C++ 没有用于连接调用的匹配函数-Qt 5.5
当更新信号/插槽函数时，我们会遇到未定义的问题。 这是我们收到的错误：C++ 没有用于连接调用的匹配函数-Qt 5.5,c++,qt,C++,Qt,当更新信号/插槽函数时，我们会遇到未定义的问题。 这是我们收到的错误： 这是以前的情况，工作正常，没有问题： Mainwindow.cpp connect(_restrict, &Restrict::windowChanged, _record, &Record::onWindowChanged); connect(_restrict, &Restrict::windowChanged, _record, &Record::onWindowChanged);
这是以前的情况，工作正常，没有问题： Mainwindow.cpp
connect(_restrict, &Restrict::windowChanged, _record, &Record::onWindowChanged);
connect(_restrict, &Restrict::windowChanged, _record, &Record::onWindowChanged);
private slots:
void onWindowChanged(QDateTime current, QString processName, QString windowTitle, QString url, long prevPID, long currPID);
private slots:
void onWindowChanged(QDateTime current, QString processName, QString windowTitle, QString url, long prevPID, long currPID, bool whitelisted);
public slots:
void onWindowChanged(QDateTime time, QString processName, QString windowTitle, QString url, long prevPID, long currPid);
public slots:
void onWindowChanged(QDateTime time, QString processName, QString windowTitle, QString url, long prevPID, long currPid, bool whitelisted);
signals:
void windowChanged(QDateTime time, QString processName, QString windowTitle, QString url = "", long prevPID = -1, long currPid = -1);
signals:
void windowChanged(QDateTime time, QString processName, QString windowTitle, QString url = "", long prevPID = -1, long currPid = -1, bool whitelisted = false);
更改后的数据： Mainwindow.cpp
connect(_restrict, &Restrict::windowChanged, _record, &Record::onWindowChanged);
connect(_restrict, &Restrict::windowChanged, _record, &Record::onWindowChanged);
private slots:
void onWindowChanged(QDateTime current, QString processName, QString windowTitle, QString url, long prevPID, long currPID);
private slots:
void onWindowChanged(QDateTime current, QString processName, QString windowTitle, QString url, long prevPID, long currPID, bool whitelisted);
public slots:
void onWindowChanged(QDateTime time, QString processName, QString windowTitle, QString url, long prevPID, long currPid);
public slots:
void onWindowChanged(QDateTime time, QString processName, QString windowTitle, QString url, long prevPID, long currPid, bool whitelisted);
signals:
void windowChanged(QDateTime time, QString processName, QString windowTitle, QString url = "", long prevPID = -1, long currPid = -1);
signals:
void windowChanged(QDateTime time, QString processName, QString windowTitle, QString url = "", long prevPID = -1, long currPid = -1, bool whitelisted = false);
出现错误：
\mainwindow.cpp:84:91: error: no matching function for call to 'MainWindow::connect(Restrict*&, void (Restrict::*)(QDateTime, QString, QString, QString, long int, long int, bool), Record*&, void (Record::*)(QDateTime, QString, QString, QString, long int, long int, bool))'
connect(_restrict, &Restrict::windowChanged, _record, &Record::onWindowChanged);
^
\mainwindow.cpp:84:91: note: candidates are:
In file included from \Qt\5.5\mingw492_32\include/QtCore/qabstractanimation.h:37:0,
from \Qt\5.5\mingw492_32\include/QtCore/QtCore:4,
