Widget::Widget(QWidget *parent): QWidget(parent), ui(new Ui::Widget)
{ui->setupUi(this);//设置界面颜色样式this->setStyleSheet("background-color:rgb(54,54,54)");//创建文件菜单QMenu *fileMenuItems = new QMenu;//菜单添加iconfileMenuItems->setIcon(QIcon(":/resources/file.png"));fileMenuItems->setTitle(u8"文件");fileMenuItems->setStyleSheet(QString::fromStdString(menuItemQss));//为文件菜单添加项目QList<QAction*> acList;//具体项目// action添加iconQAction *openFileAc = new QAction(QIcon(":/resources/file.png"), u8"打开文件", this);//openFileAc->setShortcuts(QKeySequence::Print);       //设置快捷键openFileAc->setShortcut(QKeySequence("Ctrl+8"));  //随意指定快捷键QAction *openFloderAc = new QAction(u8"打开文件夹", this);QAction *openUrlAc = new QAction(u8"打开url", this);//添加菜单项acList << openFileAc << openFloderAc << openUrlAc;fileMenuItems->addActions(acList);QMenu *pMenu = new QMenu;  //主菜单pMenu->addMenu(fileMenuItems);//将文件菜单这个子菜单添加进主菜单//为主菜单添加项目QAction *play = new QAction(QIcon(":/resources/play.png"), u8"播放", this);QAction *tools = new QAction(QIcon(":/resources/tools.png"), u8"工具", this);pMenu->addAction(play);pMenu->addAction(tools);pMenu->addSeparator();//与文件菜单同级别的设置菜单QMenu *setMenuItems = new QMenu;setMenuItems->setTitle(u8"设置");setMenuItems->setIcon(QIcon(":/resources/set.png"));//为设置菜单添加项目QList<QAction*> setList;QAction *sysSetAc = new QAction(u8"系统设置", this);QAction *playSetAc = new QAction(u8"播放设置", this);QAction *zimuSetAc = new QAction(u8"字幕设置", this);setList << sysSetAc << playSetAc << zimuSetAc;setMenuItems->addActions(setList);setMenuItems->setStyleSheet(QString::fromStdString(menuItemQss));pMenu->addMenu(setMenuItems);pMenu->addSeparator();QAction *exitAc = new QAction(QIcon(":/resources/exit.png"), u8"退出", this);pMenu->addAction(exitAc);ui->pushButton->setMenu(pMenu);connect(openFileAc, &QAction::triggered, [=]{QString fileName = QFileDialog::getOpenFileName(this,u8"请选择视频文件","D:/","视频(*.mp4 *.flv);;");if(fileName.isEmpty()){return;}});ui->pushButton->setText(u8"QW影音");ui->pushButton->setFixedSize(100, 32);ui->pushButton->setStyleSheet(QString::fromStdString(button_qss));pMenu->setStyleSheet(QString::fromStdString(menuQss));
}

qss.h:

#ifndef QSS_H
#define QSS_H#include <string>using namespace std;string button_qss = R"(QPushButton{font:18px "Microsoft YaHei";color:rgb(255,255,255);border:none}QPushButton::menu-indicator:open{image:url(:/resources/down_arrow.svg);subcontrol-position:right center;subcontrol-origin:padding;border:none;}QPushButton::menu-indicator:closed{image:url(:/resources/up_arrow.svg);subcontrol-position:right center;subcontrol-origin:padding;border:none;}
)";string menuQss = R"(QMenu{background-color:rgb(53, 63, 73);}QMenu::item{font:16px;color:white;background-color:rgb(53, 63, 73);padding:8px 32px;margin:8px 8px;/*border-bottom:1px solid #DBDBDB;  item底部颜色*/}/*选择项设置*/QMenu::item:selected{background-color:rgb(54, 54, 54);}
)";string menuItemQss = R"(QMenu{background-color:rgb(73, 73, 73);}QMenu::item{font:16px;color:white;background-color:rgb(73, 73, 73);padding:8px 32px;margin:8px 8px;/*border-bottom:1px solid #DBDBDB;  item底部颜色*/}/*选择项设置*/QMenu::item:selected{background-color:rgb(54, 54, 54);}
)";#endif // QSS_H