前言：

海康威视的教程里面，关于C++的教程，编译环境是VS，所以想使用QTcreate对于海康威视的相机进行使用，包括查找设备，打开设备，关闭设备，开始采集，停止采集，软触发，触发一次，保存bmp，保存jpg，保存tiff，保存png，调节曝光，增益，帧率。

基础夯实：

在MVS中海康威视的相关教程：MVS链接
下载完成之后按照这个目录（我是下载的的D盘），可以找到VS的教程：D:\MVS\Development\Samples\VC\VS
如果你需要QT上的教程，请继续向下观看。

效果展示：

图片展示：

视频展示：

参考的资料：

在这个过程中，我参考了很多的资料，包括VS里面的例程代码，但是我水平有限，不能直接搬运VS中的代码。
资料：参考资料1，参考资料2
简单对资料进行说明，介绍了环境的安装，包括opencv，sdk的头文件，库文件，二次封装的MvCamera.h和MvCamera.cpp文件。环境的安装是极其容易出错的过程，环境没问题，其他的才能正常的运行。

遇到问题：

问题1：int64 does not

这个是你mingw设置的opencv，但是你却用msvc打开了。这个编译环境必须一致。

问题2：LNK2019

你的opencv库没有连接好，路径问题或者camke问题，系统环境问题这都是有可能的。

配置思路(这个很重要)

首先你下载MVS之后，里面lib文件和头文件，头文件全要（参考配置图片），库文件只要一个（MvCameraControl.lib）。你需要把二次封装的函数导入你的QT下面里面，就是MvCamera.h和MvCamera.cpp这两个文件，如果你只进行导入也可以，因为你用到了opencv，不要纠结要不要使用opencv，直接用就行了，很方便，当时纠结了，想直接使用那两个文件，一直被卡。opencv按照教程按装就行了，按照mingw那个流程，在QT的pro文件中使用绝对路径，别使用相对路径（不使用导入库那个选项），因为我当时导入库就没成功。头文件直接包含，在直接的文件中导入一下，看一下有没有报错，没有保存说明导入成功。这里的MvCamera.cpp和MvCamera.h是不能直接使用的，需要在里面添加一些内容，直接使用也是会报错，原因就是你使用了opencv。最后，大佬使用的是导入.h文件，我需要ui文件，我就自己进行更改了，如果有需要ui文件的，评论区发qq邮箱，我源码或者ui可以私发你学习。基本上按照这个思路，成功搭建环境到运行应该是没有问题的。

配置关键图片：

配置具体过程：

海康威视相机在QTcreate上的环境配置教程（qt+opencv+海康SDK）

核心代码：

MvCamera.h

/************************************************************************/
/* 以C++接口为基础，对常用函数进行二次封装，方便用户使用                */
/************************************************************************/

#ifndef _MV_CAMERA_H_
#define _MV_CAMERA_H_

#include "MvCameraControl.h"
#include <string.h>

#include "opencv2/opencv.hpp"

//注意此处可能会跟系统函数定义冲突
using namespace cv;

#ifndef MV_NULL
#define MV_NULL    0
#endif

class CMvCamera
{
public:
    CMvCamera();
    ~CMvCamera();

    // ch:获取SDK版本号 | en:Get SDK Version
    static int GetSDKVersion();

    // ch:枚举设备 | en:Enumerate Device
    static int EnumDevices(unsigned int nTLayerType, MV_CC_DEVICE_INFO_LIST* pstDevList);

    // ch:判断设备是否可达 | en:Is the device accessible
    static bool IsDeviceAccessible(MV_CC_DEVICE_INFO* pstDevInfo, unsigned int nAccessMode);

    // ch:打开设备 | en:Open Device
    int Open(MV_CC_DEVICE_INFO* pstDeviceInfo);

    // ch:关闭设备 | en:Close Device
    int Close();

    // ch:判断相机是否处于连接状态 | en:Is The Device Connected
    bool IsDeviceConnected();

    // ch:注册图像数据回调 | en:Register Image Data CallBack
    int RegisterImageCallBack(void(__stdcall* cbOutput)(unsigned char * pData, MV_FRAME_OUT_INFO_EX* pFrameInfo, void* pUser), void* pUser);

    // ch:开启抓图 | en:Start Grabbing
    int StartGrabbing();

    // ch:停止抓图 | en:Stop Grabbing
    int StopGrabbing();

    // ch:主动获取一帧图像数据 | en:Get one frame initiatively
    int GetImageBuffer(MV_FRAME_OUT* pFrame, int nMsec);

    // ch:释放图像缓存 | en:Free image buffer
    int FreeImageBuffer(MV_FRAME_OUT* pFrame);

    // ch:显示一帧图像 | en:Display one frame image
    int DisplayOneFrame(MV_DISPLAY_FRAME_INFO* pDisplayInfo);

    // ch:设置SDK内部图像缓存节点个数 | en:Set the number of the internal image cache nodes in SDK
    int SetImageNodeNum(unsigned int nNum);

    // ch:获取设备信息 | en:Get device information
    int GetDeviceInfo(MV_CC_DEVICE_INFO* pstDevInfo);

    // ch:获取GEV相机的统计信息 | en:Get detect info of GEV camera
    int GetGevAllMatchInfo(MV_MATCH_INFO_NET_DETECT* pMatchInfoNetDetect);

    // ch:获取U3V相机的统计信息 | en:Get detect info of U3V camera
    int GetU3VAllMatchInfo(MV_MATCH_INFO_USB_DETECT* pMatchInfoUSBDetect);

    // ch:获取和设置Int型参数，如 Width和Height，详细内容参考SDK安装目录下的 MvCameraNode.xlsx 文件
    // en:Get Int type parameters, such as Width and Height, for details please refer to MvCameraNode.xlsx file under SDK installation directory
    int GetIntValue(IN const char* strKey, OUT MVCC_INTVALUE_EX *pIntValue);
    int SetIntValue(IN const char* strKey, IN int64_t nValue);

    // ch:获取和设置Enum型参数，如 PixelFormat，详细内容参考SDK安装目录下的 MvCameraNode.xlsx 文件
    // en:Get Enum type parameters, such as PixelFormat, for details please refer to MvCameraNode.xlsx file under SDK installation directory
    int GetEnumValue(IN const char* strKey, OUT MVCC_ENUMVALUE *pEnumValue);
    int SetEnumValue(IN const char* strKey, IN unsigned int nValue);
    int SetEnumValueByString(IN const char* strKey, IN const char* sValue);
    int GetEnumEntrySymbolic(IN const char* strKey, IN MVCC_ENUMENTRY* pstEnumEntry);

