Qt界面设计（隐藏窗体标题栏，制作按钮菜单）

最近工作需要，用到Qt，现在先写个小程序和大家分享下几个我觉比较重要的知识点，希望大家指正，以后再陆续更新

该例子主要功能有：

1，隐藏窗口标题栏，然后自己设计一个

2，新建close按钮

3，按钮菜单制作

void MyTest::Init(){    //隐藏窗口的标题栏    this->setWindowFlags(Qt::FramelessWindowHint | Qt::WindowSystemMenuHint | Qt::WindowMinMaxButtonsHint);    //添加窗口Close按钮    IconHelper::Instance()->SetIcon(ui->Btn_close, QChar(0xf00d), 10);    connect(ui->Btn_close, SIGNAL(clicked()), this, SLOT(close()));    //添加菜单按钮    IconHelper::Instance()->SetIcon(ui->Btn_Menu, QChar(0xf0c9), 10);}

void MyTest::on_Btn_Menu_clicked(){    QMenu *menu = new QMenu();    QAction *menu_new = new QAction(menu);    QAction *menu_open = new QAction(menu);    QAction *menu_close = new QAction(menu);    menu_new->setText(tr("登陆"));    menu_open->setText(tr("注册"));    menu_close->setText(tr("注销"));    menu->addAction(menu_new);    menu->addAction(menu_open);    menu->addAction(menu_close);    ui->Btn_Menu->setMenu(menu);}

加载qss文件

        

QString qss;    QFile qssFile(":/ui.qss");    qssFile.open(QFile::ReadOnly);    if(qssFile.isOpen())    {        qss = QLatin1String(qssFile.readAll());        qApp->setStyleSheet(qss);        qssFile.close();    }

iconhelper.cpp 和 iconhelper.h来源于网络

iconhelper.cpp

#include "iconhelper.h"IconHelper* IconHelper::_instance = 0;IconHelper::IconHelper(QObject*):    QObject(qApp){    QString runPath = QCoreApplication::applicationDirPath() + "./image/fontawesome-webfont.ttf";    int fontId = QFontDatabase::addApplicationFont(runPath);    QString fontName = QFontDatabase::applicationFontFamilies(fontId).at(0);    iconFont = QFont(fontName);}void IconHelper::SetIcon(QLabel* lab, QChar c, int size){    iconFont.setPointSize(size);    lab->setFont(iconFont);    lab->setText(c);}void IconHelper::SetIcon(QPushButton* btn, QChar c, int size){    iconFont.setPointSize(size);    btn->setFont(iconFont);    btn->setText(c);}

iconhelper.h

#ifndef ICONHELPER_H#define ICONHELPER_H#include <QObject>#include <QFont>#include <QFontDatabase>#include <QMutex>#include <QLabel>#include <QPushButton>#include <QApplication>class IconHelper : public QObject{private:    explicit IconHelper(QObject *parent = 0);    QFont iconFont;    static IconHelper* _instance;public:    static IconHelper* Instance()    {        static QMutex mutex;        if (!_instance) {            QMutexLocker locker(&mutex);            if (!_instance) {                _instance = new IconHelper;            }        }        return _instance;    }    void SetIcon(QLabel* lab, QChar c, int size = 10);    void SetIcon(QPushButton* btn, QChar c, int size = 10);};#endif // ICONHELPER_H

qss

.QPushButton#Btn_close, .QPushButton#Btn_Menu{        border-radius:0px;        color: #F0F0F0;        background-color:rgba(0,0,0,0);        border-style:none;}.QPushButton#Btn_close:hover{        background-color: qlineargradient(spread:pad, x1:0, y1:1, x2:0, y2:0, stop:0 rgba(238, 0, 0, 128), stop:1 rgba(238, 44, 44, 255));}.QPushButton#Btn_Menu:hover{        background-color: qlineargradient(spread:pad, x1:0, y1:1, x2:0, y2:0, stop:0 rgba(25, 134, 199, 0), stop:1 #636363);}.QPushButton#Btn_Menu:menu-indicator{        image: none;}.QWidget#widget{        background: qlineargradient(spread:pad, x1:0, y1:0, x2:0, y2:1, stop:0 #696969, stop:1 #808080);}.QMenu{        background-color:white;        padding: 1px;}.QMenu::item{        background-color:transparent;}.QMenu::item:selected{        background-color:rgb(234, 243, 253);        color: black;}.QLineEdit#lineEdit, .QLineEdit#lineEdit_2{        border: 1px solid #B8B8B8;        border-radius: 5px;        padding: 2px;        background: none;        selection-background-color: #454648;}.QLineEdit#lineEdit, .QLineEdit#lineEdit_2{        lineedit-password-character: 9679; }

运行效果：