Question

嗨:)我正在尝试为自制的RPG创建一个角色表生成器:)我在调试一个奇怪的段错误时遇到了一些麻烦。

究竟发生了什么：

我在_c CCharacter对象中初始化_skills，然后第一次调用updateSkillBoxes（）。它完美无缺。
我可以在我的_skills中添加其他CUSkill，再次调用updateSkillBoxes（），添加它们没有问题
如果我使用QComboBox名称更改一个技能的名称，它会调用onSkillChanged（），结束该功能而不会崩溃（我看到“onSkillChanged（）已完成”qDebug（）消息），然后在app.exec中崩溃（）在我的main.cpp

我尝试了什么：

直接调用我的connect上的updateSkillBoxes（）（稍微更改了代码以更新里面的数据）：同样的问题。
将连接置于CSkillInput初始化或onSkillChanged中，同样的错误
删除updateSkillBoxes（）中的connect，并将onSkillChanged（）连接到UI中的按钮。它工作得很好，所以功能似乎有效（连接部分除外）

以下是代码：

void CGenerator::updateSkillBoxes()
{
    qDebug() << "updateSkillBoxes() started";
    //First we remove
    int skillNum=_skillI.size();
    for(int i=0;i<skillNum;i++)
    {
        delete(_skillI.takeAt(0));
        delete(_skillInputLayout.takeAt(0));
        delete(_skillInputBox.takeAt(0));
    }

    //Clean skillGrid
    QLayoutItem *child;
    while ((child = _skillGrid->takeAt(0)) != 0)
    {
        delete child->widget();
        delete child;
    }
    delete _skillGrid;

    _skillGrid = new QGridLayout;
    for(int i=0;i<_c->getSkill().size();i++)
    {
        CUSkill *skill = _c->getSkill()[i];
        QPointer<QGridLayout> tmpLayout = new QGridLayout;
        QPointer<QGroupBox> tmpBox = new QGroupBox;
        //Recreate new input
        QPointer<CSkillInput> tmpInput = new CSkillInput(d->getSkillNameList(), d->getSkillIdList());
        tmpInput->createPerkInput(d->getUsablePerk(skill->getParam("id"), skill->getParam("level").toInt()),
                                  _c->getPerkNumberForSkill(i));
        tmpInput->updateInput(skill);
        _skillI.append(tmpInput);
        //Add everything to the gridlayout
        tmpLayout->addWidget(new QLabel("Nom"), 0, 0);
        tmpLayout->addWidget(new QLabel("Niveau"), 0, 1);
        tmpLayout->addWidget(new QLabel("Spécial"), 0, 2);
        tmpLayout->addWidget(new QLabel("Vitesse"), 0, 3);
        tmpLayout->addWidget(new QLabel("Type"), 0, 4);
        tmpLayout->addWidget(_skillI[i]->level, 1, 1);
        tmpLayout->addWidget(_skillI[i]->special, 1, 2);
        tmpLayout->addWidget(_skillI[i]->speed, 1, 3);
        tmpLayout->addWidget(_skillI[i]->type, 1, 4);
        tmpLayout->addWidget(_skillI[i]->name,1, 0);
        //Now we add the perks (they have been filled with createPerkInput() earlier
        for(int j=0;j<_skillI[i]->perkList.size();j++)
        {
            tmpLayout->addWidget(_skillI[i]->perkList[j], 2+j, 0);
            tmpLayout->addWidget(_skillI[i]->perkLevel[j], 2+j, 1);
            tmpLayout->addWidget(_skillI[i]->perkDesc[j], 2+j, 2, 1, -1);
        }
        //I'm not actually sure i need to access those later, but just to be sure i'll put them somewhere
        _skillInputLayout.append(tmpLayout);
        _skillInputBox.append(tmpBox);
        _skillInputBox[i]->setLayout(_skillInputLayout[i]);
        if(i%2 == 0)//We want to put 2 skills by line (cuz it's fancier), so ... different case
        {
            _skillGrid->addWidget(_skillInputBox[i], i/2, 0, 1, 1, Qt::AlignTop);
        }
        else
        {
            _skillGrid->addWidget(_skillInputBox[i], (i-1)/2, 1, 1 , 1, Qt::AlignTop);
        }
        connect(_skillI[i]->name, SIGNAL(currentIndexChanged(int)), this, SLOT(onSkillChanged()));
    }
    _skillBox->setLayout(_skillGrid);
    qDebug() << "updateSkillBoxes() finished";
}

