C++ QML ListView和分段错误
我正在使用QMLC++ QML ListView和分段错误,c++,qt,listview,qt4,qml,C++,Qt,Listview,Qt4,Qml,我正在使用QMLListView和SectionScroller&QAbstractListModel。我注意到,当我正常滚动时(不使用SectionScroller),我在memcpy(从未明确调用)中出现了分段错误 你知道为什么会这样吗 我试着复制它,现在分割错误是 0x402f9c3a英寸??()来自/usr/lib/libQtScript.so.4 0x402f9c3a:ldrh r1[r7,r3] 调试符号在那里,但没有转储有价值的信息。另一次,断层被破坏了 QBasicAtomicI
ListView
和SectionScroller
&QAbstractListModel
。我注意到,当我正常滚动时(不使用SectionScroller
),我在memcpy
(从未明确调用)中出现了分段错误
你知道为什么会这样吗
我试着复制它,现在分割错误是
0x402f9c3a英寸??()来自/usr/lib/libQtScript.so.40x402f9c3a:ldrh r1[r7,r3] 调试符号在那里,但没有转储有价值的信息。另一次,断层被破坏了 QBasicAtomicInt::ref中的0x0000cab8(此=0x0) at/usr/include/QtCore/qatomic_armv6.h:119 奇怪的是,AFAIK N900的处理器是armv7/edit:在N950上,它使用相同的源代码,而在Qt中,源代码仅用于ARM
qatomic_ARM.h
和qatomic_armv6.h
,所以应该可以
ListView{
id: irrview
width: parent.width
model: irregulars
anchors.top: caption.bottom
anchors.bottom: parent.bottom
spacing: 5
clip: true
section.criteria: ViewSection.FirstCharacter
section.property: "form0"
delegate: Rectangle{
id: del
property int fontSize: 20
height: 60
width: parent.width
color: "#E0E1E2"
Row{
height: parent.height
width: parent.width - 10
anchors.horizontalCenter: parent.horizontalCenter
property real columnWidth: (width - 10) / 3
property int rad: 10
spacing: 5
Rectangle{
height: parent.height
width: parent.columnWidth
radius: parent.rad
color: "lightsteelblue"
Text{
anchors.centerIn: parent
text: form0
font.pointSize: del.fontSize
}
}
Rectangle{
height: parent.height
width: parent.columnWidth
radius: parent.rad
color: "lightsteelblue"
Text{
anchors.centerIn: parent
text: form1
font.pointSize: del.fontSize
}
}
Rectangle{
height: parent.height
width: parent.columnWidth
radius: parent.rad
color: "lightsteelblue"
Text{
anchors.centerIn: parent
text: form2
font.pointSize: del.fontSize
}
}
}
}
}
模型是:
#ifndef IRREGULARLISTWRAPPER_H
#define IRREGULARLISTWRAPPER_H
#include <QObject>
#include <QList>
#include <QAbstractListModel>
#include <QMap>
#include "IrregularVerb.h"
#include "AbstractIrregularList.h"
class IrregularListWrapper : public QAbstractListModel
{
Q_OBJECT
Q_PROPERTY(QString langName READ getLangName NOTIFY langChanged)
Q_PROPERTY(int count READ rowCount NOTIFY langChanged)
Q_ENUMS(Language)
public:
Q_INVOKABLE int rowCount(const QModelIndex& = QModelIndex()) const { return db->count(); }
Q_INVOKABLE QObject* get(int index) const {return db->at(index);}
QVariant data(const QModelIndex &index, int role) const;
enum Language
{
English = 0,
German = 1
};
enum IrregularVerbRoles
{
Form0Role = Qt::UserRole + 1,
Form1Role,
Form2Role
};
IrregularListWrapper();
// ~IrregularListWrapper() { delete db; }
// QList<QObject*> getdb() const { return *db; }
QString getLangName() const { return langName; }
Q_INVOKABLE void changeLang(Language l) { beginResetModel(); db = 0; /*QList<IrregularVerb*>();*/ setLang(l); endResetModel(); }
static QMap<Language, QString> plugins;
signals:
void langChanged();
protected:
void setLang(Language);
//QList<IrregularVerb*> db;
QString langName;
AbstractIrregularList * db;
};
#endif // IRREGULARLISTWRAPPER_H
QMap<IrregularListWrapper::Language, QString> IrregularListWrapper::plugins;
IrregularListWrapper::IrregularListWrapper()
{
QHash<int, QByteArray> roles;
roles[Form0Role] = "form0";
roles[Form1Role] = "form1";
roles[Form2Role] = "form2";
const QString pluginPath = "/opt/MeeIrregulars/share/lib%1.so";
plugins[English] = pluginPath.arg("english");
