Qt moc_file 问题
我是一名学生程序员,我正在使用 Qt 构建一些 GUI 应用程序来工作,并且我一次又一次地遇到 moc 问题。我希望能够解决我目前遇到的问题;但是,如果任何更熟悉 Qt 的人可以阐明如何在更改 cpp 文件时正确处理这些文件,我将不胜感激。在我最近的更改中(抱歉,我无法发布它的样子,因为它显然已经被重组),我通过在 checkData 函数中嵌套一个函数来验证数据。因为我希望为每个可能无效的字段显示特定错误,所以我开始为每个 QLineEdit 创建一个函数。我意识到这不会起作用(或者至少会做更多的工作),而不是仅仅提供有序的信息检查。下面是没有原始嵌套函数的新代码:
void InjectionDialog::checkData() {
bool validateFluidVelocity;
QString tempStrFluidVelocity;
tempStrFluidVelocity = ui->lineEditFluidVelocity->text();
double convertedFluidVelocity =
tempStrFluidVelocity.toDouble(&validateFluidVelocity);
if (validateFluidVelocity == false) {
QErrorMessage validateErrorFluidVelocityError;
validateErrorFluidVelocityError.
showMessage("Fluid velocity input is invalid");
validateErrorFluidVelocityError.exec();
}
else {
transData.lineEditFluidVelocity = convertedFluidVelocity;
}
bool validateFluidMassFlow;
QString tempStrFluidMassFlow;
tempStrFluidMassFlow = ui->lineEditFluidMassFlow->text();
double convertedFluidMassFlow =
tempStrFluidMassFlow.toDouble(&validateFluidMassFlow);
if (validateFluidMassFlow == false) {
QErrorMessage validateErrorFluidMassFlowError;
validateErrorFluidMassFlowError.
showMessage("Fluid mass flow input is invalid");
validateErrorFluidMassFlowError.exec();
}
else {
transData.lineEditFluidMassFlow = convertedFluidMassFlow;
}
bool validateParticleVelocity;
QString tempStrParticleVelocity;
tempStrParticleVelocity = ui->lineEditParticleVelocity->text();
double convertedParticleVelocity =
tempStrParticleVelocity.toDouble(&validateParticleVelocity);
if (validateParticleVelocity == false) {
QErrorMessage validateErrorParticleVelocity;
validateErrorParticleVelocity.
showMessage("Particle velocity input is invalid");
validateErrorParticleVelocity.exec();
}
else {
transData.lineEditParitcle_sic_Velocity = convertedParticleVelocity;
}
bool validateParticleMassFlow;
QString tempStrParticleMassFlow;
tempStrParticleMassFlow = ui->lineEditParticleMassFlow->text();
double convertedParticleMassFlow =
tempStrParticleMassFlow.toDouble(&validateParticleMassFlow);
if (validateParticleMassFlow == false) {
QErrorMessage validateErrorParticleMassFlow;
validateErrorParticleMassFlow.
showMessage("Particle mass flow input is invalid");
validateErrorParticleMassFlow.exec();
}
else {
transData.lineEditParticleMassFlow = convertedParticleMassFlow;
}
}
最初我使用 InjectionDialog::checkFluidVelociy 进行第一次检查,但很快就决定不这样做。现在,代码重组后,我收到错误:
在函数 'InjectionDialog::checkFluidVelocity(QMetaObject::Call, int, void**)' 中: 此错误引用了 moc_injectionDialog.o
对“InjectionDialog::checkFluidVelocity()”的未识别引用 此错误引用了 moc_injectiondialog.cpp
在 moc_injectiondialog 中,我有以下内容 我列出了以下内容:
/****************************************************************************
** Meta object code from reading C++ file 'injectiondialog.h'
**
** Created: Sat Jan 7 21:58:22 2012
** by: The Qt Meta Object Compiler version 62 (Qt 4.7.4)
**
** WARNING! All changes made in this file will be lost!
*****************************************************************************/
#include "../InjectionGUI/injectiondialog.h"
#if !defined(Q_MOC_OUTPUT_REVISION)
#error "The header file 'injectiondialog.h' doesn't include <QObject>."
#elif Q_MOC_OUTPUT_REVISION != 62
#error "This file was generated using the moc from 4.7.4. It"
#error "cannot be used with the include files from this version of Qt."
#error "(The moc has changed too much.)"