    // ch:获取和设置Float型参数，如 ExposureTime和Gain，详细内容参考SDK安装目录下的 MvCameraNode.xlsx 文件
    // en:Get Float type parameters, such as ExposureTime and Gain, for details please refer to MvCameraNode.xlsx file under SDK installation directory
    int GetFloatValue(IN const char* strKey, OUT MVCC_FLOATVALUE *pFloatValue);
    int SetFloatValue(IN const char* strKey, IN float fValue);

    // ch:获取和设置Bool型参数，如 ReverseX，详细内容参考SDK安装目录下的 MvCameraNode.xlsx 文件
    // en:Get Bool type parameters, such as ReverseX, for details please refer to MvCameraNode.xlsx file under SDK installation directory
    int GetBoolValue(IN const char* strKey, OUT bool *pbValue);
    int SetBoolValue(IN const char* strKey, IN bool bValue);

    // ch:获取和设置String型参数，如 DeviceUserID，详细内容参考SDK安装目录下的 MvCameraNode.xlsx 文件UserSetSave
    // en:Get String type parameters, such as DeviceUserID, for details please refer to MvCameraNode.xlsx file under SDK installation directory
    int GetStringValue(IN const char* strKey, MVCC_STRINGVALUE *pStringValue);
    int SetStringValue(IN const char* strKey, IN const char * strValue);

    // ch:执行一次Command型命令，如 UserSetSave，详细内容参考SDK安装目录下的 MvCameraNode.xlsx 文件
    // en:Execute Command once, such as UserSetSave, for details please refer to MvCameraNode.xlsx file under SDK installation directory
    int CommandExecute(IN const char* strKey);

    // ch:探测网络最佳包大小(只对GigE相机有效) | en:Detection network optimal package size(It only works for the GigE camera)
    int GetOptimalPacketSize(unsigned int* pOptimalPacketSize);

    // ch:注册消息异常回调 | en:Register Message Exception CallBack
    int RegisterExceptionCallBack(void(__stdcall* cbException)(unsigned int nMsgType, void* pUser), void* pUser);

    // ch:注册单个事件回调 | en:Register Event CallBack
    int RegisterEventCallBack(const char* pEventName, void(__stdcall* cbEvent)(MV_EVENT_OUT_INFO * pEventInfo, void* pUser), void* pUser);

    // ch:强制IP | en:Force IP
    int ForceIp(unsigned int nIP, unsigned int nSubNetMask, unsigned int nDefaultGateWay);

    // ch:配置IP方式 | en:IP configuration method
    int SetIpConfig(unsigned int nType);

    // ch:设置网络传输模式 | en:Set Net Transfer Mode
    int SetNetTransMode(unsigned int nType);

    // ch:像素格式转换 | en:Pixel format conversion
    int ConvertPixelType(MV_CC_PIXEL_CONVERT_PARAM* pstCvtParam);

    // ch:保存图片 | en:save image
    int SaveImage(MV_SAVE_IMAGE_PARAM_EX* pstParam);

    // ch:保存图片为文件 | en:Save the image as a file
    int SaveImageToFile(MV_SAVE_IMG_TO_FILE_PARAM* pstParam);

    // ch:绘制圆形辅助线 | en:Draw circle auxiliary line
    int DrawCircle(MVCC_CIRCLE_INFO* pCircleInfo);

    // ch:绘制线形辅助线 | en:Draw lines auxiliary line
    int DrawLines(MVCC_LINES_INFO* pLinesInfo);

    //读取buffer
    int ReadBuffer(Mat &image);

private:

    void *m_hDevHandle;

    //用于保存图像的缓存
    unsigned int m_nBufSizeForSaveImage;

};

#endif//_MV_CAMERA_H_

MvCamera.cpp

#include "mvcamera.h"

CMvCamera::CMvCamera()
{
    m_hDevHandle = MV_NULL;
}

CMvCamera::~CMvCamera()
{
    if (m_hDevHandle)
    {
        MV_CC_DestroyHandle(m_hDevHandle);
        m_hDevHandle = MV_NULL;
    }
}

// ch:获取SDK版本号 | en:Get SDK Version
int CMvCamera::GetSDKVersion()
{
    return MV_CC_GetSDKVersion();
}

// ch:枚举设备 | en:Enumerate Device
int CMvCamera::EnumDevices(unsigned int nTLayerType, MV_CC_DEVICE_INFO_LIST* pstDevList)
{
    return MV_CC_EnumDevices(nTLayerType, pstDevList);
}

// ch:判断设备是否可达 | en:Is the device accessible
bool CMvCamera::IsDeviceAccessible(MV_CC_DEVICE_INFO* pstDevInfo, unsigned int nAccessMode)
{
    return MV_CC_IsDeviceAccessible(pstDevInfo, nAccessMode);
}

// ch:打开设备 | en:Open Device
int CMvCamera::Open(MV_CC_DEVICE_INFO* pstDeviceInfo)
{
    if (MV_NULL == pstDeviceInfo)
    {
        return MV_E_PARAMETER;
    }

    if (m_hDevHandle)
    {
        return MV_E_CALLORDER;
    }

    int nRet  = MV_CC_CreateHandle(&m_hDevHandle, pstDeviceInfo);
    if (MV_OK != nRet)
    {
        return nRet;
    }

    nRet = MV_CC_OpenDevice(m_hDevHandle);
    if (MV_OK != nRet)
    {
        MV_CC_DestroyHandle(m_hDevHandle);
        m_hDevHandle = MV_NULL;
    }

    return nRet;
}

// ch:关闭设备 | en:Close Device
int CMvCamera::Close()
{
    if (MV_NULL == m_hDevHandle)
    {
        return MV_E_HANDLE;
    }

    MV_CC_CloseDevice(m_hDevHandle);

    int nRet = MV_CC_DestroyHandle(m_hDevHandle);
    m_hDevHandle = MV_NULL;

    return nRet;
}

// ch:判断相机是否处于连接状态 | en:Is The Device Connected
bool CMvCamera::IsDeviceConnected()
{
    return MV_CC_IsDeviceConnected(m_hDevHandle);
}

// ch:注册图像数据回调 | en:Register Image Data CallBack
int CMvCamera::RegisterImageCallBack(void(__stdcall* cbOutput)(unsigned char * pData, MV_FRAME_OUT_INFO_EX* pFrameInfo, void* pUser), void* pUser)
{
    return MV_CC_RegisterImageCallBackEx(m_hDevHandle, cbOutput, pUser);
}

