在vc vs2017 ide中加入QT UI.

首先vs要安装QT 插件。QT VS Tools
然后右键工程目录里面需要建立UI文件的文件夹，添加-》新建项，选择QT，出现QT UI模板，选择需要的。

然后加入对应的xx.h 和xx.cpp

DlgRooms.h

#pragma once

#include <QDialog>
#include "ui_DlgRooms.h"

class DlgRooms : public QDialog
{
    Q_OBJECT

public slots:
    void myClick();

public:
    QJsonObject UrlRequestPost(const QString url, const QString data);
    DlgRooms(QWidget *parent = Q_NULLPTR);
    ~DlgRooms();

private:
    Ui::DlgRooms ui;
};

DlgRooms.cpp

#include "DlgRooms.h"
#include <QCryptographicHash>
#include <QtNetwork/QNetworkAccessManager>
#include <QtNetwork/QNetworkRequest>
#include <QtNetwork/QNetworkReply>
#include <QEventLoop>
#include <QTextCodec>
#include <QJsonArray>
#include <QJsonDocument>
#include <QJsonObject>
#include <QMessageBox>
#include "obs-app.hpp"


DlgRooms::DlgRooms(QWidget *parent): QDialog(parent){
    ui.setupUi(this);
    //connect(ui.okButton, SIGNAL(clicked()), this, SLOT(ClickButton()));
}

DlgRooms::~DlgRooms(){
}

void DlgRooms::myClick() {
    QString un = "";// ui.ltUserName->text();
    QString pwd = "";// ui.lePassword->text();

    QMessageBox box(QMessageBox::Warning, "", "用户名密码错误！");
    box.exec();

}

QJsonObject DlgRooms::UrlRequestPost(const QString url, const QString data)
{
    QJsonObject object;

    return object;
}

之后还要添加到CMakeList.txt

set(obs_SOURCES
    ${obs_PLATFORM_SOURCES}
    ${obs_libffutil_SOURCES}
    ../deps/json11/json11.cpp
    obs-app.cpp
    api-interface.cpp
    DlgRooms.cpp
        .
        .
        .

set(obs_HEADERS
    ${obs_PLATFORM_HEADERS}
    ${obs_libffutil_HEADERS}
    ../deps/json11/json11.hpp
    obs-app.hpp
    platform.hpp
    DlgRooms.h
        .
        .
        .

OK 了。 UI文件在QT设计师中编辑。然后绑定信号，槽神马的就可以了。