#endif
QT_BEGIN_MOC_NAMESPACE
static const uint qt_meta_data_InjectionDialog[] = {
// content:
5, // revision
0, // classname
0, 0, // classinfo
2, 14, // methods
0, 0, // properties
0, 0, // enums/sets
0, 0, // constructors
0, // flags
0, // signalCount
// slots: signature, parameters, type, tag, flags
17, 16, 16, 16, 0x08,
29, 16, 16, 16, 0x08,
0 // eod
};
static const char qt_meta_stringdata_InjectionDialog[] = {
"InjectionDialog\0\0checkData()\0"
"checkFluidVelocity()\0"
};
const QMetaObject InjectionDialog::staticMetaObject = {
{ &QDialog::staticMetaObject, qt_meta_stringdata_InjectionDialog,
qt_meta_data_InjectionDialog, 0 }
};
#ifdef Q_NO_DATA_RELOCATION
const QMetaObject &InjectionDialog::getStaticMetaObject() { return staticMetaObject; }
#endif //Q_NO_DATA_RELOCATION
const QMetaObject *InjectionDialog::metaObject() const
{
return QObject::d_ptr->metaObject ? QObject::d_ptr->metaObject : &staticMetaObject;
}
void *InjectionDialog::qt_metacast(const char *_clname)
{
if (!_clname) return 0;
if (!strcmp(_clname, qt_meta_stringdata_InjectionDialog))
return static_cast<void*>(const_cast< InjectionDialog*>(this));
return QDialog::qt_metacast(_clname);
}
int InjectionDialog::qt_metacall(QMetaObject::Call _c, int _id, void **_a)
{
_id = QDialog::qt_metacall(_c, _id, _a);
if (_id < 0)
return _id;
if (_c == QMetaObject::InvokeMetaMethod) {
switch (_id) {
case 0: checkData(); break;
case 1: checkFluidVelocity(); break;
default: ;
}
_id -= 2;
}
return _id;
}
QT_END_MOC_NAMESPACE
我查看了其他一些 moc_file 帖子,其中大多数都说要清理 Qt 并重建项目。我已经运行了一个项目清理并重建所有项目来尝试彻底修改此 moc 文件,但在消除错误方面没有取得任何成功。这看起来像是一个错误,但我在网上找不到任何有关它的信息,所以也许这是我不知道的事情。预先感谢您可以提供的任何帮助。
I'm a student programmer and I am using Qt to build some GUI applications for work and I have been running into moc issues over and over again. I was hoping for a solution to the current problem that I am having; however, if anyone more veteraned in Qt could shed some light on how to properly handle these files while making changes to your cpp file(s) I'd appreciate any help. In my most recent change (sorry I can't post what it did look like, because it's obviously been restructured) I was validating data by nesting a function inside of my checkData function. Because I would like a specific error to appear for each field that might be invalid I began to create a function for each QLineEdit. I realized that this would not work (or at least make more work) then instead of just providing sequenced checks of information. Below is the new code without the original nested function:
void InjectionDialog::checkData() {
bool validateFluidVelocity;
QString tempStrFluidVelocity;
tempStrFluidVelocity = ui->lineEditFluidVelocity->text();
double convertedFluidVelocity =
tempStrFluidVelocity.toDouble(&validateFluidVelocity);
if (validateFluidVelocity == false) {
QErrorMessage validateErrorFluidVelocityError;
validateErrorFluidVelocityError.
showMessage("Fluid velocity input is invalid");
validateErrorFluidVelocityError.exec();
}
else {
transData.lineEditFluidVelocity = convertedFluidVelocity;
}
bool validateFluidMassFlow;
QString tempStrFluidMassFlow;
tempStrFluidMassFlow = ui->lineEditFluidMassFlow->text();
double convertedFluidMassFlow =
tempStrFluidMassFlow.toDouble(&validateFluidMassFlow);
if (validateFluidMassFlow == false) {
QErrorMessage validateErrorFluidMassFlowError;
validateErrorFluidMassFlowError.
showMessage("Fluid mass flow input is invalid");
validateErrorFluidMassFlowError.exec();
}
else {
transData.lineEditFluidMassFlow = convertedFluidMassFlow;
}
bool validateParticleVelocity;
QString tempStrParticleVelocity;
tempStrParticleVelocity = ui->lineEditParticleVelocity->text();
double convertedParticleVelocity =
tempStrParticleVelocity.toDouble(&validateParticleVelocity);
if (validateParticleVelocity == false) {
QErrorMessage validateErrorParticleVelocity;
validateErrorParticleVelocity.
showMessage("Particle velocity input is invalid");
validateErrorParticleVelocity.exec();
}
else {
transData.lineEditParitcle_sic_Velocity = convertedParticleVelocity;
}
bool validateParticleMassFlow;
QString tempStrParticleMassFlow;
tempStrParticleMassFlow = ui->lineEditParticleMassFlow->text();
double convertedParticleMassFlow =
tempStrParticleMassFlow.toDouble(&validateParticleMassFlow);
if (validateParticleMassFlow == false) {
QErrorMessage validateErrorParticleMassFlow;
validateErrorParticleMassFlow.
showMessage("Particle mass flow input is invalid");
validateErrorParticleMassFlow.exec();
}
else {
transData.lineEditParticleMassFlow = convertedParticleMassFlow;
}
}
Initially I had InjectionDialog::checkFluidVelociy for the first check but decided against it pretty quickly. Now with the code restructured I receive the error:
In function 'InjectionDialog::checkFluidVelocity(QMetaObject::Call, int, void**)':
this error is referenced to moc_injectionDialog.o
unidentified reference to 'InjectionDialog::checkFluidVelocity()'
this error is referenced to moc_injectiondialog.cpp
In moc_injectiondialog I have the following I have the following listed:
/****************************************************************************
** Meta object code from reading C++ file 'injectiondialog.h'
**
** Created: Sat Jan 7 21:58:22 2012
** by: The Qt Meta Object Compiler version 62 (Qt 4.7.4)
**
** WARNING! All changes made in this file will be lost!
*****************************************************************************/
#include "../InjectionGUI/injectiondialog.h"
#if !defined(Q_MOC_OUTPUT_REVISION)
#error "The header file 'injectiondialog.h' doesn't include <QObject>."