from \Qt\5.5\mingw492_32\include/QtWidgets/QtWidgetsDepends:3,
from \Qt\5.5\mingw492_32\include\QtWidgets/QtWidgets:3,
from \mainwindow.cpp:1:
\Qt\5.5\mingw492_32\include/QtCore/qobject.h:196:36: note: static QMetaObject::Connection QObject::connect(const QObject*, const char*, const QObject*, const char*, Qt::ConnectionType)
static QMetaObject::Connection connect(const QObject *sender, const char *signal,
^
\Qt\5.5\mingw492_32\include/QtCore/qobject.h:196:36: note: no known conversion for argument 2 from 'void (Restrict::*)(QDateTime, QString, QString, QString, long int, long int, bool)' to 'const char*'
\Qt\5.5\mingw492_32\include/QtCore/qobject.h:199:36: note: static QMetaObject::Connection QObject::connect(const QObject*, const QMetaMethod&, const QObject*, const QMetaMethod&, Qt::ConnectionType)
static QMetaObject::Connection connect(const QObject *sender, const QMetaMethod &signal,
^
\Qt\5.5\mingw492_32\include/QtCore/qobject.h:199:36: note: no known conversion for argument 2 from 'void (Restrict::*)(QDateTime, QString, QString, QString, long int, long int, bool)' to 'const QMetaMethod&'
\Qt\5.5\mingw492_32\include/QtCore/qobject.h:475:32: note: QMetaObject::Connection QObject::connect(const QObject*, const char*, const char*, Qt::ConnectionType) const
inline QMetaObject::Connection QObject::connect(const QObject *asender, const char *asignal,
^
\Qt\5.5\mingw492_32\include/QtCore/qobject.h:475:32: note: no known conversion for argument 2 from 'void (Restrict::*)(QDateTime, QString, QString, QString, long int, long int, bool)' to 'const char*'
\Qt\5.5\mingw492_32\include/QtCore/qobject.h:213:43: note: template<class Func1, class Func2> static QMetaObject::Connection QObject::connect(const typename QtPrivate::FunctionPointer<Func>::Object*, Func1, const typename QtPrivate::FunctionPointer<Func2>::Object*, Func2, Qt::ConnectionType)
static inline QMetaObject::Connection connect(const typename QtPrivate::FunctionPointer<Func1>::Object *sender, Func1 signal,
^
\Qt\5.5\mingw492_32\include/QtCore/qobject.h:213:43: note: template argument deduction/substitution failed:
\Qt\5.5\mingw492_32\include/QtCore/qobject.h: In substitution of 'template<class Func1, class Func2> static QMetaObject::Connection QObject::connect(const typename QtPrivate::FunctionPointer<Func>::Object*, Func1, const typename QtPrivate::FunctionPointer<Func2>::Object*, Func2, Qt::ConnectionType) [with Func1 = void (Restrict::*)(QDateTime, QString, QString, QString, long int, long int, bool); Func2 = void (Record::*)(QDateTime, QString, QString, QString, long int, long int, bool)]':
\mainwindow.cpp:84:91: required from here
\Qt\5.5\mingw492_32\include/QtCore/qobject.h:213:43: error: no type named 'Object' in 'struct QtPrivate::FunctionPointer<void (Record::*)(QDateTime, QString, QString, QString, long int, long int, bool)>'
\Qt\5.5\mingw492_32\include/QtCore/qobject.h:245:13: note: template<class Func1, class Func2> static typename QtPrivate::QEnableIf<((int)(QtPrivate::FunctionPointer<Func2>::ArgumentCount) >= 0), QMetaObject::Connection>::Type QObject::connect(const typename QtPrivate::FunctionPointer<Func>::Object*, Func1, Func2)