// ch:开启抓图 | en:Start Grabbing
int CMvCamera::StartGrabbing()
{
    return MV_CC_StartGrabbing(m_hDevHandle);
}

// ch:停止抓图 | en:Stop Grabbing
int CMvCamera::StopGrabbing()
{
    return MV_CC_StopGrabbing(m_hDevHandle);
}

// ch:主动获取一帧图像数据 | en:Get one frame initiatively
int CMvCamera::GetImageBuffer(MV_FRAME_OUT* pFrame, int nMsec)
{
    return MV_CC_GetImageBuffer(m_hDevHandle, pFrame, nMsec);
}

// ch:释放图像缓存 | en:Free image buffer
int CMvCamera::FreeImageBuffer(MV_FRAME_OUT* pFrame)
{
    return MV_CC_FreeImageBuffer(m_hDevHandle, pFrame);
}

// ch:设置显示窗口句柄 | en:Set Display Window Handle
int CMvCamera::DisplayOneFrame(MV_DISPLAY_FRAME_INFO* pDisplayInfo)
{
    return MV_CC_DisplayOneFrame(m_hDevHandle, pDisplayInfo);
}

// ch:设置SDK内部图像缓存节点个数 | en:Set the number of the internal image cache nodes in SDK
int CMvCamera::SetImageNodeNum(unsigned int nNum)
{
    return MV_CC_SetImageNodeNum(m_hDevHandle, nNum);
}

// ch:获取设备信息 | en:Get device information
int CMvCamera::GetDeviceInfo(MV_CC_DEVICE_INFO* pstDevInfo)
{
    return MV_CC_GetDeviceInfo(m_hDevHandle, pstDevInfo);
}

// ch:获取GEV相机的统计信息 | en:Get detect info of GEV camera
int CMvCamera::GetGevAllMatchInfo(MV_MATCH_INFO_NET_DETECT* pMatchInfoNetDetect)
{
    if (MV_NULL == pMatchInfoNetDetect)
    {
        return MV_E_PARAMETER;
    }

    MV_CC_DEVICE_INFO stDevInfo = {0};
    GetDeviceInfo(&stDevInfo);
    if (stDevInfo.nTLayerType != MV_GIGE_DEVICE)
    {
        return MV_E_SUPPORT;
    }

    MV_ALL_MATCH_INFO struMatchInfo = {0};

    struMatchInfo.nType = MV_MATCH_TYPE_NET_DETECT;
    struMatchInfo.pInfo = pMatchInfoNetDetect;
    struMatchInfo.nInfoSize = sizeof(MV_MATCH_INFO_NET_DETECT);
    memset(struMatchInfo.pInfo, 0, sizeof(MV_MATCH_INFO_NET_DETECT));

    return MV_CC_GetAllMatchInfo(m_hDevHandle, &struMatchInfo);
}

// ch:获取U3V相机的统计信息 | en:Get detect info of U3V camera
int CMvCamera::GetU3VAllMatchInfo(MV_MATCH_INFO_USB_DETECT* pMatchInfoUSBDetect)
{
    if (MV_NULL == pMatchInfoUSBDetect)
    {
        return MV_E_PARAMETER;
    }

    MV_CC_DEVICE_INFO stDevInfo = {0};
    GetDeviceInfo(&stDevInfo);
    if (stDevInfo.nTLayerType != MV_USB_DEVICE)
    {
        return MV_E_SUPPORT;
    }

    MV_ALL_MATCH_INFO struMatchInfo = {0};

    struMatchInfo.nType = MV_MATCH_TYPE_USB_DETECT;
    struMatchInfo.pInfo = pMatchInfoUSBDetect;
    struMatchInfo.nInfoSize = sizeof(MV_MATCH_INFO_USB_DETECT);
    memset(struMatchInfo.pInfo, 0, sizeof(MV_MATCH_INFO_USB_DETECT));

    return MV_CC_GetAllMatchInfo(m_hDevHandle, &struMatchInfo);
}

// ch:获取和设置Int型参数，如 Width和Height，详细内容参考SDK安装目录下的 MvCameraNode.xlsx 文件
// en:Get Int type parameters, such as Width and Height, for details please refer to MvCameraNode.xlsx file under SDK installation directory
int CMvCamera::GetIntValue(IN const char* strKey, OUT MVCC_INTVALUE_EX *pIntValue)
{
    return MV_CC_GetIntValueEx(m_hDevHandle, strKey, pIntValue);
}

int CMvCamera::SetIntValue(IN const char* strKey, IN int64_t nValue)
{
    return MV_CC_SetIntValueEx(m_hDevHandle, strKey, nValue);
}

// ch:获取和设置Enum型参数，如 PixelFormat，详细内容参考SDK安装目录下的 MvCameraNode.xlsx 文件
// en:Get Enum type parameters, such as PixelFormat, for details please refer to MvCameraNode.xlsx file under SDK installation directory
int CMvCamera::GetEnumValue(IN const char* strKey, OUT MVCC_ENUMVALUE *pEnumValue)
{
    return MV_CC_GetEnumValue(m_hDevHandle, strKey, pEnumValue);
}

int CMvCamera::SetEnumValue(IN const char* strKey, IN unsigned int nValue)
{
    return MV_CC_SetEnumValue(m_hDevHandle, strKey, nValue);
}

int CMvCamera::SetEnumValueByString(IN const char* strKey, IN const char* sValue)
{
    return MV_CC_SetEnumValueByString(m_hDevHandle, strKey, sValue);
}

int CMvCamera::GetEnumEntrySymbolic(IN const char* strKey, IN MVCC_ENUMENTRY* pstEnumEntry)
{
    return MV_CC_GetEnumEntrySymbolic(m_hDevHandle, strKey, pstEnumEntry);
}

// ch:获取和设置Float型参数，如 ExposureTime和Gain，详细内容参考SDK安装目录下的 MvCameraNode.xlsx 文件
// en:Get Float type parameters, such as ExposureTime and Gain, for details please refer to MvCameraNode.xlsx file under SDK installation directory
int CMvCamera::GetFloatValue(IN const char* strKey, OUT MVCC_FLOATVALUE *pFloatValue)
{
    return MV_CC_GetFloatValue(m_hDevHandle, strKey, pFloatValue);
}

int CMvCamera::SetFloatValue(IN const char* strKey, IN float fValue)
{
    return MV_CC_SetFloatValue(m_hDevHandle, strKey, fValue);
}

// ch:获取和设置Bool型参数，如 ReverseX，详细内容参考SDK安装目录下的 MvCameraNode.xlsx 文件
// en:Get Bool type parameters, such as ReverseX, for details please refer to MvCameraNode.xlsx file under SDK installation directory
int CMvCamera::GetBoolValue(IN const char* strKey, OUT bool *pbValue)
{
    return MV_CC_GetBoolValue(m_hDevHandle, strKey, pbValue);
}

int CMvCamera::SetBoolValue(IN const char* strKey, IN bool bValue)
{
    return MV_CC_SetBoolValue(m_hDevHandle, strKey, bValue);
}

// ch:获取和设置String型参数，如 DeviceUserID，详细内容参考SDK安装目录下的 MvCameraNode.xlsx 文件UserSetSave
// en:Get String type parameters, such as DeviceUserID, for details please refer to MvCameraNode.xlsx file under SDK installation directory
int CMvCamera::GetStringValue(IN const char* strKey, MVCC_STRINGVALUE *pStringValue)
{
    return MV_CC_GetStringValue(m_hDevHandle, strKey, pStringValue);
}

int CMvCamera::SetStringValue(IN const char* strKey, IN const char* strValue)
{
    return MV_CC_SetStringValue(m_hDevHandle, strKey, strValue);
}

// ch:执行一次Command型命令，如 UserSetSave，详细内容参考SDK安装目录下的 MvCameraNode.xlsx 文件
// en:Execute Command once, such as UserSetSave, for details please refer to MvCameraNode.xlsx file under SDK installation directory
int CMvCamera::CommandExecute(IN const char* strKey)
{
    return MV_CC_SetCommandValue(m_hDevHandle, strKey);
}

// ch:探测网络最佳包大小(只对GigE相机有效) | en:Detection network optimal package size(It only works for the GigE camera)
int CMvCamera::GetOptimalPacketSize(unsigned int* pOptimalPacketSize)
{
    if (MV_NULL == pOptimalPacketSize)
    {
        return MV_E_PARAMETER;
    }

    int nRet = MV_CC_GetOptimalPacketSize(m_hDevHandle);
    if (nRet < MV_OK)
    {
        return nRet;
    }

    *pOptimalPacketSize = (unsigned int)nRet;

    return MV_OK;
}

// ch:注册消息异常回调 | en:Register Message Exception CallBack
int CMvCamera::RegisterExceptionCallBack(void(__stdcall* cbException)(unsigned int nMsgType, void* pUser),void* pUser)
{
    return MV_CC_RegisterExceptionCallBack(m_hDevHandle, cbException, pUser);
}

// ch:注册单个事件回调 | en:Register Event CallBack
int CMvCamera::RegisterEventCallBack(const char* pEventName, void(__stdcall* cbEvent)(MV_EVENT_OUT_INFO * pEventInfo, void* pUser), void* pUser)
{
    return MV_CC_RegisterEventCallBackEx(m_hDevHandle, pEventName, cbEvent, pUser);
}

// ch:强制IP | en:Force IP
int CMvCamera::ForceIp(unsigned int nIP, unsigned int nSubNetMask, unsigned int nDefaultGateWay)
{
    return MV_GIGE_ForceIpEx(m_hDevHandle, nIP, nSubNetMask, nDefaultGateWay);
}

// ch:配置IP方式 | en:IP configuration method
int CMvCamera::SetIpConfig(unsigned int nType)
{
    return MV_GIGE_SetIpConfig(m_hDevHandle, nType);
}

// ch:设置网络传输模式 | en:Set Net Transfer Mode
int CMvCamera::SetNetTransMode(unsigned int nType)
{
    return MV_GIGE_SetNetTransMode(m_hDevHandle, nType);
}

// ch:像素格式转换 | en:Pixel format conversion
int CMvCamera::ConvertPixelType(MV_CC_PIXEL_CONVERT_PARAM* pstCvtParam)
{
    return MV_CC_ConvertPixelType(m_hDevHandle, pstCvtParam);
}

// ch:保存图片 | en:save image
int CMvCamera::SaveImage(MV_SAVE_IMAGE_PARAM_EX* pstParam)
{
    return MV_CC_SaveImageEx2(m_hDevHandle, pstParam);
}

// ch:保存图片为文件 | en:Save the image as a file
int CMvCamera::SaveImageToFile(MV_SAVE_IMG_TO_FILE_PARAM* pstSaveFileParam)
{
    return MV_CC_SaveImageToFile(m_hDevHandle, pstSaveFileParam);
}

// ch:绘制圆形辅助线 | en:Draw circle auxiliary line
int CMvCamera::DrawCircle(MVCC_CIRCLE_INFO* pCircleInfo)
{
    return MV_CC_DrawCircle(m_hDevHandle, pCircleInfo);
}

// ch:绘制线形辅助线 | en:Draw lines auxiliary line
int CMvCamera::DrawLines(MVCC_LINES_INFO* pLinesInfo)
{
    return MV_CC_DrawLines(m_hDevHandle, pLinesInfo);
}

//读取相机中的图像
int CMvCamera::ReadBuffer(Mat &image)
{
    Mat* getImage = new Mat();
    unsigned int nRecvBufSize = 0;
    MVCC_INTVALUE stParam;
    memset(&stParam, 0, sizeof(MVCC_INTVALUE));
    int tempValue = MV_CC_GetIntValue(m_hDevHandle, "PayloadSize", &stParam);
    if (tempValue != 0)
    {
        return -1;
    }
    nRecvBufSize = stParam.nCurValue;
    unsigned char* pDate;
    pDate=(unsigned char *)malloc(nRecvBufSize);

    MV_FRAME_OUT_INFO_EX stImageInfo = {0};
    tempValue= MV_CC_GetOneFrameTimeout(m_hDevHandle, pDate, nRecvBufSize, &stImageInfo, 700);
    if(tempValue!=0)
    {
        return -1;
    }
    m_nBufSizeForSaveImage = stImageInfo.nWidth * stImageInfo.nHeight * 3 + 2048;
    unsigned char* m_pBufForSaveImage;
    m_pBufForSaveImage = (unsigned char*)malloc(m_nBufSizeForSaveImage);


    bool isMono;
    switch (stImageInfo.enPixelType)
    {
    case PixelType_Gvsp_Mono8:
    case PixelType_Gvsp_Mono10:
    case PixelType_Gvsp_Mono10_Packed:
    case PixelType_Gvsp_Mono12:
    case PixelType_Gvsp_Mono12_Packed:
        isMono=true;
        break;
    default:
        isMono=false;
        break;
    }
    if(isMono)
    {
        *getImage = Mat(stImageInfo.nHeight,stImageInfo.nWidth,CV_8UC1,pDate);
        //imwrite("d:\\测试opencv_Mono.tif", image);
    }
    else
    {
        //转换图像格式为BGR8
        MV_CC_PIXEL_CONVERT_PARAM stConvertParam = {0};
        memset(&stConvertParam, 0, sizeof(MV_CC_PIXEL_CONVERT_PARAM));
        stConvertParam.nWidth = stImageInfo.nWidth;                 //ch:图像宽 | en:image width
        stConvertParam.nHeight = stImageInfo.nHeight;               //ch:图像高 | en:image height
        //stConvertParam.pSrcData = m_pBufForDriver;                  //ch:输入数据缓存 | en:input data buffer
        stConvertParam.pSrcData = pDate;                  //ch:输入数据缓存 | en:input data buffer
        stConvertParam.nSrcDataLen = stImageInfo.nFrameLen;         //ch:输入数据大小 | en:input data size
        stConvertParam.enSrcPixelType = stImageInfo.enPixelType;    //ch:输入像素格式 | en:input pixel format
        stConvertParam.enDstPixelType = PixelType_Gvsp_BGR8_Packed; //ch:输出像素格式 | en:output pixel format  适用于OPENCV的图像格式
        //stConvertParam.enDstPixelType = PixelType_Gvsp_RGB8_Packed; //ch:输出像素格式 | en:output pixel format
        stConvertParam.pDstBuffer = m_pBufForSaveImage;                    //ch:输出数据缓存 | en:output data buffer
        stConvertParam.nDstBufferSize = m_nBufSizeForSaveImage;            //ch:输出缓存大小 | en:output buffer size
        MV_CC_ConvertPixelType(m_hDevHandle, &stConvertParam);

        *getImage = Mat(stImageInfo.nHeight,stImageInfo.nWidth,CV_8UC3,m_pBufForSaveImage);
        //imwrite("d:\\测试opencv_Color.tif", image);
    }
    (*getImage).copyTo(image);
    (*getImage).release();
    free(pDate);
    free(m_pBufForSaveImage);
    return 0;
}

widget.cpp

#include "widget.h"
#include "ui_widget.h"
#include<QMessageBox>
#include<QDebug>
Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
    ,m_bOpenDevice(false)
    ,m_nDeviceCombo(0)
    ,m_nTriggerMode(MV_TRIGGER_MODE_OFF)
    ,m_bStartGrabbing(false)
    ,m_pcMyCamera(NULL)
    ,m_pSaveImageBuf(NULL)
    ,m_nSaveImageBufSize(0)
    ,m_bSoftWareTriggerCheck(false)
    , m_nTriggerSource(MV_TRIGGER_SOURCE_SOFTWARE)
    ,m_dExposureEdit(0)
    ,m_dGainEdit(0)
    ,m_dFrameRateEdit(0)
    ,m_isDeviceReady(false)
{
    m_WorkThread=new WorkThread(*this);
    ui->setupUi(this);
    setWindowTitle("海康相机");
    InitUi();
    connect(ui->searchDeviceBtn   ,SIGNAL(clicked()),this,SLOT(slot_searchDevice()));
    connect(ui->openDeviceBtn     ,SIGNAL(clicked()),this,SLOT(slot_openDevice()));
    connect(ui->closeDeviceBtn    ,SIGNAL(clicked()),this,SLOT(slot_closeDevice()));
    connect(ui->continusModeBtn   ,SIGNAL(clicked()),this,SLOT(slot_continusModeBtn()));
    connect(ui->triggerModeBtn    ,SIGNAL(clicked()),this,SLOT(slot_triggerModeBtn()));
    connect(ui->startGrabBtn      ,SIGNAL(clicked()),this,SLOT(slot_grabbingBtn()));

    connect(ui->softwareTriggerBtn,SIGNAL(stateChanged(int)),this,SLOT(slot_softwareTriggerBtn()));

    connect(ui->softwareOnceBtn   ,SIGNAL(clicked()),this,SLOT(slot_softwareoOnceBtn()));
    connect(ui->saveBmpBtn        ,SIGNAL(clicked()),this,SLOT(slot_saveBmpBtn()));
    connect(ui->saveJpgBtn        ,SIGNAL(clicked()),this,SLOT(slot_saveJpgBtn()));
    connect(ui->saveTiffBtn       ,SIGNAL(clicked()),this,SLOT(slot_saveTiffBtn()));
    connect(ui->savePngBtn        ,SIGNAL(clicked()),this,SLOT(slot_savePngBtn()));
    connect(ui->GetParamterBtn    ,SIGNAL(clicked()),this,SLOT(slot_getParameterBtn()));
    connect(ui->SetParameterBtn   ,SIGNAL(clicked()),this,SLOT(slot_setParameterBtn()));
    connect(ui->stopGrabBtn       ,SIGNAL(clicked()),this,SLOT(slot_stopGrbbingBtn()));
}

void Widget::slot_setParameterBtn()
{
    bool bIsSetSucceed = true;
    int nRet = SetExposureTime();
    if (nRet != MV_OK)
    {
        bIsSetSucceed = false;
        QMessageBox::critical(this,"Exposure","Set Exposure Time Fail");
    }
    nRet = SetGain();
    if (nRet != MV_OK)
    {
        bIsSetSucceed = false;
        QMessageBox::critical(this,"Gain","Set Gain Fail");
    }
    nRet = SetFrameRate();
    if (nRet != MV_OK)
    {
        bIsSetSucceed = false;
        QMessageBox::critical(this,"Frame","Set Frame Rate Fail");
    }

    if (true == bIsSetSucceed)
    {
        QMessageBox::critical(this,"Parameter","Set Parameter Succeed");
    }
}

void Widget::slot_stopGrbbingBtn()
{
    if (false == m_bOpenDevice || false == m_bStartGrabbing || NULL == m_pcMyCamera)
    {
        return;
    }
    m_WorkThread->SetRun(false);
    bool f=m_WorkThread->isRun();
    if(f)
    {
        m_WorkThread->quit();
        m_WorkThread->wait();
        m_WorkThread=NULL;
    }
    int nRet = m_pcMyCamera->StopGrabbing();
    if(MV_OK != nRet)
    {
        QMessageBox::critical(this,"grabbing","Stop grabbing fail");
        return;
    }
    m_bStartGrabbing = false;
}

int Widget::SetTriggerSource()
{
    int nRet = MV_OK;
    m_bSoftWareTriggerCheck=ui->softwareTriggerBtn->isChecked();
    if (m_bSoftWareTriggerCheck)
    {
        m_nTriggerSource = MV_TRIGGER_SOURCE_SOFTWARE;
        nRet = m_pcMyCamera->SetEnumValue("TriggerSource", m_nTriggerSource);
        if (MV_OK != nRet)
        {
            QMessageBox::critical(this,"Trigger","Set Software Trigger Fail");
            return nRet;
        }
        // GetDlgItem(IDC_SOFTWARE_ONCE_BUTTON )->EnableWindow(TRUE);
    }
    else
    {
        m_nTriggerSource = MV_TRIGGER_SOURCE_LINE0;
        nRet = m_pcMyCamera->SetEnumValue("TriggerSource", m_nTriggerSource);
        if (MV_OK != nRet)
        {
            QMessageBox::critical(this,"Hardware","Set Hardware Trigger Fail");
            return nRet;
        }
        //GetDlgItem(IDC_SOFTWARE_ONCE_BUTTON )->EnableWindow(FALSE);
    }
    return nRet;
}

int Widget::SetFrameRate()
{
    int nRet = m_pcMyCamera->SetBoolValue("AcquisitionFrameRateEnable", true);
    if (MV_OK != nRet)
    {
        return nRet;
    }

    bool ok;
    float frameRate = ui->FrameRateLineEdit->text().toDouble(&ok);
    if (!ok) {
        // 处理转换失败的情况，可能需要返回错误代码或显示错误消息
        return -1; // 示例错误代码
    }

    return m_pcMyCamera->SetFloatValue("AcquisitionFrameRate", (float)frameRate);
}

int Widget::SetGain()
{
    // 先尝试关闭自动增益
    m_pcMyCamera->SetEnumValue("GainAuto", 0);

    bool ok;
    float gain = ui->GainLineEdit->text().toDouble(&ok);
    if (!ok) {
        // 处理转换失败的情况
        return -1; // 示例错误代码
    }

    return m_pcMyCamera->SetFloatValue("Gain", (float)gain);
}

int Widget::SetExposureTime()
{
    int nRet = m_pcMyCamera->SetEnumValue("ExposureMode", MV_EXPOSURE_MODE_TIMED);
    if (MV_OK != nRet)
    {
        return nRet;
    }

    // 关闭自动曝光
    m_pcMyCamera->SetEnumValue("ExposureAuto", MV_EXPOSURE_AUTO_MODE_OFF);

    bool ok;
    float exposureTime = ui->ExposureLineEdit->text().toDouble(&ok);
    if (!ok) {
        // 处理转换失败的情况
        return -1; // 示例错误代码
    }

    return m_pcMyCamera->SetFloatValue("ExposureTime", (float)exposureTime);
}

int Widget::SetTriggerMode()
{
    return m_pcMyCamera->SetEnumValue("TriggerMode", m_nTriggerMode);
}

void Widget::slot_getParameterBtn()
{
    int nRet = GetTriggerMode();
    if (nRet != MV_OK)
    {
        QMessageBox::critical(this,"Mode","Get Trigger Mode Fail");
    }
    nRet = GetExposureTime();
    if (nRet != MV_OK)
    {
        QMessageBox::critical(this,"Mode","Get Exposure Time Fail");
    }
    ui->ExposureLineEdit->setText(QString("%1").arg(m_dExposureEdit));
    nRet = GetGain();
    if (nRet != MV_OK)
    {
        QMessageBox::critical(this,"Gain","Get Gain Fail");
    }
    ui->GainLineEdit->setText(QString("%1").arg(m_dGainEdit));
    nRet = GetFrameRate();
    if (nRet != MV_OK)
    {
        QMessageBox::critical(this,"Frame","Get Frame Rate Fail");
    }
    ui->FrameRateLineEdit->setText(QString("%1").arg(m_dFrameRateEdit));
    nRet = GetTriggerSource();
    if (nRet != MV_OK)
    {
        QMessageBox::critical(this,"Trigger","Get Trigger Source Fail");
    }

}

int Widget::GetTriggerSource()
{
    MVCC_ENUMVALUE stEnumValue = {0};

    int nRet = m_pcMyCamera->GetEnumValue("TriggerSource", &stEnumValue);
    if (MV_OK != nRet)
    {
        return nRet;
    }

    if ((unsigned int)MV_TRIGGER_SOURCE_SOFTWARE == stEnumValue.nCurValue)
    {
        m_bSoftWareTriggerCheck = true;
    }
    else
    {
        m_bSoftWareTriggerCheck = false;
    }

    return MV_OK;
}

int Widget::GetGain()
{
    MVCC_FLOATVALUE stFloatValue = {0};

    int nRet = m_pcMyCamera->GetFloatValue("Gain", &stFloatValue);
    if (MV_OK != nRet)
    {
        return nRet;
    }
    m_dGainEdit = stFloatValue.fCurValue;

    return MV_OK;
}

int Widget::GetFrameRate()
{
    MVCC_FLOATVALUE stFloatValue = {0};

    int nRet = m_pcMyCamera->GetFloatValue("ResultingFrameRate", &stFloatValue);
    if (MV_OK != nRet)
    {
        return nRet;
    }
    m_dFrameRateEdit = stFloatValue.fCurValue;

    return MV_OK;
}

int Widget::GetTriggerMode()
{
    MVCC_ENUMVALUE stEnumValue = {0};
    int nRet = m_pcMyCamera->GetEnumValue("TriggerMode", &stEnumValue);
    if(MV_OK != nRet)
    {
        return nRet;
    }
    m_nTriggerMode = stEnumValue.nCurValue;
    EnableControls();
    return MV_OK;
}

int Widget::GetExposureTime()
{
    MVCC_FLOATVALUE stFloatValue = {0};

    int nRet = m_pcMyCamera->GetFloatValue("ExposureTime", &stFloatValue);
    if(MV_OK != nRet)
    {
        return nRet;
    }
    m_dExposureEdit = stFloatValue.fCurValue;
    return MV_OK;
}

void Widget::slot_savePngBtn()
{
    int nRet = SaveImage(MV_Image_Png);
    if (MV_OK != nRet)
    {
        QMessageBox::critical(this,"picture","Save Png fail");
        return;
    }
    QMessageBox::critical(this,"picture","Save Png succeed!");
}

void Widget::slot_saveTiffBtn()
{
    int nRet = SaveImage(MV_Image_Tif);
    if (MV_OK != nRet)
    {
        QMessageBox::critical(this,"picture","Save jpg fail");
        return;
    }
    QMessageBox::critical(this,"picture","Save jpg succeed!");
}

void Widget::slot_saveJpgBtn()
{
    int nRet = SaveImage(MV_Image_Jpeg);
    if (MV_OK != nRet)
    {
        QMessageBox::critical(this,"picture","Save jpg fail");
        return;
    }
    QMessageBox::critical(this,"picture","Save jpg succeed!");
}

int Widget::SaveImage(MV_SAVE_IAMGE_TYPE enSaveImageType)
{
    MV_SAVE_IMG_TO_FILE_PARAM stSaveFileParam;
    memset(&stSaveFileParam, 0, sizeof(MV_SAVE_IMG_TO_FILE_PARAM));
    m_mutex.lock();
    if (m_pSaveImageBuf == NULL || m_stImageInfo.enPixelType == 0)
    {
        m_mutex.unlock();
        return MV_E_NODATA;
    }

    if(RemoveCustomPixelFormats(m_stImageInfo.enPixelType))
    {
        m_mutex.unlock();
        return MV_E_SUPPORT;
    }
    stSaveFileParam.enImageType = enSaveImageType;              // ch:需要保存的图像类型 | en:Image format to save
    stSaveFileParam.enPixelType = m_stImageInfo.enPixelType;    // ch:相机对应的像素格式 | en:Camera pixel type
    stSaveFileParam.nWidth      = m_stImageInfo.nWidth;         // ch:相机对应的宽 | en:Width
    stSaveFileParam.nHeight     = m_stImageInfo.nHeight;        // ch:相机对应的高 | en:Height
    stSaveFileParam.nDataLen    = m_stImageInfo.nFrameLen;
    stSaveFileParam.pData       = m_pSaveImageBuf;
    stSaveFileParam.iMethodValue = 0;

    // ch:jpg图像质量范围为(50-99], png图像质量范围为[0-9] | en:jpg image nQuality range is (50-99], png image nQuality range is [0-9]
    if (MV_Image_Bmp == stSaveFileParam.enImageType)
    {
        sprintf_s(stSaveFileParam.pImagePath, 256, "Image_w%d_h%d_fn%03d.bmp", stSaveFileParam.nWidth, stSaveFileParam.nHeight, m_stImageInfo.nFrameNum);
    }
    else if (MV_Image_Jpeg == stSaveFileParam.enImageType)
    {
        stSaveFileParam.nQuality = 80;
        sprintf_s(stSaveFileParam.pImagePath, 256, "Image_w%d_h%d_fn%03d.jpg", stSaveFileParam.nWidth, stSaveFileParam.nHeight, m_stImageInfo.nFrameNum);
    }
    else if (MV_Image_Tif == stSaveFileParam.enImageType)
    {
        sprintf_s(stSaveFileParam.pImagePath, 256, "Image_w%d_h%d_fn%03d.tif", stSaveFileParam.nWidth, stSaveFileParam.nHeight, m_stImageInfo.nFrameNum);
    }
    else if (MV_Image_Png == stSaveFileParam.enImageType)
    {
        stSaveFileParam.nQuality = 8;
        sprintf_s(stSaveFileParam.pImagePath, 256, "Image_w%d_h%d_fn%03d.png", stSaveFileParam.nWidth, stSaveFileParam.nHeight, m_stImageInfo.nFrameNum);
    }
    int nRet = m_pcMyCamera->SaveImageToFile(&stSaveFileParam);
    m_mutex.unlock();
    return nRet;
}

void Widget::slot_saveBmpBtn()
{
    int nRet = SaveImage(MV_Image_Bmp);
    if (MV_OK != nRet)
    {
        QMessageBox::critical(this,"picture","Save bmp fail");
        return;
    }
    QMessageBox::critical(this,"picture","Save bmp succeed!");
}

void Widget::slot_closeDevice()
{
    bool f=m_WorkThread->isRun();
    if (f)
    {
        m_WorkThread->quit();
        m_WorkThread->wait();
        m_WorkThread->SetRun(false);
    }

    if(m_pcMyCamera)
    {
        m_pcMyCamera->Close();
        delete m_pcMyCamera;
        m_pcMyCamera = NULL;
    }
    m_bStartGrabbing=false;
    m_bOpenDevice = false;
    if(m_pSaveImageBuf)
    {
        free(m_pSaveImageBuf);
        m_pSaveImageBuf=NULL;
    }
    m_nSaveImageBufSize=0;
    EnableControls();
}

void Widget::slot_continusModeBtn()
{
    m_nTriggerMode = MV_TRIGGER_MODE_OFF;
    m_pcMyCamera->SetEnumValue("TriggerMode", m_nTriggerMode);
    EnableControls();
}

void Widget::slot_triggerModeBtn()
{
    m_nTriggerMode = MV_TRIGGER_MODE_ON;
    m_pcMyCamera->SetEnumValue("TriggerMode", m_nTriggerMode);
    EnableControls();
}

void Widget::slot_grabbingBtn()
{
    if (false == m_bOpenDevice || true == m_bStartGrabbing || NULL == m_pcMyCamera)
    {
        return;
    }
    memset(&m_stImageInfo, 0, sizeof(MV_FRAME_OUT_INFO_EX));

    m_WorkThread->SetRun(true);
    m_WorkThread->start();

    int nRet = m_pcMyCamera->StartGrabbing();
    if (MV_OK != nRet)
    {
        m_WorkThread->SetRun(false);
        QMessageBox::information(this,"Device","Start grabbing fail");
        return;
    }
    m_bStartGrabbing = true;
    EnableControls();
}

void Widget::slot_softwareTriggerBtn()
{
    int nRet = MV_OK;
    m_bSoftWareTriggerCheck=ui->softwareTriggerBtn->isChecked();
    if (m_bSoftWareTriggerCheck)
    {
        m_nTriggerSource = MV_TRIGGER_SOURCE_SOFTWARE;
        nRet = m_pcMyCamera->SetEnumValue("TriggerSource", m_nTriggerSource);
        if (MV_OK != nRet)
        {
            QMessageBox::information(this,"Device","Set Software Trigger Fail");
            return;
        }
    }
    else
    {
        m_nTriggerSource = MV_TRIGGER_SOURCE_LINE0;
        nRet = m_pcMyCamera->SetEnumValue("TriggerSource", m_nTriggerSource);
        if (MV_OK != nRet)
        {
            QMessageBox::information(this,"Device","Set Hardware Trigger Fail");
            return;
        }
    }
    EnableControls();
    return;
}

void Widget::slot_softwareoOnceBtn()
{
    if(true != m_bStartGrabbing)
    {
        return;
    }
    m_pcMyCamera->CommandExecute("TriggerSoftware");
}

void Widget::InitUi()
{
    memset(&m_stImageInfo, 0, sizeof(MV_FRAME_OUT_INFO_EX));
    m_WorkThread->SetRun(false);
    EnableControls();
}

void  Widget::EnableControls()
{
    //如果查询到设备，开启打开设备按钮
    ui->openDeviceBtn->setEnabled(m_isDeviceReady?true:false);
    ui->closeDeviceBtn->setEnabled(m_bOpenDevice?true:false);
    ui->continusModeBtn->setEnabled(m_bOpenDevice?true:false);
    ui->triggerModeBtn->setEnabled(m_bOpenDevice?true:false);
    ui->startGrabBtn->setEnabled(m_bOpenDevice?true:false);
    ui->stopGrabBtn->setEnabled(m_bOpenDevice?true:false);

    //首先是否是在采集图像中，在采集图像的过程中，判断是否为触发模式，只有在触发模式下，才能开启软触发按钮。
    ui->softwareTriggerBtn->setEnabled(m_bStartGrabbing?((MV_TRIGGER_MODE_ON ==  m_nTriggerMode)?true:false):false);
    ui->softwareOnceBtn->setEnabled(
        (MV_TRIGGER_MODE_OFF ==  m_nTriggerMode) ? false:
            (m_bSoftWareTriggerCheck?true:false) );
    ui->saveBmpBtn->setEnabled(m_bStartGrabbing?true:false);
    ui->saveJpgBtn->setEnabled(m_bStartGrabbing?true:false);
    ui->saveTiffBtn->setEnabled(m_bStartGrabbing?true:false);
    ui->savePngBtn->setEnabled(m_bStartGrabbing?true:false);
    ui->GetParamterBtn->setEnabled(m_bOpenDevice?true:false);
    ui->SetParameterBtn  ->setEnabled(m_bOpenDevice?true:false);
    ui->ExposureLineEdit->setEnabled(m_bOpenDevice?true:false);
    ui->GainLineEdit->setEnabled(m_bOpenDevice?true:false);
    ui->FrameRateLineEdit->setEnabled(m_bOpenDevice?true:false);
}

bool Widget::RemoveCustomPixelFormats(MvGvspPixelType enPixelFormat)
{
    int nResult = enPixelFormat & MV_GVSP_PIX_CUSTOM;
    if(MV_GVSP_PIX_CUSTOM == nResult)
    {
        return true;
    }
    else
    {
        return false;
    }
}

void Widget::slot_openDevice()
{
    if (true == m_bOpenDevice || NULL != m_pcMyCamera)
    {
        return;
    }
    int nIndex = m_nDeviceCombo;
    if ((nIndex < 0) | (nIndex >= MV_MAX_DEVICE_NUM))
    {
        QMessageBox::critical(this,"Device","Device index is error!");
        return;
    }
    // ch:由设备信息创建设备实例 | en:Device instance created by device information
    if (NULL == m_stDevList.pDeviceInfo[nIndex])
    {
        QMessageBox::critical(this,"Device","Device does not exist!");
        return;
    }
    m_pcMyCamera = new CMvCamera;
    if (NULL == m_pcMyCamera)
    {
        return;
    }
    int nRet = m_pcMyCamera->Open(m_stDevList.pDeviceInfo[nIndex]);
    if (MV_OK != nRet)
    {
        delete m_pcMyCamera;
        m_pcMyCamera = NULL;
        QMessageBox::critical(this,"Device","Device Open error!");
        return;
    }
    // ch:探测网络最佳包大小(只对GigE相机有效) | en:Detection network optimal package size(It only works for the GigE camera)
    if (m_stDevList.pDeviceInfo[nIndex]->nTLayerType == MV_GIGE_DEVICE)
    {
        unsigned int nPacketSize = 0;
        nRet = m_pcMyCamera->GetOptimalPacketSize(&nPacketSize);
        if (nRet == MV_OK)
        {
            nRet = m_pcMyCamera->SetIntValue("GevSCPSPacketSize",nPacketSize);
            if(nRet != MV_OK)
            {
                QMessageBox::critical(this,"Device","Warning: Set Packet Size fail!");
            }
        }
        else
        {
            QMessageBox::critical(this,"Device","Warning: Get Packet Size fail!");
        }
    }
    m_bOpenDevice = true;
    EnableControls();
    slot_getParameterBtn();
}

void Widget::slot_searchDevice()
{
    QString strMsg;
    ui->comboBox->clear();
    memset(&m_stDevList, 0, sizeof(MV_CC_DEVICE_INFO_LIST));

    //ch:枚举子网内所有设备，将查询到的设备信息保存到m_stDevList列表中。
    int nRet   = CMvCamera::EnumDevices(MV_GIGE_DEVICE | MV_USB_DEVICE, &m_stDevList);
    if (MV_OK != nRet)
    {
        QMessageBox::critical(this,"device","No device!");
        return;
    }

    // ch:将值加入到信息列表框中并显示出来 | en:Add value to the information list box and display
    for (unsigned int i = 0; i < m_stDevList.nDeviceNum; i++)
    {
        MV_CC_DEVICE_INFO* pDeviceInfo = m_stDevList.pDeviceInfo[i];
        if (NULL == pDeviceInfo)
        {
            continue;
        }

        if (pDeviceInfo->nTLayerType == MV_USB_DEVICE)
        {

            char strUserName[256] = {0};
            sprintf_s(strUserName, 256, "%s %s (%s)", pDeviceInfo->SpecialInfo.stUsb3VInfo.chModelName,
                      pDeviceInfo->SpecialInfo.stUsb3VInfo.chModelName,
                      pDeviceInfo->SpecialInfo.stUsb3VInfo.chSerialNumber);

            QString  UserName(strUserName);

            QString strMsg = QString("USB %1").arg(QString::fromUtf8(reinterpret_cast<const char*>(pDeviceInfo->SpecialInfo.stUsb3VInfo.chSerialNumber)));
            ui->comboBox->addItem(strMsg);
        }
    }

    if (0 == m_stDevList.nDeviceNum)
    {

        QMessageBox::critical(this,"device","No device!");
        return;
    }
    ui->comboBox->setCurrentIndex(0);
    m_isDeviceReady=true;                                 //设备已经打开
    EnableControls();
}

Widget::~Widget()
{
    delete ui;
    slot_closeDevice();
}