STM32单片机项目实例：基于TouchGFX的智能手表设计（7）MVP架构下的交互逻辑设计
STM32单片机项目实例：基于TouchGFX的智能手表设计（7）MVP架构下的交互逻辑设计
目录
一、概述
二、MVP架构下的交互逻辑
一、概述
本文例程是基于 TouchGFX 的智能手表设计—Designer 软件 UI 设计的例程 0B-2_STM32U575_MVP_Interactive工程的拷贝，用于MVP架构下的逻辑代码添加。
二、MVP架构下的交互逻辑
将资料光盘中的0B-2_STM32U575_MVP_Interactive例程拷贝至工程目录，并将文件夹重命名为0B-3_STM32U575_MVP_Interactive，打开…\0B-3_STM32U575_MVP_Interactive\TouchGFX 下的0B-2_STM32U575_MVP_Interactive.touchgfx，点击DialPage，在Interactions增加GoToAPP的硬件交互，用于表盘页面与APP页面的切换（硬件按键触发）。
点击ApplicationPage，在Interactions增加GoToDial的硬件交互，用于APP页面与表盘页面的切换（硬件按键触发）。
点击右下角的.生成代码，打开MDK工程，进行工程的全编译。
点击工程管理目录下的gui，打开MenuElement.cpp与MenuElement.hpp,在MenuElement.hpp中添加Scroll Wheel的相关函数声明。
#ifndef MENUELEMENT_HPP
#define MENUELEMENT_HPP
//
#include
#include
#include
//
class MenuElement : public MenuElementBase
{
public:
MenuElement();
virtual ~MenuElement() {}
//
virtual void initialize();
int8_t number;
void offset(int16_t x);
virtual void setY(int16_t y);
void setNumber(int no);
protected:
//声明点击事件回调函数
Callback imageClickHandler;
//声明点击事件处理函数
void image_click_handler(const touchgfx::ScalableImage &image , const touchgfx::ClickEvent &event);
};
#endif // MENUELEMENT_HPP 在MenuElement.cpp文件中增加以下代码：
#include
MenuElement::MenuElement():imageClickHandler(this,&MenuElement::image_click_handler)
{
}
//
void MenuElement::initialize()
{
MenuElementBase::initialize();
}
//重新设置组件的x轴位置
void MenuElement::offset(int16_t x)
{
//设置图标位置
icon.moveTo(20 + x, icon.getY());
//设置文本位置，文本跟随图标移动
text.moveTo(43 + icon.getX(), 5 + icon.getY());
}
//点击图标后触发事件
void MenuElement::image_click_handler(const touchgfx::ScalableImage &image , const touchgfx::ClickEvent &event)
{
touchgfx::ClickEvent::ClickEventType type = event.getType();
if(type==touchgfx::ClickEvent::ClickEventType::PRESSED)
{
if(&image == &icon)
{
switch(number % 7)
{
case 0: //健康监测事件触发，健康监测图标与文字
icon.setBitmap(touchgfx::Bitmap(BITMAP_APPLICATIONPAGE_IMAGE_PRESSED_HEALTH_ID));
icon.invalidate();
//
break;
case 1: //姿态读取事件触发，姿态读取图标与文字
icon.setBitmap(touchgfx::Bitmap(BITMAP_APPLICATIONPAGE_IMAGE_PRESSED_6050_ID));
icon.invalidate();
//
break;
case 2: //事件触发，环境信息图标与文字
icon.setBitmap(touchgfx::Bitmap(BITMAP_APPLICATIONPAGE_IMAGE_PRESSED_TEMP_ID));
icon.invalidate();
//
break;
case 3: //芯片信息事件触发，芯片信息图标与文字
icon.setBitmap(touchgfx::Bitmap(BITMAP_APPLICATIONPAGE_IMAGE_PRESSED_CHIP_ID));
icon.invalidate();
//
break;
case 4: //振动控制事件触发，振动控制图标与文字
icon.setBitmap(touchgfx::Bitmap(BITMAP_APPLICATIONPAGE_IMAGE_PRESSED_BUZZER_ID));
icon.invalidate();
//
break;
case 5: //电池电量事件触发，电池电量图标与文字
icon.setBitmap(touchgfx::Bitmap(BITMAP_APPLICATIONPAGE_IMAGE_PRESSED_BATTERY_ID));
icon.invalidate();
//
break;
case 6: //无线连接事件触发，无线连接图标与文字
icon.setBitmap(touchgfx::Bitmap(BITMAP_APPLICATIONPAGE_IMAGE_PRESSED_WIFI_ID));
icon.invalidate();
//
break;
}
}
}
}
//
void MenuElement::setY(int16_t y)
{
MenuElementBase::setY(y);
//设定圆弧的半径，表盘直径-图标半径
const int circleRadius = 210;
//获取Y轴坐标信息
y = y + getHeight()/2 - 240 / 2;
//勾股定理计算X轴位置
float x_f = circleRadius - sqrtf(abs((float)(circleRadius * circleRadius) - (y * y)));
//重新设置组件的x轴位置
offset((int16_t)(x_f));
}
//对const的buf指针做强转去掉const
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wcast-qual"
//设置图标与文本
void MenuElement::setNumber(int no)
{
icon.setClickAction(imageClickHandler);
//修改图标
switch(no % 7)
{
case 0: //无触发事件时，健康监测图标与文字
icon.setBitmap(touchgfx::Bitmap(BITMAP_APPLICATIONPAGE_IMAGE_HEALTH_ID));
Unicode::snprintf(textBuffer, TEXT_SIZE, (Unicode::UnicodeChar*)L"健康监测");
break;
case 1: //无触发事件时，姿态读取图标与文字
icon.setBitmap(touchgfx::Bitmap(BITMAP_APPLICATIONPAGE_IMAGE_6050_ID));
Unicode::snprintf(textBuffer, TEXT_SIZE, (Unicode::UnicodeChar*)L"姿态感知");
break;
case 2: //无触发事件时，环境信息图标与文字
icon.setBitmap(touchgfx::Bitmap(BITMAP_APPLICATIONPAGE_IMAGE_TEMP_ID));
Unicode::snprintf(textBuffer, TEXT_SIZE, (Unicode::UnicodeChar*)L"环境信息");
break;
case 3: //无触发事件时，芯片信息图标与文字
icon.setBitmap(touchgfx::Bitmap(BITMAP_APPLICATIONPAGE_IMAGE_CHIPINFO_ID));
Unicode::snprintf(textBuffer, TEXT_SIZE, (Unicode::UnicodeChar*)L"芯片信息");
break;
case 4: //无触发事件时，振动控制图标与文字
icon.setBitmap(touchgfx::Bitmap(BITMAP_APPLICATIONPAGE_IMAGE_BUZZER_ID));
Unicode::snprintf(textBuffer, TEXT_SIZE,
(Unicode::UnicodeChar*)L"外部控制");
break;
case 5: //无触发事件时，电池电量图标与文字
icon.setBitmap(touchgfx::Bitmap(BITMAP_APPLICATIONPAGE_IMAGE_BATTERY_ID));
Unicode::snprintf(textBuffer, TEXT_SIZE, (Unicode::UnicodeChar*)L"电池电量");
break;
case 6: //无触发事件时，无线连接图标与文字
icon.setBitmap(touchgfx::Bitmap(BITMAP_APPLICATIONPAGE_IMAGE_WIFI_ID));
Unicode::snprintf(textBuffer, TEXT_SIZE, (Unicode::UnicodeChar*)L"无线连接");
break;
}
number = no;
}
点击ApplicationPageView.cpp,打开ApplicationPageView.hpp文件，添加APP页面的图标滚动与字体更变。
#ifndef APPLICATIONPAGEVIEW_HPP
#define APPLICATIONPAGEVIEW_HPP
#include
#include
class ApplicationPageView : public ApplicationPageViewBase
{
public:
ApplicationPageView();
virtual ~ApplicationPageView() {}
virtual void setupScreen();
virtual void tearDownScreen();
//实现APP页面的滚动图标与文字更新
virtual void AppScrollWheelUpdateItem(MenuElement& item,int16_t itemIndex)
{
item.setNumber(itemIndex);
}
protected:
};
#endif // APPLICATIONPAGEVIEW_HPP 点击MDK全编译，完成后，在Designer软件中设置ApplicationPage为启动窗口，点击右下角的仿真。
也可以在MDK中进行开发板的下载，下载完成后，复位开发板。FS-STM32U5开发板屏幕的展示效果与PC端仿真相同。
| 开发板的显示效果 |
PC端Designer仿真效果 |
 |
 |
打开ApplicationPageView.cpp /ApplicationPageView.hpp/ ApplicationPagePresenter.cpp/ ApplicationPagePresenter.hpp / Model.cpp / Model.hpp/ModelListener.hpp文件，添加硬件按键的触发。
在ApplicationPageView.cpp文件中添加页面的跳转。
#include
//
ApplicationPageView::ApplicationPageView()
{
}
//
void ApplicationPageView::setupScreen()
{
ApplicationPageViewBase::setupScreen();
}
//
void ApplicationPageView::tearDownScreen()
{
ApplicationPageViewBase::tearDownScreen();
}
//页面跳转
void ApplicationPageView::AppPageChange(uint8_t newFiveKeyFunc)
{
handleKeyEvent(newFiveKeyFunc);
} 在ApplicationPageView.hpp中添加函数声明
#ifndef APPLICATIONPAGEVIEW_HPP
#define APPLICATIONPAGEVIEW_HPP
#include
#include
class ApplicationPageView : public ApplicationPageViewBase
{
public:
ApplicationPageView();
virtual ~ApplicationPageView() {}
virtual void setupScreen();
virtual void tearDownScreen();
//页面跳转
void AppPageChange(uint8_t newFiveKeyFunc);
//实现APP页面的滚动图标与文字更新
virtual void AppScrollWheelUpdateItem(MenuElement& item,int16_t itemIndex)
{
item.setNumber(itemIndex);
}
protected:
};
#endif // APPLICATIONPAGEVIEW_HPP 在ApplicationPagePresenter.cpp文件中添加APP页面任务使能与页面切换代码。
#include
#include
ApplicationPagePresenter::ApplicationPagePresenter(ApplicationPageView& v)
: view(v)
{
}
//
void ApplicationPagePresenter::activate()
{
ApplicationPagePresenterState(true);
}
//
void ApplicationPagePresenter::deactivate()
{
ApplicationPagePresenterState(false);
}
//ApplicationPagePresenter状态
void ApplicationPagePresenter::ApplicationPagePresenterState(bool enable)
{
if(enable == true)
model->ApplicationPageViewTask(true);
else
model->ApplicationPageViewTask(false);
}
//页面跳转
void ApplicationPagePresenter::AppPageChange(uint8_t newFiveKeyFunc)
{
view.AppPageChange(newFiveKeyFunc);
} 在ApplicationPagePresenter.hpp文件中添加函数声明。
#ifndef APPLICATIONPAGEPRESENTER_HPP
#define APPLICATIONPAGEPRESENTER_HPP
#include
#include
using namespace touchgfx;
class ApplicationPageView;
class ApplicationPagePresenter : public touchgfx::Presenter, public ModelListener
{
public:
ApplicationPagePresenter(ApplicationPageView& v);
/**
* The activate function is called automatically when this screen is "switched in"
* (ie. made active). Initialization logic can be placed here.
*/
virtual void activate();
/**
* The deactivate function is called automatically when this screen is "switched out"
* (ie. made inactive). Teardown functionality can be placed here.
*/
virtual void deactivate();
virtual ~ApplicationPagePresenter() {};
//ApplicationPagePresenter状态
void ApplicationPagePresenterState(bool enable);
//页面跳转
virtual void AppPageChange(uint8_t newFiveKeyFunc);
private:
ApplicationPagePresenter();
ApplicationPageView& view;
};
#endif // APPLICATIONPAGEPRESENTER_HPP
在Model.cpp中添加与底层驱动的相关获取与控制代码。
#include
#include
#if defined LINK_HARDWARE //TuchGFX仿真与实际硬件操作隔离
//头文件包含
extern "C"
{
#include "user_app.h"
}
//底层数据
extern volatile SHT20_TemRH_Val gTemRH_Val;
extern RTC_DateTypeDef gSystemDate; //获取日期结构体
extern RTC_TimeTypeDef gSystemTime; //获取时间结构体
extern gTask_BitDef gTaskStateBit; //任务执行过程中使用到的标志位
extern gTask_MarkEN gTaskEnMark; //系统任务使能标识
extern volatile StruAP3216C_Val gAP3216C_Val; //AP3216数据结构
extern volatile uint8_t gLastTimeSeconds; //上一次的时间
extern volatile float pitch,roll,yaw; //欧拉角
extern unsigned long gSportStep; //运动步数
extern wifiRSSI ao_wifiRSSI;
extern uint8_t gFiveKeyFunc; //定义的五向按键值功能
extern volatile uint16_t gCurrentVal; //资源扩展板电流，通道IN8
extern volatile uint16_t gVoltageVal; //资源扩展板电压，通道IN9
extern volatile uint16_t gChipTempVal;//内部参考电压，通道IN12
extern volatile uint16_t gVrefVal; //内部参考电压，通道IN13
extern volatile uint16_t gVbatVal; //RTC电池电压，通道IN14
extern int32_t n_heart_rate; //heart rate value=n_heart_rate/4,采样率100sps,max30102设置4点求平均
extern int32_t n_sp02; //SPO2 value
extern int8_t ch_spo2_valid; //indicator to show if the SP02 calculation is valid
extern int8_t ch_hr_valid; //indicator to show if the heart rate calculation is valid
extern uint8_t gWiFiInfo[40]; //用于通知View界面的Text文本显示
//
volatile uint8_t gSwitchSpace = 0x00; //页面切换的时间间隙
static int32_t gHeartRate = 0; //表盘页面的心率数据
#else //Designer仿真
#include
#ifndef _MSC_VER
#include
#endif /* _MSC_VER*/
//
volatile uint8_t gBacklightVal = 50; //背光值，默认50%
#endif
/**********************************TouchGFX与底层间的访问**********************************/
Model::Model() : modelListener(0)
{
}
//
void Model::tick()
{
static uint8_t tickCount = 0; //减少数据上传的次数，优化界面刷新
tickCount++;
#if defined LINK_HARDWARE
//
if(gSwitchSpace != 0) gSwitchSpace--;
/********************************硬件页面切换*********************************/
//表盘页面
if(gTaskEnMark.UPDATE_DIAL_EN && (gTaskStateBit.TouchPress == 0) && (!gSwitchSpace))
{
modelListener->DialPageChange(gFiveKeyFunc);
gSwitchSpace = 0x0F; //使能切换时间计数
}
//应用页面
if(gTaskEnMark.UPDATE_APPPAGE && (gTaskStateBit.TouchPress == 0) && (!gSwitchSpace))
{
modelListener->AppPageChange(gFiveKeyFunc);
gSwitchSpace = 0x0F; //使能切换时间计数
}
/********************************更新各类信息*********************************/
//更新时间信息,为使表盘页面滑动操作正常，在屏幕被点按时不更新数据
if(gTaskEnMark.UPDATE_DIAL_EN && (gSystemTime.Seconds != gLastTimeSeconds)&&(gTaskStateBit.TouchPress == 0)) //每秒同步一次界面时间
{
modelListener->updateDate(gSystemDate.Year,gSystemDate.Month,gSystemDate.Date,gSystemDate.WeekDay);
modelListener->updateTime(gSystemTime.Hours, gSystemTime.Minutes,
gSystemTime.Seconds);
//更新新值
gLastTimeSeconds = gSystemTime.Seconds;
//更新温度/步数/心率
modelListener->updateTempStepHeart(gTemRH_Val.Tem,gSportStep,gHeartRate);
}
#else //Designer仿真
timeval timenow;
gettimeofday(&timenow, NULL);
//仿真更新时间
modelListener->updateTime((timenow.tv_sec / 60 / 60) % 24,(timenow.tv_sec / 60) % 60,timenow.tv_sec % 60);
#endif
}
/*********************gTaskEnMark赋值*************************/
//DialView的任务的状态
void Model::DialPageViewTask(bool enable)
{
#if defined LINK_HARDWARE
if(enable == true)
gTaskEnMark.UPDATE_DIAL_EN = 1; //任务使能
else
gTaskEnMark.UPDATE_DIAL_EN = 0; //任务清除
#endif
}
//ApplicationPageView的任务的状态
void Model::ApplicationPageViewTask(bool enable)
{
#if defined LINK_HARDWARE
if(enable == true)
gTaskEnMark.UPDATE_APPPAGE = 1; //任务使能
else
gTaskEnMark.UPDATE_APPPAGE = 0; //任务清除
#endif
} 在Model.hpp中添加相关函数的说明。
#ifndef MODEL_HPP
#define MODEL_HPP
class ModelListener;
class Model
{
public:
Model();
void bind(ModelListener* listener)
{
modelListener = listener;
}
void tick();
//DialPageView的任务的状态
void DialPageViewTask(bool enable);
//ApplicationPageView的任务的状态
void ApplicationPageViewTask(bool enable);
protected:
ModelListener* modelListener;
};
#endif // MODEL_HPP在ModelListener.hpp中添加相关虚函数。
#ifndef MODELLISTENER_HPP
#define MODELLISTENER_HPP
#include
extern "C" {
#include "stdint.h"
}
class ModelListener
{
public:
ModelListener() : model(0) {}
virtual ~ModelListener() {}
void bind(Model* m)
{
model = m;
}
//更新日期和时间
virtual void updateDate(uint8_t Year, uint8_t Month, uint8_t Date, uint8_t WeekDay) {}
virtual void updateTime(uint8_t Hours, uint8_t Minutes, uint8_t Seconds) {}
//页面跳转
virtual void DialPageChange(uint8_t newFiveKeyFunc){}
virtual void AppPageChange(uint8_t newFiveKeyFunc){}
//温度/步数/心率上传
virtual void updateTempStepHeart(float newTem, unsigned long newStep, uint32_t newHeartRate){}
protected:
Model* model;
};
#endif // MODELLISTENER_HPP
点击魔术棒图标，在C/C++选项卡增加LINK_HARDWARE的宏定义，用于PC端仿真与硬件底层驱动的隔离。
打开DialPageView.cpp / DialPageView.hpp/ DialPagePresenter.cpp/ DialPagePresenter.hpp文件，添加手表界面的信息上传代码。
在DialPageView.cpp文件中添加数字表盘与模拟表盘的数据更新代码。
#include
#include
#include "BitmapDatabase.hpp"
//标准库
#include
#include
//
DialPageView::DialPageView()
{
}
//
void DialPageView::setupScreen()
{
DialPageViewBase::setupScreen();
}
//
void DialPageView::tearDownScreen()
{
DialPageViewBase::tearDownScreen();
}
//更新时间
void DialPageView::updateTime(uint8_t newHours, uint8_t newMinutes, uint8_t newSeconds)
{
digitalClock.setTime24Hour(newHours, newMinutes, newSeconds);
analogClock.setTime24Hour(newHours,newMinutes,newSeconds);
}
//更新日期
void DialPageView::updateDate(uint8_t newYear, uint8_t newMonth, uint8_t newDate, uint8_t newWeekDay)
{
Unicode::snprintf(textSystemYearBuffer, TEXTSYSTEMYEAR_SIZE, "%04d", newYear + 2000);
textSystemYear.invalidate();
//
Unicode::snprintf(textSystemDateBuffer1, TEXTSYSTEMDATEBUFFER1_SIZE, "%02d", newMonth);
Unicode::snprintf(textSystemDateBuffer2, TEXTSYSTEMDATEBUFFER2_SIZE, "%02d", newDate);
textSystemDate.invalidate();
//
Unicode::snprintf(textWeekDayBuffer, TEXTWEEKDAY_SIZE, "%d", newWeekDay);
textWeekDay.invalidate();
//
Unicode::snprintf(DateWindowBuffer, DATEWINDOW_SIZE, "%02d", newDate);
DateWindow.invalidate();
//
}
//进入APP页面或快速设置界面
void DialPageView::DialPageChange(uint8_t newFiveKeyFunc)
{
handleKeyEvent(newFiveKeyFunc);
}
//更新温度、步数、心率数据
void DialPageView::updateTempStepHeart(float newTem, unsigned long newStep, uint32_t newHeartRate)
{
//更新温度-数字表盘
Unicode::snprintfFloat(textTempBuffer, TEXTTEMP_SIZE, "%.1f",newTem);
textTemp.invalidate();
//更新温度-模拟表盘
Unicode::snprintfFloat(textTemp_anBuffer, TEXTTEMP_AN_SIZE, "%.1f",newTem);
textTemp_an.invalidate();
//更新步数-数字表盘
Unicode::snprintf(textStepBuffer, TEXTSTEP_SIZE, "%d",newStep);
textStep.invalidate();
//更新步数-模拟表盘
Unicode::snprintf(textStep_anBuffer, TEXTSTEP_AN_SIZE, "%d",newStep);
textStep_an.invalidate();
//更新脉搏-数字表盘
Unicode::snprintf(textPulseBuffer, TEXTPULSE_SIZE, "%d",newHeartRate);
textPulse.invalidate();
//更新脉搏-模拟表盘
Unicode::snprintf(textPulse_anBuffer, TEXTPULSE_AN_SIZE, "%d",newHeartRate);
textPulse_an.invalidate();
} 在DialPageView.hpp文件中添加声明。
#ifndef DIALPAGEVIEW_HPP
#define DIALPAGEVIEW_HPP
#include
#include
class DialPageView : public DialPageViewBase
{
public:
DialPageView();
virtual ~DialPageView() {}
virtual void setupScreen();
virtual void tearDownScreen();
//更新日期和时间
virtual void updateDate(uint8_t newYear, uint8_t newMonth, uint8_t newDate, uint8_t newWeekDay);
virtual void updateTime(uint8_t newHours, uint8_t newMinutes, uint8_t newSeconds);
virtual void DialPageChange(uint8_t newFiveKeyFunc);
//温度/步数/心率信息上传
void updateTempStepHeart(float newTem, unsigned long newStep, uint32_t newHeartRate);
protected:
};
#endif // DIALPAGEVIEW_HPP 在DialPagePresenter.cpp添加屏幕任务的使能与数据交互。
#include
#include
//
DialPagePresenter::DialPagePresenter(DialPageView& v)
: view(v)
{
}
//
void DialPagePresenter::activate()
{
DialPagePresenterState(true);
}
//
void DialPagePresenter::deactivate()
{
DialPagePresenterState(false);
}
//DialPagePresenter
void DialPagePresenter::DialPagePresenterState(bool enable)
{
if(enable == true)
model->DialPageViewTask(true);
else
model->DialPageViewTask(false);
}
//更新时间
void DialPagePresenter::updateTime(uint8_t newHours, uint8_t newMinutes, uint8_t newSeconds)
{
view.updateTime(newHours, newMinutes, newSeconds);
}
//更新日期
void DialPagePresenter::updateDate(uint8_t newYear, uint8_t newMonth, uint8_t newDate, uint8_t newWeekDay)
{
view.updateDate(newYear, newMonth, newDate, newWeekDay);
}
//五向按键切换页面
void DialPagePresenter::DialPageChange(uint8_t newFiveKeyFunc)
{
view.DialPageChange(newFiveKeyFunc);
}
//更新温度/步数/心率
void DialPagePresenter::updateTempStepHeart(float newTem, unsigned long newStep, uint32_t newHeartRate)
{
view.updateTempStepHeart(newTem,newStep,newHeartRate);
}
在DialPagePresenter.hpp添加以下代码。
#ifndef DIALPAGEPRESENTER_HPP
#define DIALPAGEPRESENTER_HPP
#include
#include
using namespace touchgfx;
class DialPageView;
class DialPagePresenter : public touchgfx::Presenter, public ModelListener
{
public:
DialPagePresenter(DialPageView& v);
/**
* The activate function is called automatically when this screen is "switched in"
* (ie. made active). Initialization logic can be placed here.
*/
virtual void activate();
/**
* The deactivate function is called automatically when this screen is "switched out"
* (ie. made inactive). Teardown functionality can be placed here.
*/
virtual void deactivate();
virtual ~DialPagePresenter() {};
//DialPagePresenter的状态
void DialPagePresenterState(bool enable);
//更新日期和时间
virtual void updateDate(uint8_t newYear, uint8_t newMonth, uint8_t newDate, uint8_t newWeekDay);
virtual void updateTime(uint8_t newHours, uint8_t newMinutes, uint8_t newSeconds);
virtual void DialPageChange(uint8_t newFiveKeyFunc);
//更新温度/步数/心率
virtual void updateTempStepHeart(float newTem, unsigned long newStep, uint32_t newHeartRate);
private:
DialPagePresenter();
DialPageView& view;
};
#endif // DIALPAGEPRESENTER_HPP 点击全编译，运行PC端的仿真，下载至开发板，进行代码的验证。
PC端的仿真结果。