void CGenerator::onSkillChanged()
{
    qDebug() << "onSkillChanged() started";
    //We need to find which skill has been updated !
    for(int i=0;i<_skillI.size();i++)
    {
        QString newId = _skillI[i]->name->itemData(_skillI[i]->name->currentIndex()).toString();
        if(newId != _c->getSkill()[i]->getParam("id"))
        {
            _c->updateSkill(i, newId);
            CSkillInput *input;
            input = _skillI[i];
            _c->setSkillParam(i, "level", QString::number(input->level->value()));
            _c->setSkillParam(i, "special",  input->special->itemData(input->special->currentIndex()).toString());
            _c->updatePerkNumber(i, _c->getPerkNumberForSkill(i));
            updateSkillBoxes();
        }
    }
    qDebug() << "onSkillChanged() finished";
}

CSkillInput代码：

CSkillInput::CSkillInput(QStringList skillName, QStringList skillId)
{
    name = new QComboBox;
    for(int i=0;i<skillName.size();i++)
    {
        name->addItem(skillName[i], skillId[i]);
    }
    speed = new QComboBox;
    speed->addItem("Rapide","f");
    speed->addItem("Moyen", "m");
    speed->addItem("Lent", "s");
    speed->setEnabled(false);
    type = new QComboBox;
    type->addItem("Martial", "w");
    type->addItem("Magique", "m");
    type->addItem("Divers", "d");
    type->setEnabled(false);
    special = new QComboBox;
    special->addItem("Rien", "n");
    special->addItem("Talent", "t");
    special->addItem("Don", "g");
    level = new QSpinBox;
    level->setMaximum(10);
}

CSkillInput::~CSkillInput()
{
    this->name->disconnect();
}

void CSkillInput::createPerkInput(QList<CPerk *> perks, qint32 perkNumber)
{
    //First we need to make a list of the perks name
    for(int i=0;i<perkNumber;i++)
    {
        //Kinda ugly but it's because we need to generate differents object
        QComboBox *tmpList = new QComboBox;
        for(int i=0;i<perks.size();i++)
        {
            tmpList->addItem(perks[i]->getParamStr("name"), perks[i]->getParamStr("id"));
        }
        QSpinBox *tmpLevel = new QSpinBox;
        QLineEdit *tmpDesc = new QLineEdit;
        tmpLevel->setValue(perks[0]->getParamInt("level"));
        tmpLevel->setReadOnly(true);
        tmpDesc->setText(perks[0]->getParamStr("desc"));
        tmpDesc->setToolTip(perks[0]->getParamStr("desc"));
        perkList << tmpList;
        perkLevel << tmpLevel;
        perkDesc << tmpDesc;
    }
}

void CSkillInput::updateInput(CUSkill *skill)
{
    if(skill->getParam("id") != name->itemData(name->currentIndex()))
    {
        name->setCurrentIndex(name->findData(skill->getParam("id")));
    }
    level->setValue(skill->getParam("level").toInt());
    speed->setCurrentIndex(speed->findData(skill->getParam("speed")));
    special->setCurrentIndex(special->findData(skill->getParam("special")));
    type->setCurrentIndex(type->findData(skill->getParam("type")));
}

标题（为了清晰起见，删除了CGenerator中的一些不相关的内容）

class CSkillInput : public QObject
{
    Q_OBJECT
public:
    CSkillInput(QStringList skillName, QStringList skillId);
    ~CSkillInput();

    void createPerkInput(QList<CPerk *> perks, qint32 perkNumber);
    void updateInput(CUSkill *skill);