#elif Q_MOC_OUTPUT_REVISION != 62
#error "This file was generated using the moc from 4.7.4. It"
#error "cannot be used with the include files from this version of Qt."
#error "(The moc has changed too much.)"
#endif
QT_BEGIN_MOC_NAMESPACE
static const uint qt_meta_data_InjectionDialog[] = {
// content:
5, // revision
0, // classname
0, 0, // classinfo
2, 14, // methods
0, 0, // properties
0, 0, // enums/sets
0, 0, // constructors
0, // flags
0, // signalCount
// slots: signature, parameters, type, tag, flags
17, 16, 16, 16, 0x08,
29, 16, 16, 16, 0x08,
0 // eod
};
static const char qt_meta_stringdata_InjectionDialog[] = {
"InjectionDialog\0\0checkData()\0"
"checkFluidVelocity()\0"
};
const QMetaObject InjectionDialog::staticMetaObject = {
{ &QDialog::staticMetaObject, qt_meta_stringdata_InjectionDialog,
qt_meta_data_InjectionDialog, 0 }
};
#ifdef Q_NO_DATA_RELOCATION
const QMetaObject &InjectionDialog::getStaticMetaObject() { return staticMetaObject; }
#endif //Q_NO_DATA_RELOCATION
const QMetaObject *InjectionDialog::metaObject() const
{
return QObject::d_ptr->metaObject ? QObject::d_ptr->metaObject : &staticMetaObject;
}
void *InjectionDialog::qt_metacast(const char *_clname)
{
if (!_clname) return 0;
if (!strcmp(_clname, qt_meta_stringdata_InjectionDialog))
return static_cast<void*>(const_cast< InjectionDialog*>(this));
return QDialog::qt_metacast(_clname);
}
int InjectionDialog::qt_metacall(QMetaObject::Call _c, int _id, void **_a)
{
_id = QDialog::qt_metacall(_c, _id, _a);
if (_id < 0)
return _id;
if (_c == QMetaObject::InvokeMetaMethod) {
switch (_id) {
case 0: checkData(); break;
case 1: checkFluidVelocity(); break;
default: ;
}
_id -= 2;
}
return _id;
}
QT_END_MOC_NAMESPACE
I have looked over some of the other moc_file posts and most of them say to have Qt clean and rebuild the project. I have ran a project clean up and rebuild all to try to overhaul this moc file but have not had any success in getting rid of the error. It seems like a bug but I couldn't find anything online about it so maybe it's something I don't know about. Thanks in advance for any help you can offer.
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每当我遇到 MOC 问题时,我都会构建 -> 清理全部,然后构建 -> 运行 qmake(Qt Creator IDE)。如果这不能解决我的问题,我会进入我的项目文件夹并删除 moc_* 文件和 Clean 未删除的任何其他垃圾 - 基本上只留下标头、源代码和资源。
Whenever I have MOC problems, I Build->Clean All and then Build->Run qmake (Qt Creator IDE). If that doesn't solve my problem, I go into my project folder and delete moc_* files and any other junk that Clean doesn't remove - basically leaving nothing but headers, source and resources.
转到引发错误的 moc 文件。在顶部,将有一个 include 语句,其中包含该窗口的头文件,不是 ui_.h,只是 .h
检查该文件中是否存在对导致错误的小部件的引用。
Go to you moc file which is throwing the error. At the top, there will be an include statement, which includes the header file for that window, NOT ui_.h, just .h
check in that file if there is a reference to the widget which is causing the error.
moc
文件神秘地包含对不存在方法的引用的问题可能是由遗留的 Q_PROPERTY 宏引起的...在下图中,
Q_PROPERTY
方法定义setBurgerIcon(QIcon)
已被删除。尽管如此,您仍会收到有关在moc
文件中引用此不存在的方法的错误。如果
setBurgerIcon(QIcon)
方法的签名发生更改,并且 Q_PROPERTY 未更新,您将收到其他错误,指示reinterpret_cast 的类型不兼容。q 属性
This issue of the
moc
file mysteriously containing a reference to a non-existent method can be caused by a left behind Q_PROPERTY macro...In the image below the
Q_PROPERTY
method definingsetBurgerIcon(QIcon)
has been deleted. Despite this you will continue to get errors about references to this non-existent method from within amoc
file.If the signature of the
setBurgerIcon(QIcon)
method is changed and the Q_PROPERTY is not updated you will get other failures indicated incompatible types for reinterpret_cast.q-properties