connect(const typename QtPrivate::FunctionPointer<Func1>::Object *sender, Func1 signal, Func2 slot)
^
\Qt\5.5\mingw492_32\include/QtCore/qobject.h:245:13: note: template argument deduction/substitution failed:
\mainwindow.cpp:84:91: note: candidate expects 3 arguments, 4 provided
connect(_restrict, &Restrict::windowChanged, _record, &Record::onWindowChanged);
^
In file included from \Qt\5.5\mingw492_32\include/QtCore/qabstractanimation.h:37:0,
from \Qt\5.5\mingw492_32\include/QtCore/QtCore:4,
from \Qt\5.5\mingw492_32\include/QtWidgets/QtWidgetsDepends:3,
from \Qt\5.5\mingw492_32\include\QtWidgets/QtWidgets:3,
from \mainwindow.cpp:1:
\Qt\5.5\mingw492_32\include/QtCore/qobject.h:254:13: note: template<class Func1, class Func2> static typename QtPrivate::QEnableIf<(((int)(QtPrivate::FunctionPointer<Func2>::ArgumentCount) >= 0) && (! QtPrivate::FunctionPointer<Func2>::IsPointerToMemberFunction)), QMetaObject::Connection>::Type QObject::connect(const typename QtPrivate::FunctionPointer<Func>::Object*, Func1, const QObject*, Func2, Qt::ConnectionType)
connect(const typename QtPrivate::FunctionPointer<Func1>::Object *sender, Func1 signal, const QObject *context, Func2 slot,
^
\Qt\5.5\mingw492_32\include/QtCore/qobject.h:254:13: note: template argument deduction/substitution failed:
\Qt\5.5\mingw492_32\include/QtCore/qobject.h: In substitution of 'template<class Func1, class Func2> static typename QtPrivate::QEnableIf<(((int)(QtPrivate::FunctionPointer<Func2>::ArgumentCount) >= 0) && (! QtPrivate::FunctionPointer<Func2>::IsPointerToMemberFunction)), QMetaObject::Connection>::Type QObject::connect(const typename QtPrivate::FunctionPointer<Func>::Object*, Func1, const QObject*, Func2, Qt::ConnectionType) [with Func1 = void (Restrict::*)(QDateTime, QString, QString, QString, long int, long int, bool); Func2 = void (Record::*)(QDateTime, QString, QString, QString, long int, long int, bool)]':
\mainwindow.cpp:84:91: required from here
\Qt\5.5\mingw492_32\include/QtCore/qobject.h:254:13: error: invalid use of incomplete type 'struct QtPrivate::QEnableIf<false, QMetaObject::Connection>'
In file included from \Qt\5.5\mingw492_32\include/QtCore/qnamespace.h:37:0,
from \Qt\5.5\mingw492_32\include/QtCore/qobjectdefs.h:41,
from \Qt\5.5\mingw492_32\include/QtCore/qobject.h:40,
from \Qt\5.5\mingw492_32\include/QtCore/qabstractanimation.h:37,
from \Qt\5.5\mingw492_32\include/QtCore/QtCore:4,
from \Qt\5.5\mingw492_32\include/QtWidgets/QtWidgetsDepends:3,
from \Qt\5.5\mingw492_32\include\QtWidgets/QtWidgets:3,
from \mainwindow.cpp:1:
\Qt\5.5\mingw492_32\include/QtCore/qglobal.h:1073:45: error: declaration of 'struct QtPrivate::QEnableIf<false, QMetaObject::Connection>'
template <bool B, typename T = void> struct QEnableIf;
^
In file included from \Qt\5.5\mingw492_32\include/QtCore/qabstractanimation.h:37:0,
from \Qt\5.5\mingw492_32\include/QtCore/QtCore:4,
from \Qt\5.5\mingw492_32\include/QtWidgets/QtWidgetsDepends:3,
from \Qt\5.5\mingw492_32\include\QtWidgets/QtWidgets:3,
from \mainwindow.cpp:1:
