diff --git a/QtMyStyleEx/QtExample03/QtStyleEx/QtStyleEx.pro b/QtMyStyleEx/QtExample03/QtStyleEx/QtStyleEx.pro
index c9dad30..fd965a5 100644
--- a/QtMyStyleEx/QtExample03/QtStyleEx/QtStyleEx.pro
+++ b/QtMyStyleEx/QtExample03/QtStyleEx/QtStyleEx.pro
@@ -24,7 +24,8 @@
 #
 #-------------------------------------------------
 
-QT       += core gui
+#xxxPrivate 继承 Q-xxxx-Private的话，是需要的添加 core-private（有一些核心方法? 类 可能不开放）
+QT       += core gui core-private   # 若是需要继承 widgets相关，需要添加 widgets-private
 
 greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
 
@@ -47,11 +48,14 @@ CONFIG += c++11
 SOURCES += \
         main.cpp \
         widget.cpp \
-    mystyle.cpp
+    mystyle.cpp \
+    myswitchbutton.cpp
 
 HEADERS += \
         widget.h \
-    mystyle.h
+    mystyle.h \
+    myswitchbutton.h \
+    myswitchbutton_p.h
 
 # Default rules for deployment.
 qnx: target.path = /tmp/$${TARGET}/bin
diff --git a/QtMyStyleEx/QtExample03/QtStyleEx/mystyle.cpp b/QtMyStyleEx/QtExample03/QtStyleEx/mystyle.cpp
index d0378df..22b0123 100644
--- a/QtMyStyleEx/QtExample03/QtStyleEx/mystyle.cpp
+++ b/QtMyStyleEx/QtExample03/QtStyleEx/mystyle.cpp
@@ -30,6 +30,46 @@ MyStyle::MyStyle()
 
 }
 
+void MyStyle::drawPrimitive(MyStyle::PrimitiveElement pe, const QStyleOption *opt, QPainter *p, const QWidget *w) const
+{
+    proxy()->drawPrimitive(static_cast<QStyle::PrimitiveElement>(pe), opt, p, w);
+}
+
+void MyStyle::drawControl(MyStyle::ControlElement element, const QStyleOption *opt, QPainter *p, const QWidget *w) const
+{
+    proxy()->drawControl(static_cast<QStyle::ControlElement>(element), opt, p, w);
+}
+
+QRect MyStyle::subElementRect(MyStyle::SubElement subElement, const QStyleOption *option, const QWidget *widget) const
+{
+    return proxy()->subElementRect(static_cast<QStyle::SubElement>(subElement), option, widget);
+}
+
+//void MyStyle::drawComplexControl(MyStyle::ComplexControl cc, const QStyleOptionComplex *opt, QPainter *p, const QWidget *widget) const
+//{
+
+//}
+
+//QRect MyStyle::subControlRect(MyStyle::ComplexControl cc, const QStyleOptionComplex *opt, SubControl sc, const QWidget *widget) const
+//{
+//    return QRect();
+//}
+
+int MyStyle::pixelMetric(MyStyle::PixelMetric metric, const QStyleOption *option, const QWidget *widget) const
+{
+    return proxy()->pixelMetric(static_cast<QStyle::PixelMetric>(metric), option, widget);
+}
+
+//QSize MyStyle::sizeFromContents(MyStyle::ContentsType ct, const QStyleOption *opt, const QSize &contentsSize, const QWidget *w) const
+//{
+//    return QSize();
+//}
+
+//int MyStyle::styleHint(MyStyle::StyleHint stylehint, const QStyleOption *opt, const QWidget *widget, QStyleHintReturn *returnData) const
+//{
+//    return 0;
+//}
+
 void MyStyle::polish(QWidget *widget)
 {
     QCommonStyle::polish(widget);
@@ -40,8 +80,24 @@ void MyStyle::unpolish(QWidget *widget)
     QCommonStyle::unpolish(widget);
 }
 
+
 void MyStyle::drawPrimitive(QStyle::PrimitiveElement pe, const QStyleOption *opt, QPainter *p, const QWidget *w) const
 {
+    switch (pe) {
+    case PE_SwitchButtonGroove: {
+        if (const QStyleOptionButton* swtchBtn = qstyleoption_cast<const QStyleOptionButton*>(opt)) {
+            p->setBrush(Qt::red);
+            p->drawRoundedRect(swtchBtn->rect, 8, 8);
+        }
+    }
+        break;
+    case PE_SwitchButtonHandle: {
+
+    }
+        break;
+    default:
+        break;
+    }
     QCommonStyle::drawPrimitive(pe, opt, p, w);
 }
 
@@ -70,6 +126,19 @@ void MyStyle::drawControl(QStyle::ControlElement element, const QStyleOption *op
         p->fillRect(opt->rect, QColor("#de6161"));
         return;
     }
+    case CE_SwitchButton: {
+        if (const QStyleOptionButton *switchBtn = qstyleoption_cast<const QStyleOptionButton *>(opt)) {
+            QStyleOptionButton option = *switchBtn;
+            option.palette = switchBtn->palette;
+
+            option.rect = subElementRect(SE_SwitchButtonGroove, opt, w);
+            drawPrimitive(PE_SwitchButtonGroove, &option, p, w);
+
+            option.rect = subElementRect(SE_SwitchButtonHandle, opt, w);
+            drawPrimitive(PE_SwitchButtonHandle, &option, p, w);
+        }
+        break;
+    }
     default:
         break;
     }
@@ -79,6 +148,37 @@ void MyStyle::drawControl(QStyle::ControlElement element, const QStyleOption *op
 
 QRect MyStyle::subElementRect(QStyle::SubElement subElement, const QStyleOption *option, const QWidget *widget) const
 {
+    switch (subElement) {
+    case SE_SwitchButtonGroove: {
+        if (const QStyleOptionButton* switchBtn = qstyleoption_cast<const QStyleOptionButton*>(option))
+            return switchBtn->rect;
+    }
+        break;
+    case SE_SwitchButtonHandle: {
+        if (const QStyleOptionButton* switchBtn = qstyleoption_cast<const QStyleOptionButton*>(option)) {
+            int handleWidth = pixelMetric(PM_SwitchButtonHandleWidth, option, widget);
+                            //pixelMetric(PM_SwitchButtonHandleWidth, option, widget);
+            QRect rectHandle(0, 0, 0, 0);
+            rectHandle.setHeight(switchBtn->rect.height());
+
+            if (switchBtn->rect.width() / 2.0 <= handleWidth)
+                rectHandle.setWidth(switchBtn->rect.width() / 2.0);
+            else
+                rectHandle.setWidth(handleWidth);
+
+            if (switchBtn->state & QStyle::State_On)
+                rectHandle.moveRight(switchBtn->rect.right());
+            else
+                rectHandle.moveLeft(switchBtn->rect.left());
+
+            return rectHandle;
+        }
+    }
+        break;
+    default:
+        break;
+    }
+
     return QCommonStyle::subElementRect(subElement, option, widget);
 }
 
@@ -94,6 +194,15 @@ QRect MyStyle::subControlRect(QStyle::ComplexControl cc, const QStyleOptionCompl
 
 int MyStyle::pixelMetric(QStyle::PixelMetric metric, const QStyleOption *option, const QWidget *widget) const
 {
+    switch (metric) {
+    case PM_SwitchButtonHandleWidth:
+        return 30;
+    case PM_SwithcButtonHandleHeight:
+        return 12;
+    default:
+        break;
+    }
+
     return QCommonStyle::pixelMetric(metric, option, widget);
 }
 
diff --git a/QtMyStyleEx/QtExample03/QtStyleEx/mystyle.h b/QtMyStyleEx/QtExample03/QtStyleEx/mystyle.h
index acf8031..87921e6 100644
--- a/QtMyStyleEx/QtExample03/QtStyleEx/mystyle.h
+++ b/QtMyStyleEx/QtExample03/QtStyleEx/mystyle.h
@@ -26,21 +26,73 @@
 
 class MyStyle : public QCommonStyle
 {
+//    Q_OBJECT
+
+public:
+    //这里新增加的枚举，是属于 MyStyle:: , 而非 QStyle:: 范围
+    enum ControlElement {
+        CE_SwitchButton = QStyle::CE_CustomBase + 1,                   //switchButton 控件
+        CE_CustomBase = QStyle::CE_CustomBase + 0xf00000
+    };
+
+    enum SubElement {
+        SE_SwitchButtonGroove = QStyle::SE_CustomBase + 1,             //滑槽矩形大小
+        SE_SwitchButtonHandle,                                         //滑块矩形大小
+        SE_CustomBase = QStyle::SE_CustomBase + 0xf00000
+    };
+
+    enum PixelMetric {
+        PM_SwitchButtonHandleWidth = QStyle::PM_CustomBase + 1,        //switch Handle width
+        PM_SwithcButtonHandleHeight,                                   //switch Handle height
+        PM_CustomBase = QStyle::PM_CustomBase + 0xf00000
+    };
+
+    enum PrimitiveElement {
+        PE_SwitchButtonGroove = QStyle::PE_CustomBase + 1,             //滑槽
+        PE_SwitchButtonHandle,                                         //滑块
+        PE_CustomBase = QStyle::PE_CustomBase + 0xf00000
+    };
+
 public:
     MyStyle();
 