    QPointer<QComboBox> name;
    QPointer<QComboBox> speed;
    QPointer<QComboBox> type;
    QPointer<QComboBox> special;
    QPointer<QSpinBox> level;
    QList<QPointer<QComboBox > > perkList;
    QList<QPointer<QSpinBox > > perkLevel;
    QList<QPointer<QLineEdit > > perkDesc;
};

class CGenerator : public QWidget
{
    Q_OBJECT
public:
    CGenerator(CData *data);
    CData *d;

private:
    CCharacter *_c;
    QGridLayout *_skillGrid;
    QGroupBox *_skillBox;
    QList<QPointer<QGridLayout> > _skillInputLayout;
    QList<QPointer<QGroupBox> > _skillInputBox;
    QList<QPointer<CSkillInput> > _skillI;
private slots:
    void onSkillChanged();
    void updateSkillBoxes();
};

快速图解释我的用户界面：http://i.stack.imgur.com/SDHE2.png

最后，我在segfault上的gdb堆栈：

(gdb) bt
#0  QComboBoxPrivate::itemText (this=this@entry=0xbf2540, index=...) at widgets/qcombobox.cpp:1287
#1  0x00007ffff769e58f in QComboBoxPrivate::_q_emitCurrentIndexChanged (this=this@entry=0xbf2540, index=...)
    at widgets/qcombobox.cpp:1279
#2  0x00007ffff769e8eb in QComboBoxPrivate::setCurrentIndex (this=this@entry=0xbf2540, mi=...) at widgets/qcombobox.cpp:2049
#3  0x00007ffff769eb4f in QComboBox::setCurrentIndex (this=this@entry=0xca4450, index=index@entry=2) at widgets/qcombobox.cpp:2025
#4  0x00007ffff76a2f06 in QComboBox::wheelEvent (this=0xca4450, e=0x7fffffffd7e0) at widgets/qcombobox.cpp:3096
#5  0x00007ffff7306748 in QWidget::event (this=0xca4450, event=0x7fffffffd7e0) at kernel/qwidget.cpp:8775
#6  0x00007ffff72b348c in QApplicationPrivate::notify_helper (this=this@entry=0x659590, receiver=receiver@entry=0xca4450, 
    e=e@entry=0x7fffffffd7e0) at kernel/qapplication.cpp:4570
#7  0x00007ffff72bb4fb in QApplication::notify (this=<optimized out>, receiver=0xca4450, e=0x7fffffffd7e0)
    at kernel/qapplication.cpp:4168
#8  0x00007ffff6d8371d in QCoreApplication::notifyInternal (this=0x7fffffffe130, receiver=0xca4450, event=0x7fffffffd7e0)
    at kernel/qcoreapplication.cpp:955
#9  0x00007ffff732cb49 in sendSpontaneousEvent (event=<optimized out>, receiver=<optimized out>)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#10 QETWidget::translateWheelEvent (this=0x7fffffffd7e0, global_x=12526912, global_y=12486272, delta=12750704, buttons=..., 
    modifiers=..., orient=Qt::Vertical) at kernel/qapplication_x11.cpp:4578
#11 0x00007ffff73309c8 in QETWidget::translateMouseEvent (this=this@entry=0x7fffffffe0b0, event=event@entry=0x7fffffffdc70)
    at kernel/qapplication_x11.cpp:4355
#12 0x00007ffff732ee2c in QApplication::x11ProcessEvent (this=0x7fffffffe130, event=event@entry=0x7fffffffdc70)
    at kernel/qapplication_x11.cpp:3663
#13 0x00007ffff7357ed2 in x11EventSourceDispatch (s=0x65c320, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#14 0x00007ffff56f8c5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#15 0x00007ffff56f8f48 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#16 0x00007ffff56f8ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#17 0x00007ffff6db2d1d in QEventDispatcherGlib::processEvents (this=0x65add0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#18 0x00007ffff7357f96 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...)
    at kernel/qguieventdispatcher_glib.cpp:204
#19 0x00007ffff6d82271 in QEventLoop::processEvents (this=this@entry=0x7fffffffe050, flags=...) at kernel/qeventloop.cpp:149
---Type <return> to continue, or q <return> to quit---
#20 0x00007ffff6d825d5 in QEventLoop::exec (this=this@entry=0x7fffffffe050, flags=...) at kernel/qeventloop.cpp:204
#21 0x00007ffff6d88059 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1227
#22 0x0000000000408ad5 in main (argc=1, argv=0x7fffffffe238) at ../../../../code/kustom/kustom-sheet-creator/main.cpp:34

无法调试segfault，涉及connect（）

0 个答案: