add files

Qtsqlite.pro

+#-------------------------------------------------
+#
+# Project created by QtCreator 2020-07-06T15:32:42
+#
+#-------------------------------------------------
+
+QT       += core gui sql
+
+greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
+
+TARGET = Qtsqlite
+TEMPLATE = app
+
+
+SOURCES += main.cpp\
+        mainwindow.cpp \
+    regist.cpp \
+    userwindow.cpp \
+    showtable.cpp
+
+HEADERS  += mainwindow.h \
+    regist.h \
+    userwindow.h \
+    showtable.h
+
+FORMS    += mainwindow.ui \
+    regist.ui \
+    userwindow.ui \
+    showtable.ui

debug/moc_mainwindow.cpp

+/****************************************************************************
+** Meta object code from reading C++ file 'mainwindow.h'
+**
+** Created by: The Qt Meta Object Compiler version 67 (Qt 5.6.3)
+**
+** WARNING! All changes made in this file will be lost!
+*****************************************************************************/
+
+#include "../mainwindow.h"
+#include <QtCore/qbytearray.h>
+#include <QtCore/qmetatype.h>
+#if !defined(Q_MOC_OUTPUT_REVISION)
+#error "The header file 'mainwindow.h' doesn't include <QObject>."
+#elif Q_MOC_OUTPUT_REVISION != 67
+#error "This file was generated using the moc from 5.6.3. 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
+struct qt_meta_stringdata_MainWindow_t {
+    QByteArrayData data[7];
+    char stringdata0[88];
+};
+#define QT_MOC_LITERAL(idx, ofs, len) \
+    Q_STATIC_BYTE_ARRAY_DATA_HEADER_INITIALIZER_WITH_OFFSET(len, \
+    qptrdiff(offsetof(qt_meta_stringdata_MainWindow_t, stringdata0) + ofs \
+        - idx * sizeof(QByteArrayData)) \
+    )
+static const qt_meta_stringdata_MainWindow_t qt_meta_stringdata_MainWindow = {
+    {
+QT_MOC_LITERAL(0, 0, 10), // "MainWindow"
+QT_MOC_LITERAL(1, 11, 8), // "sendinfo"
+QT_MOC_LITERAL(2, 20, 0), // ""
+QT_MOC_LITERAL(3, 21, 12), // "QSqlDatabase"
+QT_MOC_LITERAL(4, 34, 7), // "sendata"
+QT_MOC_LITERAL(5, 42, 23), // "on_pushButton_2_clicked"
+QT_MOC_LITERAL(6, 66, 21) // "on_pushButton_clicked"
+
+    },
+    "MainWindow\0sendinfo\0\0QSqlDatabase\0"
+    "sendata\0on_pushButton_2_clicked\0"
+    "on_pushButton_clicked"
+};
+#undef QT_MOC_LITERAL
+
+static const uint qt_meta_data_MainWindow[] = {
+
+ // content:
+       7,       // revision
+       0,       // classname
+       0,    0, // classinfo
+       4,   14, // methods
+       0,    0, // properties
+       0,    0, // enums/sets
+       0,    0, // constructors
+       0,       // flags
+       2,       // signalCount
+
+ // signals: name, argc, parameters, tag, flags
+       1,    2,   34,    2, 0x06 /* Public */,
+       4,    2,   39,    2, 0x06 /* Public */,
+
+ // slots: name, argc, parameters, tag, flags
+       5,    0,   44,    2, 0x08 /* Private */,
+       6,    0,   45,    2, 0x08 /* Private */,
+
+ // signals: parameters
+    QMetaType::Void, 0x80000000 | 3, QMetaType::QString,    2,    2,
+    QMetaType::Void, 0x80000000 | 3, QMetaType::QString,    2,    2,
+
+ // slots: parameters
+    QMetaType::Void,
+    QMetaType::Void,
+
+       0        // eod
+};
+
+void MainWindow::qt_static_metacall(QObject *_o, QMetaObject::Call _c, int _id, void **_a)
+{
+    if (_c == QMetaObject::InvokeMetaMethod) {
+        MainWindow *_t = static_cast<MainWindow *>(_o);
+        Q_UNUSED(_t)
+        switch (_id) {
+        case 0: _t->sendinfo((*reinterpret_cast< QSqlDatabase(*)>(_a[1])),(*reinterpret_cast< QString(*)>(_a[2]))); break;
+        case 1: _t->sendata((*reinterpret_cast< QSqlDatabase(*)>(_a[1])),(*reinterpret_cast< QString(*)>(_a[2]))); break;
+        case 2: _t->on_pushButton_2_clicked(); break;
+        case 3: _t->on_pushButton_clicked(); break;
+        default: ;
+        }
+    } else if (_c == QMetaObject::IndexOfMethod) {
+        int *result = reinterpret_cast<int *>(_a[0]);
+        void **func = reinterpret_cast<void **>(_a[1]);
+        {
+            typedef void (MainWindow::*_t)(QSqlDatabase , QString );
+            if (*reinterpret_cast<_t *>(func) == static_cast<_t>(&MainWindow::sendinfo)) {
+                *result = 0;
+                return;
+            }
+        }
+        {
+            typedef void (MainWindow::*_t)(QSqlDatabase , QString );
+            if (*reinterpret_cast<_t *>(func) == static_cast<_t>(&MainWindow::sendata)) {
+                *result = 1;
+                return;
+            }
+        }
+    }
+}
+
+const QMetaObject MainWindow::staticMetaObject = {
+    { &QMainWindow::staticMetaObject, qt_meta_stringdata_MainWindow.data,
+      qt_meta_data_MainWindow,  qt_static_metacall, Q_NULLPTR, Q_NULLPTR}
+};
+
+
+const QMetaObject *MainWindow::metaObject() const
+{
+    return QObject::d_ptr->metaObject ? QObject::d_ptr->dynamicMetaObject() : &staticMetaObject;
+}
+
+void *MainWindow::qt_metacast(const char *_clname)
+{
+    if (!_clname) return Q_NULLPTR;
+    if (!strcmp(_clname, qt_meta_stringdata_MainWindow.stringdata0))
+        return static_cast<void*>(const_cast< MainWindow*>(this));
+    return QMainWindow::qt_metacast(_clname);
+}
+
+int MainWindow::qt_metacall(QMetaObject::Call _c, int _id, void **_a)
+{
+    _id = QMainWindow::qt_metacall(_c, _id, _a);
+    if (_id < 0)
+        return _id;
+    if (_c == QMetaObject::InvokeMetaMethod) {
+        if (_id < 4)
+            qt_static_metacall(this, _c, _id, _a);
+        _id -= 4;
+    } else if (_c == QMetaObject::RegisterMethodArgumentMetaType) {
+        if (_id < 4)
+            *reinterpret_cast<int*>(_a[0]) = -1;
+        _id -= 4;
+    }
+    return _id;
+}
+
+// SIGNAL 0
+void MainWindow::sendinfo(QSqlDatabase _t1, QString _t2)
+{
+    void *_a[] = { Q_NULLPTR, const_cast<void*>(reinterpret_cast<const void*>(&_t1)), const_cast<void*>(reinterpret_cast<const void*>(&_t2)) };
+    QMetaObject::activate(this, &staticMetaObject, 0, _a);
+}
+
+// SIGNAL 1
+void MainWindow::sendata(QSqlDatabase _t1, QString _t2)
+{
+    void *_a[] = { Q_NULLPTR, const_cast<void*>(reinterpret_cast<const void*>(&_t1)), const_cast<void*>(reinterpret_cast<const void*>(&_t2)) };
+    QMetaObject::activate(this, &staticMetaObject, 1, _a);
+}
+QT_END_MOC_NAMESPACE

debug/moc_regist.cpp

+/****************************************************************************
+** Meta object code from reading C++ file 'regist.h'
+**
+** Created by: The Qt Meta Object Compiler version 67 (Qt 5.6.3)
+**
+** WARNING! All changes made in this file will be lost!
+*****************************************************************************/
+
+#include "../regist.h"
+#include <QtCore/qbytearray.h>
+#include <QtCore/qmetatype.h>
+#if !defined(Q_MOC_OUTPUT_REVISION)
+#error "The header file 'regist.h' doesn't include <QObject>."
+#elif Q_MOC_OUTPUT_REVISION != 67
+#error "This file was generated using the moc from 5.6.3. 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
+struct qt_meta_stringdata_Regist_t {
+    QByteArrayData data[6];
+    char stringdata0[69];
+};
+#define QT_MOC_LITERAL(idx, ofs, len) \
+    Q_STATIC_BYTE_ARRAY_DATA_HEADER_INITIALIZER_WITH_OFFSET(len, \
+    qptrdiff(offsetof(qt_meta_stringdata_Regist_t, stringdata0) + ofs \
+        - idx * sizeof(QByteArrayData)) \
+    )
+static const qt_meta_stringdata_Regist_t qt_meta_stringdata_Regist = {
+    {
+QT_MOC_LITERAL(0, 0, 6), // "Regist"
+QT_MOC_LITERAL(1, 7, 7), // "getdata"
+QT_MOC_LITERAL(2, 15, 0), // ""
+QT_MOC_LITERAL(3, 16, 12), // "QSqlDatabase"
+QT_MOC_LITERAL(4, 29, 21), // "on_pushButton_clicked"
+QT_MOC_LITERAL(5, 51, 17) // "on_goback_clicked"
+
+    },
+    "Regist\0getdata\0\0QSqlDatabase\0"
+    "on_pushButton_clicked\0on_goback_clicked"
+};
+#undef QT_MOC_LITERAL
+
+static const uint qt_meta_data_Regist[] = {
+
+ // content:
+       7,       // revision
+       0,       // classname
+       0,    0, // classinfo
+       3,   14, // methods
+       0,    0, // properties
+       0,    0, // enums/sets
+       0,    0, // constructors
+       0,       // flags
+       0,       // signalCount
+
+ // slots: name, argc, parameters, tag, flags
+       1,    2,   29,    2, 0x0a /* Public */,
+       4,    0,   34,    2, 0x08 /* Private */,
+       5,    0,   35,    2, 0x08 /* Private */,
+
+ // slots: parameters
+    QMetaType::Void, 0x80000000 | 3, QMetaType::QString,    2,    2,
+    QMetaType::Void,
+    QMetaType::Void,
+
+       0        // eod
+};
+
+void Regist::qt_static_metacall(QObject *_o, QMetaObject::Call _c, int _id, void **_a)
+{
+    if (_c == QMetaObject::InvokeMetaMethod) {
+        Regist *_t = static_cast<Regist *>(_o);
+        Q_UNUSED(_t)
+        switch (_id) {
+        case 0: _t->getdata((*reinterpret_cast< QSqlDatabase(*)>(_a[1])),(*reinterpret_cast< QString(*)>(_a[2]))); break;
+        case 1: _t->on_pushButton_clicked(); break;
+        case 2: _t->on_goback_clicked(); break;
+        default: ;
+        }
+    }
+}
+
+const QMetaObject Regist::staticMetaObject = {
+    { &QMainWindow::staticMetaObject, qt_meta_stringdata_Regist.data,
+      qt_meta_data_Regist,  qt_static_metacall, Q_NULLPTR, Q_NULLPTR}
+};
+
+
+const QMetaObject *Regist::metaObject() const
+{
+    return QObject::d_ptr->metaObject ? QObject::d_ptr->dynamicMetaObject() : &staticMetaObject;
+}
+
+void *Regist::qt_metacast(const char *_clname)
+{
+    if (!_clname) return Q_NULLPTR;
+    if (!strcmp(_clname, qt_meta_stringdata_Regist.stringdata0))
+        return static_cast<void*>(const_cast< Regist*>(this));
+    return QMainWindow::qt_metacast(_clname);
+}
+
+int Regist::qt_metacall(QMetaObject::Call _c, int _id, void **_a)
+{
+    _id = QMainWindow::qt_metacall(_c, _id, _a);
+    if (_id < 0)
+        return _id;
+    if (_c == QMetaObject::InvokeMetaMethod) {
+        if (_id < 3)
+            qt_static_metacall(this, _c, _id, _a);
+        _id -= 3;
+    } else if (_c == QMetaObject::RegisterMethodArgumentMetaType) {
+        if (_id < 3)
+            *reinterpret_cast<int*>(_a[0]) = -1;
+        _id -= 3;
+    }
+    return _id;
+}
+QT_END_MOC_NAMESPACE

debug/moc_showtable.cpp

+/****************************************************************************
+** Meta object code from reading C++ file 'showtable.h'
+**
+** Created by: The Qt Meta Object Compiler version 67 (Qt 5.6.3)
+**
+** WARNING! All changes made in this file will be lost!
+*****************************************************************************/
+
+#include "../showtable.h"
+#include <QtCore/qbytearray.h>
+#include <QtCore/qmetatype.h>
+#if !defined(Q_MOC_OUTPUT_REVISION)
+#error "The header file 'showtable.h' doesn't include <QObject>."
+#elif Q_MOC_OUTPUT_REVISION != 67
+#error "This file was generated using the moc from 5.6.3. 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
+struct qt_meta_stringdata_ShowTable_t {
+    QByteArrayData data[5];
+    char stringdata0[48];
+};
+#define QT_MOC_LITERAL(idx, ofs, len) \
+    Q_STATIC_BYTE_ARRAY_DATA_HEADER_INITIALIZER_WITH_OFFSET(len, \
+    qptrdiff(offsetof(qt_meta_stringdata_ShowTable_t, stringdata0) + ofs \
+        - idx * sizeof(QByteArrayData)) \
+    )
+static const qt_meta_stringdata_ShowTable_t qt_meta_stringdata_ShowTable = {
+    {
+QT_MOC_LITERAL(0, 0, 9), // "ShowTable"
+QT_MOC_LITERAL(1, 10, 6), // "dowork"
+QT_MOC_LITERAL(2, 17, 0), // ""
+QT_MOC_LITERAL(3, 18, 12), // "QSqlDatabase"
+QT_MOC_LITERAL(4, 31, 16) // "on_close_clicked"
+
+    },
+    "ShowTable\0dowork\0\0QSqlDatabase\0"
+    "on_close_clicked"
+};
+#undef QT_MOC_LITERAL
+
+static const uint qt_meta_data_ShowTable[] = {
+
+ // content:
+       7,       // revision
+       0,       // classname
+       0,    0, // classinfo
+       2,   14, // methods
+       0,    0, // properties
+       0,    0, // enums/sets
+       0,    0, // constructors
+       0,       // flags
+       0,       // signalCount
+
+ // slots: name, argc, parameters, tag, flags
+       1,    2,   24,    2, 0x0a /* Public */,
+       4,    0,   29,    2, 0x08 /* Private */,
+
+ // slots: parameters
+    QMetaType::Void, 0x80000000 | 3, QMetaType::QString,    2,    2,
+    QMetaType::Void,
+
+       0        // eod
+};
+
+void ShowTable::qt_static_metacall(QObject *_o, QMetaObject::Call _c, int _id, void **_a)
+{
+    if (_c == QMetaObject::InvokeMetaMethod) {
+        ShowTable *_t = static_cast<ShowTable *>(_o);
+        Q_UNUSED(_t)
+        switch (_id) {
+        case 0: _t->dowork((*reinterpret_cast< QSqlDatabase(*)>(_a[1])),(*reinterpret_cast< QString(*)>(_a[2]))); break;
+        case 1: _t->on_close_clicked(); break;
+        default: ;
+        }
+    }
+}
+
+const QMetaObject ShowTable::staticMetaObject = {
+    { &QMainWindow::staticMetaObject, qt_meta_stringdata_ShowTable.data,
+      qt_meta_data_ShowTable,  qt_static_metacall, Q_NULLPTR, Q_NULLPTR}
+};
+
+
+const QMetaObject *ShowTable::metaObject() const
+{
+    return QObject::d_ptr->metaObject ? QObject::d_ptr->dynamicMetaObject() : &staticMetaObject;
+}
+
+void *ShowTable::qt_metacast(const char *_clname)
+{
+    if (!_clname) return Q_NULLPTR;
+    if (!strcmp(_clname, qt_meta_stringdata_ShowTable.stringdata0))
+        return static_cast<void*>(const_cast< ShowTable*>(this));
+    return QMainWindow::qt_metacast(_clname);
+}
+
+int ShowTable::qt_metacall(QMetaObject::Call _c, int _id, void **_a)
+{
+    _id = QMainWindow::qt_metacall(_c, _id, _a);
+    if (_id < 0)
+        return _id;
+    if (_c == QMetaObject::InvokeMetaMethod) {
+        if (_id < 2)
+            qt_static_metacall(this, _c, _id, _a);
+        _id -= 2;
+    } else if (_c == QMetaObject::RegisterMethodArgumentMetaType) {
+        if (_id < 2)
+            *reinterpret_cast<int*>(_a[0]) = -1;
+        _id -= 2;
+    }
+    return _id;
+}
+QT_END_MOC_NAMESPACE

debug/moc_userwindow.cpp

+/****************************************************************************
+** Meta object code from reading C++ file 'userwindow.h'
+**
+** Created by: The Qt Meta Object Compiler version 67 (Qt 5.6.3)
+**
+** WARNING! All changes made in this file will be lost!
+*****************************************************************************/
+
+#include "../userwindow.h"
+#include <QtCore/qbytearray.h>
+#include <QtCore/qmetatype.h>
+#if !defined(Q_MOC_OUTPUT_REVISION)
+#error "The header file 'userwindow.h' doesn't include <QObject>."
+#elif Q_MOC_OUTPUT_REVISION != 67
+#error "This file was generated using the moc from 5.6.3. 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
+struct qt_meta_stringdata_UserWindow_t {
+    QByteArrayData data[12];
+    char stringdata0[157];
+};
+#define QT_MOC_LITERAL(idx, ofs, len) \
+    Q_STATIC_BYTE_ARRAY_DATA_HEADER_INITIALIZER_WITH_OFFSET(len, \
+    qptrdiff(offsetof(qt_meta_stringdata_UserWindow_t, stringdata0) + ofs \
+        - idx * sizeof(QByteArrayData)) \
+    )
+static const qt_meta_stringdata_UserWindow_t qt_meta_stringdata_UserWindow = {
+    {
+QT_MOC_LITERAL(0, 0, 10), // "UserWindow"
+QT_MOC_LITERAL(1, 11, 7), // "sendata"
+QT_MOC_LITERAL(2, 19, 0), // ""
+QT_MOC_LITERAL(3, 20, 12), // "QSqlDatabase"
+QT_MOC_LITERAL(4, 33, 7), // "getdata"
+QT_MOC_LITERAL(5, 41, 3), // "db1"
+QT_MOC_LITERAL(6, 45, 10), // "tablename1"
+QT_MOC_LITERAL(7, 56, 19), // "on_usrtable_clicked"
+QT_MOC_LITERAL(8, 76, 19), // "on_find_usr_clicked"
+QT_MOC_LITERAL(9, 96, 20), // "on_delet_usr_clicked"
+QT_MOC_LITERAL(10, 117, 17), // "on_goback_clicked"
+QT_MOC_LITERAL(11, 135, 21) // "on_updata_usr_clicked"
+
+    },
+    "UserWindow\0sendata\0\0QSqlDatabase\0"
+    "getdata\0db1\0tablename1\0on_usrtable_clicked\0"
+    "on_find_usr_clicked\0on_delet_usr_clicked\0"
+    "on_goback_clicked\0on_updata_usr_clicked"
+};
+#undef QT_MOC_LITERAL
+
+static const uint qt_meta_data_UserWindow[] = {
+
+ // content:
+       7,       // revision
+       0,       // classname
+       0,    0, // classinfo
+       7,   14, // methods
+       0,    0, // properties
+       0,    0, // enums/sets
+       0,    0, // constructors
+       0,       // flags
+       1,       // signalCount
+
+ // signals: name, argc, parameters, tag, flags
+       1,    2,   49,    2, 0x06 /* Public */,
+
+ // slots: name, argc, parameters, tag, flags
+       4,    2,   54,    2, 0x0a /* Public */,
+       7,    0,   59,    2, 0x08 /* Private */,
+       8,    0,   60,    2, 0x08 /* Private */,
+       9,    0,   61,    2, 0x08 /* Private */,
+      10,    0,   62,    2, 0x08 /* Private */,
+      11,    0,   63,    2, 0x08 /* Private */,
+
+ // signals: parameters
+    QMetaType::Void, 0x80000000 | 3, QMetaType::QString,    2,    2,
+
+ // slots: parameters
+    QMetaType::Void, 0x80000000 | 3, QMetaType::QString,    5,    6,
+    QMetaType::Void,
+    QMetaType::Void,
+    QMetaType::Void,
+    QMetaType::Void,
+    QMetaType::Void,
+
+       0        // eod
+};
+
+void UserWindow::qt_static_metacall(QObject *_o, QMetaObject::Call _c, int _id, void **_a)
+{
+    if (_c == QMetaObject::InvokeMetaMethod) {
+        UserWindow *_t = static_cast<UserWindow *>(_o);
+        Q_UNUSED(_t)
+        switch (_id) {
+        case 0: _t->sendata((*reinterpret_cast< QSqlDatabase(*)>(_a[1])),(*reinterpret_cast< QString(*)>(_a[2]))); break;
+        case 1: _t->getdata((*reinterpret_cast< QSqlDatabase(*)>(_a[1])),(*reinterpret_cast< QString(*)>(_a[2]))); break;
+        case 2: _t->on_usrtable_clicked(); break;
+        case 3: _t->on_find_usr_clicked(); break;
+        case 4: _t->on_delet_usr_clicked(); break;
+        case 5: _t->on_goback_clicked(); break;
+        case 6: _t->on_updata_usr_clicked(); break;
+        default: ;
+        }
+    } else if (_c == QMetaObject::IndexOfMethod) {
+        int *result = reinterpret_cast<int *>(_a[0]);
+        void **func = reinterpret_cast<void **>(_a[1]);
+        {
+            typedef void (UserWindow::*_t)(QSqlDatabase , QString );
+            if (*reinterpret_cast<_t *>(func) == static_cast<_t>(&UserWindow::sendata)) {
+                *result = 0;
+                return;
+            }
+        }
+    }
+}
+
+const QMetaObject UserWindow::staticMetaObject = {
+    { &QMainWindow::staticMetaObject, qt_meta_stringdata_UserWindow.data,
+      qt_meta_data_UserWindow,  qt_static_metacall, Q_NULLPTR, Q_NULLPTR}
+};
+
+
+const QMetaObject *UserWindow::metaObject() const
+{
+    return QObject::d_ptr->metaObject ? QObject::d_ptr->dynamicMetaObject() : &staticMetaObject;
+}
+
+void *UserWindow::qt_metacast(const char *_clname)
+{
+    if (!_clname) return Q_NULLPTR;
+    if (!strcmp(_clname, qt_meta_stringdata_UserWindow.stringdata0))
+        return static_cast<void*>(const_cast< UserWindow*>(this));
+    return QMainWindow::qt_metacast(_clname);
+}
+
+int UserWindow::qt_metacall(QMetaObject::Call _c, int _id, void **_a)
+{
+    _id = QMainWindow::qt_metacall(_c, _id, _a);
+    if (_id < 0)
+        return _id;
+    if (_c == QMetaObject::InvokeMetaMethod) {
+        if (_id < 7)
+            qt_static_metacall(this, _c, _id, _a);
+        _id -= 7;
+    } else if (_c == QMetaObject::RegisterMethodArgumentMetaType) {
+        if (_id < 7)
+            *reinterpret_cast<int*>(_a[0]) = -1;
+        _id -= 7;
+    }
+    return _id;
+}
+
+// SIGNAL 0
+void UserWindow::sendata(QSqlDatabase _t1, QString _t2)
+{
+    void *_a[] = { Q_NULLPTR, const_cast<void*>(reinterpret_cast<const void*>(&_t1)), const_cast<void*>(reinterpret_cast<const void*>(&_t2)) };
+    QMetaObject::activate(this, &staticMetaObject, 0, _a);
+}
+QT_END_MOC_NAMESPACE

main.cpp

+#include "mainwindow.h"
+#include <QApplication>
+
+int main(int argc, char *argv[])
+{
+    QApplication a(argc, argv);
+    MainWindow w;
+    w.show();
+
+    return a.exec();
+}

mainwindow.cpp

+#include "mainwindow.h"
+#include "ui_mainwindow.h"
+#include <QDebug>
+
+MainWindow::MainWindow(QWidget *parent) :
+    QMainWindow(parent),
+    ui(new Ui::MainWindow)
+{
+    ui->setupUi(this);
+    registwind = new Regist(this);
+    userwind = new UserWindow(this);
+    init_database();
+
+    connect(this,SIGNAL(sendinfo(QSqlDatabase,QString)),registwind,SLOT(getdata(QSqlDatabase,QString)));
+}
+
+MainWindow::~MainWindow()
+{
+    db.close();
+    delete ui;
+}
+
+void MainWindow::init_database()
+{
+    //数据库是否存在
+    if (QSqlDatabase::contains("mysqlite")) {
+        //存在
+        db = QSqlDatabase::database("mysqlite");
+    }
+    else {
+        //不存在，则创建
+        db = QSqlDatabase::addDatabase("QSQLITE");
+        db.setDatabaseName("user.db");
+    }
+    //打开数据库
+    if (!db.open()) {
+       QMessageBox::about(this,"提示","打开数据库失败!");
+    }
+    QSqlQuery sql_query(db);
+    QString sql = "create table if not exists "
+                  "user(id integer primary key autoincrement,"
+                  "username text not NULL ,password text not NULL);";
+    if (!sql_query.exec(sql)) {
+        QMessageBox::about(this,"提示","创建表失败!");
+        return;
+    }
+}
+
+//注册
+void MainWindow::on_pushButton_2_clicked()
+{
+    emit sendinfo(db,"user");
+    registwind->show();
+    this->hide();
+}
+
+//登录
+void MainWindow::on_pushButton_clicked()
+{
+    //查询数据库
+    QString username = ui->username->text();
+    QString password = ui->password->text();
+    QString sql = QString("select * from user where username = '%1' "
+                  "and `password` = '%2';").arg(username,password);
+    QSqlQuery sql_query(db);
+    if(!sql_query.exec(sql)) {
+        QMessageBox::about(this,"提示","没有找到用户");
+        return;
+    }
+    QString usname,psword;
+    while (sql_query.next()) {
+        usname = sql_query.value(1).toString();
+        psword = sql_query.value(2).toString();
+    }
+    if (usname == username && psword == password) {
+        QMessageBox::about(this,"提示","登录成功");
+        emit sendata(db,"user");
+        userwind->show();
+        this->hide();
+    }
+}

mainwindow.h

+#ifndef MAINWINDOW_H
+#define MAINWINDOW_H
+
+#include <QMainWindow>
+#include <regist.h>
+#include <userwindow.h>
+#include <QSqlDatabase>
+#include <QSqlQuery>
+#include <QSqlError>
+#include <QDebug>
+
+namespace Ui {
+class MainWindow;
+}
+
+class MainWindow : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    explicit MainWindow(QWidget *parent = 0);
+    ~MainWindow();
+    void init_database();
+
+signals:
+    void sendinfo(QSqlDatabase,QString);
+    void sendata(QSqlDatabase,QString);
+
+private slots:
+    void on_pushButton_2_clicked();
+
+    void on_pushButton_clicked();
+
+private:
+    Ui::MainWindow *ui;
+    QSqlDatabase db;
+    Regist *registwind;
+    UserWindow *userwind;
+};
+
+#endif // MAINWINDOW_H

mainwindow.ui

+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>MainWindow</class>
+ <widget class="QMainWindow" name="MainWindow">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>617</width>
+    <height>360</height>
+   </rect>
+  </property>
+  <property name="minimumSize">
+   <size>
+    <width>617</width>
+    <height>360</height>
+   </size>
+  </property>
+  <property name="maximumSize">
+   <size>
+    <width>617</width>
+    <height>360</height>
+   </size>
+  </property>
+  <property name="windowTitle">
+   <string>MainWindow</string>
+  </property>
+  <widget class="QWidget" name="centralWidget">
+   <widget class="QLabel" name="label">
+    <property name="geometry">
+     <rect>
+      <x>170</x>
+      <y>20</y>
+      <width>261</width>
+      <height>61</height>
+     </rect>
+    </property>
+    <property name="font">
+     <font>
+      <pointsize>24</pointsize>
+     </font>
+    </property>
+    <property name="text">
+     <string>欢迎进入xxx系统</string>
+    </property>
+    <property name="alignment">
+     <set>Qt::AlignCenter</set>
+    </property>
+   </widget>
+   <widget class="QWidget" name="">
+    <property name="geometry">
+     <rect>
+      <x>201</x>
+      <y>121</y>
+      <width>211</width>
+      <height>131</height>
+     </rect>
+    </property>
+    <layout class="QVBoxLayout" name="verticalLayout">
+     <item>
+      <layout class="QHBoxLayout" name="horizontalLayout">
+       <item>
+        <widget class="QLabel" name="label_2">
+         <property name="text">
+          <string>用户名：</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QLineEdit" name="username">
+         <property name="text">
+          <string/>
+         </property>
+         <property name="alignment">
+          <set>Qt::AlignCenter</set>
+         </property>
+         <property name="placeholderText">
+          <string>请输入用户名</string>
+         </property>
+        </widget>
+       </item>
+      </layout>
+     </item>
+     <item>
+      <layout class="QHBoxLayout" name="horizontalLayout_2">
+       <item>
+        <widget class="QLabel" name="label_3">
+         <property name="text">
+          <string>密  码：</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QLineEdit" name="password">
+         <property name="text">
+          <string/>
+         </property>
+         <property name="alignment">
+          <set>Qt::AlignCenter</set>
+         </property>
+         <property name="placeholderText">
+          <string>请输入密码</string>
+         </property>
+        </widget>
+       </item>
+      </layout>
+     </item>
+     <item>
+      <layout class="QHBoxLayout" name="horizontalLayout_3">
+       <item>
+        <widget class="QPushButton" name="pushButton">
+         <property name="text">
+          <string>登录</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QPushButton" name="pushButton_2">
+         <property name="text">
+          <string>注册</string>
+         </property>
+        </widget>
+       </item>
+      </layout>
+     </item>
+    </layout>
+   </widget>
+  </widget>
+ </widget>
+ <layoutdefault spacing="6" margin="11"/>
+ <resources/>
+ <connections/>
+</ui>

regist.cpp

+#include "regist.h"
+#include "ui_regist.h"
+#include <QMessageBox>
+
+Regist::Regist(QWidget *parent) :
+    QMainWindow(parent),
+    ui(new Ui::Regist)
+{
+    ui->setupUi(this);
+    this->setAttribute(Qt::WA_DeleteOnClose,1);
+}
+
+Regist::~Regist()
+{
+    delete ui;
+}
+
+void Regist::getdata(QSqlDatabase db1,QString tablename1) {
+    db = db1;
+    tablename = tablename1;
+}
+
+
+void Regist::on_pushButton_clicked()
+{
+    QString username = ui->usrname->text();
+    QString password = ui->psw->text();
+
+    QString sql = QString("insert into user(username,password) values('%1','%2');").arg(username).arg(password);
+
+    QSqlQuery sql_query(db);
+    if(!sql_query.exec(sql)) {
+        QMessageBox::about(this,"提示","注册失败");
+        return;
+    }
+    QMessageBox::about(this,"提示","注册成功");
+}
+
+void Regist::on_goback_clicked()
+{
+    this->parentWidget()->show();
+    this->hide();
+}

regist.h

+#ifndef REGIST_H
+#define REGIST_H
+
+#include <QMainWindow>
+#include <QSqlDatabase>
+#include <QSqlQuery>
+#include <QDebug>
+#include <QSqlError>
+
+namespace Ui {
+class Regist;
+}
+
+class Regist : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    explicit Regist(QWidget *parent = 0);
+    ~Regist();
+
+public slots:
+    void getdata(QSqlDatabase, QString);
+private slots:
+    void on_pushButton_clicked();
+
+    void on_goback_clicked();
+
+private:
+    Ui::Regist *ui;
+    QSqlDatabase db;
+    QString tablename;
+};
+
+#endif // REGIST_H

regist.ui

+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>Regist</class>
+ <widget class="QMainWindow" name="Regist">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>617</width>
+    <height>360</height>
+   </rect>
+  </property>
+  <property name="minimumSize">
+   <size>
+    <width>617</width>
+    <height>360</height>
+   </size>
+  </property>
+  <property name="maximumSize">
+   <size>
+    <width>617</width>
+    <height>360</height>
+   </size>
+  </property>
+  <property name="windowTitle">
+   <string>MainWindow</string>
+  </property>
+  <widget class="QWidget" name="centralwidget">
+   <widget class="QPushButton" name="goback">
+    <property name="geometry">
+     <rect>
+      <x>500</x>
+      <y>300</y>
+      <width>75</width>
+      <height>23</height>
+     </rect>
+    </property>
+    <property name="text">
+     <string>返回</string>
+    </property>
+   </widget>
+   <widget class="QPushButton" name="pushButton">
+    <property name="geometry">
+     <rect>
+      <x>240</x>
+      <y>240</y>
+      <width>121</width>
+      <height>21</height>
+     </rect>
+    </property>
+    <property name="minimumSize">
+     <size>
+      <width>0</width>
+      <height>0</height>
+     </size>
+    </property>
+    <property name="text">
+     <string>确认</string>
+    </property>
+   </widget>
+   <widget class="QLabel" name="label">
+    <property name="geometry">
+     <rect>
+      <x>210</x>
+      <y>80</y>
+      <width>191</width>
+      <height>41</height>
+     </rect>
+    </property>
+    <property name="font">
+     <font>
+      <pointsize>20</pointsize>
+     </font>
+    </property>
+    <property name="text">
+     <string>欢迎注册</string>
+    </property>
+    <property name="alignment">
+     <set>Qt::AlignCenter</set>
+    </property>
+   </widget>
+   <widget class="QWidget" name="">
+    <property name="geometry">
+     <rect>
+      <x>210</x>
+      <y>150</y>
+      <width>191</width>
+      <height>71</height>
+     </rect>
+    </property>
+    <layout class="QVBoxLayout" name="verticalLayout">
+     <item>
+      <layout class="QHBoxLayout" name="horizontalLayout">
+       <item>
+        <widget class="QLabel" name="label_2">
+         <property name="text">
+          <string>用户名</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QLineEdit" name="usrname"/>
+       </item>
+      </layout>
+     </item>
+     <item>
+      <layout class="QHBoxLayout" name="horizontalLayout_2">
+       <item>
+        <widget class="QLabel" name="label_3">
+         <property name="text">
+          <string>密  码</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QLineEdit" name="psw"/>
+       </item>
+      </layout>
+     </item>
+    </layout>
+   </widget>
+  </widget>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>

showtable.cpp

+#include "showtable.h"
+#include "ui_showtable.h"
+
+ShowTable::ShowTable(QWidget *parent) :
+    QMainWindow(parent),
+    ui(new Ui::ShowTable)
+{
+    ui->setupUi(this);
+}
+
+ShowTable::~ShowTable()
+{
+    delete ui;
+}
+
+
+void ShowTable::dowork(QSqlDatabase db,QString tablename)
+{
+    QSqlTableModel *model = new QSqlTableModel(ui->tableView,db);
+    model->setTable(tablename);
+    model->select();
+    model->setHeaderData(0,Qt::Horizontal,QObject::tr("编号"));
+    model->setHeaderData(1,Qt::Horizontal,QObject::tr("usrname"));
+    model->setHeaderData(2,Qt::Horizontal,QObject::tr("psw"));
+    ui->tableView->setModel(model);
+}
+
+void ShowTable::on_close_clicked()
+{
+    this->close();
+}

showtable.h

+#ifndef SHOWTABLE_H
+#define SHOWTABLE_H
+
+#include <QMainWindow>
+#include "QSqlDatabase"
+#include "QSqlQuery"
+#include "QDebug"
+#include "QSqlQueryModel"
+#include "qsql.h"
+#include "QSqlTableModel"
+
+namespace Ui {
+class ShowTable;
+}
+
+class ShowTable : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    explicit ShowTable(QWidget *parent = 0);
+    ~ShowTable();
+
+public slots:
+    void dowork(QSqlDatabase,QString);
+private slots:
+    void on_close_clicked();
+
+private:
+    Ui::ShowTable *ui;
+};
+
+#endif // SHOWTABLE_H

showtable.ui

+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>ShowTable</class>
+ <widget class="QMainWindow" name="ShowTable">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>430</width>
+    <height>338</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>MainWindow</string>
+  </property>
+  <widget class="QWidget" name="centralwidget">
+   <widget class="QTableView" name="tableView">
+    <property name="geometry">
+     <rect>
+      <x>60</x>
+      <y>40</y>
+      <width>311</width>
+      <height>241</height>
+     </rect>
+    </property>
+   </widget>
+   <widget class="QPushButton" name="close">
+    <property name="geometry">
+     <rect>
+      <x>350</x>
+      <y>300</y>
+      <width>75</width>
+      <height>23</height>
+     </rect>
+    </property>
+    <property name="text">
+     <string>关闭</string>
+    </property>
+   </widget>
+  </widget>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>

ui_regist.h

+/********************************************************************************
+** Form generated from reading UI file 'regist.ui'
+**
+** Created by: Qt User Interface Compiler version 5.6.3
+**
+** WARNING! All changes made in this file will be lost when recompiling UI file!
+********************************************************************************/
+
+#ifndef UI_REGIST_H
+#define UI_REGIST_H
+
+#include <QtCore/QVariant>
+#include <QtWidgets/QAction>
+#include <QtWidgets/QApplication>
+#include <QtWidgets/QButtonGroup>
+#include <QtWidgets/QHBoxLayout>
+#include <QtWidgets/QHeaderView>
+#include <QtWidgets/QLabel>
+#include <QtWidgets/QLineEdit>
+#include <QtWidgets/QMainWindow>
+#include <QtWidgets/QPushButton>
+#include <QtWidgets/QVBoxLayout>
+#include <QtWidgets/QWidget>
+
+QT_BEGIN_NAMESPACE
+
+class Ui_Regist
+{
+public:
+    QWidget *centralwidget;
+    QPushButton *goback;
+    QPushButton *pushButton;
+    QLabel *label;
+    QWidget *widget;
+    QVBoxLayout *verticalLayout;
+    QHBoxLayout *horizontalLayout;
+    QLabel *label_2;
+    QLineEdit *usrname;
+    QHBoxLayout *horizontalLayout_2;
+    QLabel *label_3;
+    QLineEdit *psw;
+
+    void setupUi(QMainWindow *Regist)
+    {
+        if (Regist->objectName().isEmpty())
+            Regist->setObjectName(QStringLiteral("Regist"));
+        Regist->resize(617, 360);
+        Regist->setMinimumSize(QSize(617, 360));
+        Regist->setMaximumSize(QSize(617, 360));
+        centralwidget = new QWidget(Regist);
+        centralwidget->setObjectName(QStringLiteral("centralwidget"));
+        goback = new QPushButton(centralwidget);
+        goback->setObjectName(QStringLiteral("goback"));
+        goback->setGeometry(QRect(500, 300, 75, 23));
+        pushButton = new QPushButton(centralwidget);
+        pushButton->setObjectName(QStringLiteral("pushButton"));
+        pushButton->setGeometry(QRect(240, 240, 121, 21));
+        pushButton->setMinimumSize(QSize(0, 0));
+        label = new QLabel(centralwidget);
+        label->setObjectName(QStringLiteral("label"));
+        label->setGeometry(QRect(210, 80, 191, 41));
+        QFont font;
+        font.setPointSize(20);
+        label->setFont(font);
+        label->setAlignment(Qt::AlignCenter);
+        widget = new QWidget(centralwidget);
+        widget->setObjectName(QStringLiteral("widget"));
+        widget->setGeometry(QRect(210, 150, 191, 71));
+        verticalLayout = new QVBoxLayout(widget);
+        verticalLayout->setObjectName(QStringLiteral("verticalLayout"));
+        verticalLayout->setContentsMargins(0, 0, 0, 0);
+        horizontalLayout = new QHBoxLayout();
+        horizontalLayout->setObjectName(QStringLiteral("horizontalLayout"));
+        label_2 = new QLabel(widget);
+        label_2->setObjectName(QStringLiteral("label_2"));
+
+        horizontalLayout->addWidget(label_2);
+
+        usrname = new QLineEdit(widget);
+        usrname->setObjectName(QStringLiteral("usrname"));
+
+        horizontalLayout->addWidget(usrname);
+
+
+        verticalLayout->addLayout(horizontalLayout);
+
+        horizontalLayout_2 = new QHBoxLayout();
+        horizontalLayout_2->setObjectName(QStringLiteral("horizontalLayout_2"));
+        label_3 = new QLabel(widget);
+        label_3->setObjectName(QStringLiteral("label_3"));
+
+        horizontalLayout_2->addWidget(label_3);
+
+        psw = new QLineEdit(widget);
+        psw->setObjectName(QStringLiteral("psw"));
+
+        horizontalLayout_2->addWidget(psw);
+
+
+        verticalLayout->addLayout(horizontalLayout_2);
+
+        Regist->setCentralWidget(centralwidget);
+
+        retranslateUi(Regist);
+
+        QMetaObject::connectSlotsByName(Regist);
+    } // setupUi
+
+    void retranslateUi(QMainWindow *Regist)
+    {
+        Regist->setWindowTitle(QApplication::translate("Regist", "MainWindow", Q_NULLPTR));
+        goback->setText(QApplication::translate("Regist", "\350\277\224\345\233\236", Q_NULLPTR));
+        pushButton->setText(QApplication::translate("Regist", "\347\241\256\350\256\244", Q_NULLPTR));
+        label->setText(QApplication::translate("Regist", "\346\254\242\350\277\216\346\263\250\345\206\214", Q_NULLPTR));
+        label_2->setText(QApplication::translate("Regist", "\347\224\250\346\210\267\345\220\215", Q_NULLPTR));
+        label_3->setText(QApplication::translate("Regist", "\345\257\206  \347\240\201", Q_NULLPTR));
+    } // retranslateUi
+
+};
+
+namespace Ui {
+    class Regist: public Ui_Regist {};
+} // namespace Ui
+
+QT_END_NAMESPACE
+
+#endif // UI_REGIST_H