     // QStyle interface
 public:
+
+    //新增加的枚举属 MyStyle:: , 之能够在此内敛函数里面调用
+    inline void drawPrimitive(MyStyle::PrimitiveElement pe, const QStyleOption *opt, QPainter *p, const QWidget *w = nullptr) const;
+    inline void drawControl(MyStyle::ControlElement element, const QStyleOption *opt, QPainter *p, const QWidget *w) const;
+    inline QRect subElementRect(MyStyle::SubElement subElement, const QStyleOption *option, const QWidget *widget) const;
+//    inline void drawComplexControl(MyStyle::ComplexControl cc, const QStyleOptionComplex *opt, QPainter *p, const QWidget *widget) const;
+//    inline QRect subControlRect(MyStyle::ComplexControl cc, const QStyleOptionComplex *opt, SubControl sc, const QWidget *widget) const;
+    inline int pixelMetric(MyStyle::PixelMetric metric, const QStyleOption *option, const QWidget *widget) const;
+//    inline QSize sizeFromContents(MyStyle::ContentsType ct, const QStyleOption *opt, const QSize &contentsSize, const QWidget *w) const;
+//    inline int styleHint(MyStyle::StyleHint stylehint, const QStyleOption *opt, const QWidget *widget, QStyleHintReturn *returnData) const;
+
+    //这里的快捷方式创建的枚举,都是不带QStyle:: ; 但是快捷方式的定义是带是QStyle:: , 此处声明的地方必须加上 QStyle:: /*后面改写更复杂的得写上MyStyle:: 因添加自定义的枚举*/
+    //这里 override 的虚函数，只能够调用旧有的  QStyle:: 的函数
+    virtual void drawPrimitive(QStyle::PrimitiveElement pe, const QStyleOption *opt, QPainter *p, const QWidget *w) const override;
+    virtual void drawControl(QStyle::ControlElement element, const QStyleOption *opt, QPainter *p, const QWidget *w) const override;
+    virtual QRect subElementRect(QStyle::SubElement subElement, const QStyleOption *option, const QWidget *widget) const override;
+    virtual void drawComplexControl(QStyle::ComplexControl cc, const QStyleOptionComplex *opt, QPainter *p, const QWidget *widget) const override;
+    virtual QRect subControlRect(QStyle::ComplexControl cc, const QStyleOptionComplex *opt, SubControl sc, const QWidget *widget) const override;
+    virtual int pixelMetric(QStyle::PixelMetric metric, const QStyleOption *option, const QWidget *widget) const override;
+    virtual QSize sizeFromContents(QStyle::ContentsType ct, const QStyleOption *opt, const QSize &contentsSize, const QWidget *w) const override;
+    virtual int styleHint(QStyle::StyleHint stylehint, const QStyleOption *opt, const QWidget *widget, QStyleHintReturn *returnData) const override;
     virtual void polish(QWidget *widget) override;
     virtual void unpolish(QWidget *widget) override;
-    virtual void drawPrimitive(PrimitiveElement pe, const QStyleOption *opt, QPainter *p, const QWidget *w) const override;
-    virtual void drawControl(ControlElement element, const QStyleOption *opt, QPainter *p, const QWidget *w) const override;
-    virtual QRect subElementRect(SubElement subElement, const QStyleOption *option, const QWidget *widget) const override;
-    virtual void drawComplexControl(ComplexControl cc, const QStyleOptionComplex *opt, QPainter *p, const QWidget *widget) const override;
-    virtual QRect subControlRect(ComplexControl cc, const QStyleOptionComplex *opt, SubControl sc, const QWidget *widget) const override;
-    virtual int pixelMetric(PixelMetric metric, const QStyleOption *option, const QWidget *widget) const override;
-    virtual QSize sizeFromContents(ContentsType ct, const QStyleOption *opt, const QSize &contentsSize, const QWidget *w) const override;
-    virtual int styleHint(StyleHint stylehint, const QStyleOption *opt, const QWidget *widget, QStyleHintReturn *returnData) const override;
+
+    //重实现,使得父类的多个同名 函数 (不同参数) 任然可以在本类里面使用
+    using QCommonStyle::polish;
+    using QCommonStyle::unpolish;
+    using QCommonStyle::drawPrimitive;
+    using QCommonStyle::drawControl;
+    using QCommonStyle::subElementRect;
+    using QCommonStyle::drawComplexControl;
+    using QCommonStyle::subControlRect;
+    using QCommonStyle::pixelMetric;
+    using QCommonStyle::sizeFromContents;
+    using QCommonStyle::styleHint;
 
 };
 
diff --git a/QtMyStyleEx/QtExample03/QtStyleEx/myswitchbutton.cpp b/QtMyStyleEx/QtExample03/QtStyleEx/myswitchbutton.cpp
new file mode 100644
index 0000000..ddb444f
--- /dev/null
+++ b/QtMyStyleEx/QtExample03/QtStyleEx/myswitchbutton.cpp
@@ -0,0 +1,69 @@
+#include "myswitchbutton.h"
+#include "myswitchbutton_p.h"
+#include "mystyle.h"
+
+#include <QStylePainter>
+#include <QStyleOptionButton>
+
+MySwitchButton::MySwitchButton(QWidget *parent)
+    : QAbstractButton(parent)
+{
+    Q_D(MySwitchButton);
+
+    d->init();
+}
+
+MySwitchButton::~MySwitchButton()
+{
+
+}
+
+QSize MySwitchButton::sizeHint() const
+{
+    return QSize(100, 40);
+}
+
+void MySwitchButton::paintEvent(QPaintEvent *event)
+{
+    Q_UNUSED(event)
+
+    QStyleOptionButton opt;
+    initStyleOption(&opt);
+
+    QStylePainter pa(this);
+//    pa.drawControl(MyStyle::CE_SwitchButton, opt);
+}
+
+void MySwitchButton::initStyleOption(QStyleOptionButton *opt) const
+{
+    if (!opt)
+        return;
+
+    opt->init(this);
+    opt->initFrom(this);
+
+    if (isChecked())
+        opt->state |= QStyle::State_On;
+    else
+        opt->state |= QStyle::State_Off;
+}
+
+MySwitchButtonPrivate::MySwitchButtonPrivate()
+{
+}
+
+MySwitchButtonPrivate::~MySwitchButtonPrivate()
+{
+
+}
+
+void MySwitchButtonPrivate::init()
+{
+    Q_Q(MySwitchButton);
+
+    checked = false;
+    animationStart = 0;
+    animationEnd = 1;
+    q->setObjectName("MySwitchButton");
+//    q->connect(q, &MySwitchButton::toggled, q, &MySwitchButton::checkedChanged);
+}
diff --git a/QtMyStyleEx/QtExample03/QtStyleEx/myswitchbutton.h b/QtMyStyleEx/QtExample03/QtStyleEx/myswitchbutton.h
new file mode 100644
index 0000000..a72f9e1
--- /dev/null
+++ b/QtMyStyleEx/QtExample03/QtStyleEx/myswitchbutton.h
@@ -0,0 +1,29 @@
+#ifndef MYSWITCHBUTTON_H
+#define MYSWITCHBUTTON_H
+
+#include <QAbstractButton>
+class QStyleOptionButton;
+
+class MySwitchButtonPrivate;
+class MySwitchButton : public QAbstractButton//bianxinagjicengle QObject
+{
+    Q_OBJECT
+public:
+    explicit MySwitchButton(QWidget* parent = nullptr);
+    ~MySwitchButton();
+
+    // QWidget interface
+public:
+    virtual QSize sizeHint() const override;
+
+protected:
+    virtual void paintEvent(QPaintEvent *event) override;
+
+private:
+    void initStyleOption(QStyleOptionButton *opt) const;
+
+private:
+    Q_DECLARE_PRIVATE(MySwitchButton)
+};
+
+#endif // MYSWITCHBUTTON_H
diff --git a/QtMyStyleEx/QtExample03/QtStyleEx/myswitchbutton_p.h b/QtMyStyleEx/QtExample03/QtStyleEx/myswitchbutton_p.h
new file mode 100644
index 0000000..bc96f24
--- /dev/null
+++ b/QtMyStyleEx/QtExample03/QtStyleEx/myswitchbutton_p.h
@@ -0,0 +1,29 @@
+#ifndef MYSWITCHBUTTON_P_H
+#define MYSWITCHBUTTON_P_H
+
+#include <private/qobject_p.h>
+/*!
+ * \~chinese \class MySwitchButtonPrivate
+ * \~chinese \brief MySwitchButton 类的数据类， 便于实现源码/二进制兼容, 通常继承于 “自定义_Private” 的类
+ *                  若是自定义控件,没有继承于 QObjectPrivate 之类的, 使用 Q_Q Q_D 时候，会报错，需要自己定义 q_fun() 函数
+ * \~chinese \sa Qt 自带的 QPushButtonPrivate， QPushButton 实现
+ */
+
+class MySwitchButtonPrivate : public QObjectPrivate
+{
+public:
+    explicit MySwitchButtonPrivate();
+    ~MySwitchButtonPrivate();
+
+    void init();
+
+public:
+    bool checked;
+    double animationStart;
+    double animationEnd;
+
+public:
+    Q_DECLARE_PUBLIC(MySwitchButton)  //要加上宏
+};
+
+#endif // MYSWITCHBUTTON_P_H