plugins[German] = pluginPath.arg("german");
setRoleNames(roles);
setLang(German);
}
QVariant IrregularListWrapper::data(const QModelIndex &index, int role) const
{
if (!index.isValid()) return QVariant();
const IrregularVerb* verb = db->at(index.row());
switch (role)
{
case Form0Role:
return verb->getForm0();
break;
case Form1Role:
return verb->getForm1();
break;
case Form2Role:
return verb->getForm2();
break;
}
return QVariant();
}
void IrregularListWrapper::setLang(Language l)
{
QPluginLoader loader(plugins[l]);
db = qobject_cast<AbstractIrregularList*>(loader.instance());
if (db == 0) db = new AbstractIrregularList;
switch (l)
{
case English:
langName = "English";
break;
case German:
langName = "German";
break;
}
emit langChanged();
}
class IrregularVerb : public QObject
{
Q_OBJECT
Q_PROPERTY(QString form0 READ getForm0 NOTIFY formChanged)
Q_PROPERTY(QString form1 READ getForm1 NOTIFY formChanged)
Q_PROPERTY(QString form2 READ getForm2 NOTIFY formChanged)
public:
QString forms[3];
QString getForm0() const { return forms[0]; }
QString getForm1() const { return forms[1]; }
QString getForm2() const { return forms[2]; }
IrregularVerb(QString a, QString b, QString c) { forms[0] = a; forms[1] = b; forms[2] = c; }
signals:
void formChanged();
};
#如果不规则
#定义不规则列表
#包括
#包括
#包括
#包括
#包括“动词.h”
#包括“AbstractList.h”
类ListWrapper:公共QabStretchListModel
{
Q_对象
Q_属性(QString langName读取getLangName通知langChanged)
Q_属性(整数计数读取行计数已更改)
Q_枚举(语言)
公众:
Q_可调用int rowCount(const QModelIndex&=QModelIndex())const{return db->count();}
Q_可调用QObject*get(int index)const{return db->at(index);}
QVariant数据(常量QModelIndex&index,int角色)常量;
枚举语言
{
英语=0,
德语=1
};
枚举角色
{
Form0Role=Qt::UserRole+1,
Form1Role,
Form2Role
};
不规则ListWrapper();
//~ListWrapper(){delete db;}
//QList getdb()常量{return*db;}
QString getLangName()常量{return langName;}
Q_可调用的void changeLang(语言l){beginResetModel();db=0;/*QList();*/setLang(语言l);endResetModel();}
静态QMap插件;
信号:
void langChanged();
受保护的:
void setLang(语言);
//QList数据库;
QString-langName;
抽象列表*db;
};
#endif//u H
QMap ListWrapper::插件;
unregularlistwrapper::unregularlistwrapper()
{
QHash角色;
角色[Form0Role]=“form0”;
角色[Form1Role]=“form1”;
角色[Form2Role]=“form2”;
const QString pluginPath=“/opt/meeinrulles/share/lib%1.so”;
plugins[英语]=pluginPath.arg(“英语”);
plugins[德语]=pluginPath.arg(“德语”);
setRoleNames(角色);
塞特朗(德语);
}
QListWrapper::数据(常量QModelIndex&index,int角色)常量
{
如果(!index.isValid())返回QVariant();
常量动词*动词=db->at(index.row());
交换机(角色)
{
案例表单0角色:
返回动词->getForm0();
打破
案例表单1角色:
返回动词->getForm1();
打破
案例表单2角色:
返回动词->getForm2();
打破
}
返回QVariant();
}
无效ListWrapper::setLang(语言l)
{
QPluginLoader(插件[l]);
db=qobject_cast(loader.instance());
如果(db==0)db=new抽象列表;
开关(l)
{
案例英语:
langName=“英语”;
打破
案例德语:
langName=“德语”;
打破
}
发出改变的信号();
}
类:公共QObject
{
Q_对象
Q_属性(QString form0 READ getForm0 NOTIFY formChanged)
Q_属性(QString form1 READ getForm1 NOTIFY formChanged)
Q_属性(QString form2 READ getForm2 NOTIFY formChanged)
公众:
QString形式[3];
QString getForm0()常量{返回表单[0];}
QString getForm1()常量{return forms[1];}
QString getForm2()常量{return forms[2];}
不规则动词(qstringa,qstringb,qstringc){forms[0]=a;forms[1]=b;forms[2]=c;}
信号:
void formChanged();
};
回溯:
#0 QBasicAtomicInt::ref(this=0x18)#1个QString(此=0xbe88d2a0,其他=…)
#2:getForm2(this=0x9e6de8)
#3.2.3.2.3.2.2.3.2.2.3.2.2.2.2.2.3.2.2.2.2.2.2.2.3.2.2.2.3.2.2.2.2.2.3.2.2.2.2.2.2.2.2.3.2.2.2
谢谢。这是所有权的问题。由
get
返回的元素归JS所有并自动销毁。有关更多信息,请参阅。您仅在ARM或所有平台上获得此信息?在x86_64上,它也会崩溃。您是否设法解决了此问题?@ispascraudiu请参阅我的答案。