConnectionType type = Qt::AutoCompatConnection ) constThis is an overloaded member function, provided for convenience.Connects signal from the sender object to this object's method....
1、检查你最近修改的源文件内部错误。 2、工程设置问题 Qt Creator可能没有反应过来你添加的代码。需要使用Qt Creator的Build->clean all 然后...
Note that this function only does a static check ofprogram; e.g. it does not check whether references to variables are valid, and so on. A typical usage of canEvaluate() is to implement an interactive interpreter forQtScript. The user is repeatedly queried for individual lines of code; th...
Returns true if this object is holding a reference to a null pointer. Performs a static cast from this pointer's type toXand returns aQSharedPointerthat shares the reference. This function can be used for up- and for down-casting, but is more useful for up-casting. ...
#include <type_traits>int main() {static_assert(std::is_same_v<std::remove_reference_t<int&>, int>, "int& becomes int");static_assert(std::is_same_v<std::remove_reference_t<int&&>, int>, "int&& becomes int");} 在这个例子中,std::remove_reference_t<int&>和std::remove_referen...
This is an overloaded member function, provided for convenience.QList<T> QList::fromSet ( const QSet<T> & set ) [static]Returns a QList object with the data contained in set. The order of the elements in the QList is undefined.Example:...
Assigns the other icon to this icon and returns a reference to this icon.Related Non-MembersQDataStream & operator<< ( QDataStream & stream, const QIcon & icon )This is an overloaded member function, provided for convenience.Writes the given icon to the the given stream as a PNG image....