\Qt\5.5\mingw492_32\include/QtCore/qobject.h:285:13: note: template<class Func1, class Func2> static typename QtPrivate::QEnableIf<(QtPrivate::FunctionPointer<Func2>::ArgumentCount == (-1)), QMetaObject::Connection>::Type QObject::connect(const typename QtPrivate::FunctionPointer<Func>::Object*, Func1, Func2)
connect(const typename QtPrivate::FunctionPointer<Func1>::Object *sender, Func1 signal, Func2 slot)
^
\Qt\5.5\mingw492_32\include/QtCore/qobject.h:285:13: note: template argument deduction/substitution failed:
\mainwindow.cpp:84:91: note: candidate expects 3 arguments, 4 provided
connect(_restrict, &Restrict::windowChanged, _record, &Record::onWindowChanged);
^
In file included from \Qt\5.5\mingw492_32\include/QtCore/qabstractanimation.h:37:0,
from \Qt\5.5\mingw492_32\include/QtCore/QtCore:4,
from \Qt\5.5\mingw492_32\include/QtWidgets/QtWidgetsDepends:3,
from \Qt\5.5\mingw492_32\include\QtWidgets/QtWidgets:3,
from \mainwindow.cpp:1:
\Qt\5.5\mingw492_32\include/QtCore/qobject.h:293:13: note: template<class Func1, class Func2> static typename QtPrivate::QEnableIf<(QtPrivate::FunctionPointer<Func2>::ArgumentCount == (-1)), QMetaObject::Connection>::Type QObject::connect(const typename QtPrivate::FunctionPointer<Func>::Object*, Func1, const QObject*, Func2, Qt::ConnectionType)
connect(const typename QtPrivate::FunctionPointer<Func1>::Object *sender, Func1 signal, const QObject *context, Func2 slot,
^
\Qt\5.5\mingw492_32\include/QtCore/qobject.h:293:13: note: template argument deduction/substitution failed:
\Qt\5.5\mingw492_32\include/QtCore/qobject.h: In substitution of 'template<class Func1, class Func2> static typename QtPrivate::QEnableIf<(QtPrivate::FunctionPointer<Func2>::ArgumentCount == (-1)), QMetaObject::Connection>::Type QObject::connect(const typename QtPrivate::FunctionPointer<Func>::Object*, Func1, const QObject*, Func2, Qt::ConnectionType) [with Func1 = void (Restrict::*)(QDateTime, QString, QString, QString, long int, long int, bool); Func2 = void (Record::*)(QDateTime, QString, QString, QString, long int, long int, bool)]':
\mainwindow.cpp:84:91: required from here
\mainwindow.cpp:84:91:错误：调用“mainwindow:：connect（Restrict*&，void（Restrict:*）（QDateTime，QString，QString，QString，long int，long int，bool），Record*&，void（Record:*）（QDateTime，QString，QString，long int，long int，bool））没有匹配的函数
连接（_restrict，&restrict:：windowChanged，_record，&record:：onWindowChanged）；
^
\mainwindow.cpp:84:91:注：候选人包括：
在\Qt\5.5\mingw492\u 32\include/QtCore/qabstractanimation.h:37:0中包含的文件中，
从\Qt\5.5\mingw492\u 32\include/QtCore/QtCore:4，
从\Qt\5.5\mingw492_32\include/QtWidgets/QtWidgetsDepends:3，
从\Qt\5.5\mingw492\u 32\include\qtwidts/qtwidts:3，
从\mainwindow.cpp:1：
\Qt\5.5\mingw492\u 32\include/QtCore/qobject.h:196:36：注意：静态QMetaObject:：Connection qobject:：connect（const qobject*，const char*，const qobject*，const char*，Qt:：ConnectionType）
静态QMetaObject:：连接连接（常量QObject*发送方，常量字符*信号，
^
\Qt\5.5\mingw492\u 32\include/QtCore/qobject.h:196:36：注意：参数2没有已知的从“void（Restrict:*）（QDateTime，QString，QString，QString，long int，bool）”到“const char*”的转换
\Qt\5.5\mingw492\u 32\include/QtCore/qobject.h:199:36：注意：静态QMetaObject:：Connection qobject:：connect（const qobject*，const QMetaMethod&，const qobject*，const QMetaMethod&，Qt:：ConnectionType）
静态QMetaObject:：连接连接（const QObject*发送方，const QMetaMethod&signal，
^
\Qt\5.5\mingw492\u 32\include/QtCore/qobject.h:199:36：注意：参数2没有已知的从“void（Restrict:*）（QDateTime，QString，QString，QString，long int，bool）”到“const QMetaMethod&”的转换
\Qt\5.5\mingw492\u 32\include/QtCore/qobject.h:475:32：注意：QMetaObject:：Connection qobject:：Connection（const qobject*，const char*，const char*，Qt:：ConnectionType）const
内联QMetaObject:：Connection QObject:：connect（const QObject*asender，const char*asignal，
^
\Qt\5.5\mingw492\u 32\include/QtCore/qobject.h:475:32：注意：参数2没有已知的从“void（Restrict:*）（QDateTime，QString，QString，QString，long int，bool）”到“const char*”的转换
\Qt\5.5\mingw492\u 32\include/QtCore/qobject.h:213:43：注意：模板静态QMetaObject:：Connection qobject:：connect（常量类型名QtPrivate:：FunctionPointer:：Object*，Func1，常量类型名QtPrivate:：FunctionPointer:：Object*，Func2，Qt:：ConnectionType）
静态内联QMetaObject:：连接连接（const typename QtPrivate:：FunctionPointer:：Object*sender，Func1信号，
^
\Qt\5.5\mingw492\u 32\include/QtCore/qobject.h:213:43:注意：模板参数推导/替换失败：
\Qt\5.5\mingw492\u 32\include/QtCore/qobject.h：替换“模板静态QMetaObject:：Connection qobject:：connect（常量类型名QtPrivate:：FunctionPointer:：Object*，Func1，常量类型名QtPrivate:：FunctionPointer:：Object*，Func2，Qt:：ConnectionType）[与Func1=void（Restrict:*）（QDateTime，QString，QString，QString，long int，long int，bool）；Func2=void（记录：：*）（QDateTime，QString，QString，QString，long int，long int，bool）]：
\mainwindow.cpp:84:91:从此处开始需要
\Qt\5.5\mingw492\u 32\include/QtCore/qobject.h:213:43:错误：“struct QtPrivate:：FunctionPointer”中没有名为“Object”的类型
\Qt\5.5\mingw492\u 32\include/QtCore/qobject.h:245:13：注意：模板静态类型名QtPrivate:：QEnableIf=0），QMetaObject:：Connection>：：类型qobject:：connect（const类型名QtPrivate:：FunctionPointer:：Object*，Func1，Func2）
connect（常量类型名QtPrivate:：函数指针：：对象*发送方，Func1信号，Func2插槽）
^
\Qt\5.5\mingw492\u 32\include/QtCore/qobject.h:245:13:注意：模板参数推导/替换失败：
\mainwindow.cpp:84:91:注意：候选者需要3个参数，提供4个参数
连接（_restrict，&restrict:：windowChanged，_record，&record:：onWindowChanged）；
^
在\Qt\5.5\mingw492\u 32\include/QtCore/qabstractanimation.h:37:0中包含的文件中，
从\Qt\5.5\mingw492\u 32\include/QtCore/QtCore:4，
从\Qt\5.5\mingw492_32\include/QtWidgets/QtWidgetsDepends:3，
从\Qt\5.5\mingw492\u 32\include\qtwidts/qtwidts:3，
从\mainwindow.cpp:1：
\Qt\5.5\mingw492\u 32\include/QtCore/qobject.h:254:13：注意：模板静态类型名QtPrivate:：QEnableIf=0）和（！QtPrivate:：FunctionPointer:：ispointertomberfunction）），QMetaObject:：Connection>：：类型qobject:：connect（常量类型名QtPrivate:：FunctionPointer:：Object*，Func1，常量qobject*，Func2，Qt:：ConnectionType）
connect（常量类型名称QtPrivate:：FunctionPointer:：Object*发送方，Func1信号，常量QObject*上下文，Func2插槽，
^
\Qt\5.5\mingw492_32\include/QtCore/qobject.h:254:13:注意：模板参数推导/替换失败：
\Qt\5.5\mingw492\u 32\include/QtCore/qobject.h：用Func1替换“模板静态类型名QtPrivate:：QEnableIf=0”&（！QtPrivate:：FunctionPointer:：IsPointerToMemberFunction）），QMetaObject:：Connection>：类型qobject:：connect（常量类型名QtPrivate:：FunctionPointer:：Object*，Func1，常量qobject*，Func2，Qt:：ConnectionType）[=