Qt - 自定义标题栏思路

有两种思路：

思路一、

在UI文件中自定义

思路二、

自定义一个title类

CustomTitleBar.h

#pragma once
#include <QWidget>
#include <QLabel>
#include <QPushButton>
#include <QHBoxLayout>


class CustomTitleBar : public QWidget 
{
public:
	CustomTitleBar(int w, int h, QWidget* parent = nullptr);
	~CustomTitleBar();

private:
	int m_w;
	int m_h;

	QLabel* titleLabel;
	QPushButton* minButton;
	QPushButton* maxButton;
	QPushButton* closeButton;
	QLabel* iconLabel;
};

CustomTitleBar.cpp

#include "CustomTitleBar.h"


CustomTitleBar::CustomTitleBar(int w, int h, QWidget* parent) :m_w(w),m_h(h), QWidget(parent)
{
    // 设置对象名用于样式表匹配
    setObjectName("customTitleBar");  // 新增关键代码

    setFixedWidth(m_w);
    setFixedHeight(m_h);  // 推荐高度
    // 创建控件
    titleLabel = new QLabel("My Application");
    minButton = new QPushButton("min");
    maxButton = new QPushButton("max");
    closeButton = new QPushButton("close");

    // 图标
    iconLabel = new QLabel;
    iconLabel->setPixmap(QPixmap(":/icons/app_icon.png").scaled(20, 20, Qt::KeepAspectRatio));
    

    // 设置黑色背景样式
    setStyleSheet(
        "#customTitleBar {"
        "    background: rgba(57,57,57,1);"      // 黑背景
        "}"
        "#customTitleBar QLabel {"
        "    color: #FFFFFF;"          // 修正文字颜色为白色
        "    font-weight: bold;"
        "    padding-left: 8px;"
        "}"
        "#customTitleBar QPushButton {"
        "    color: #FFFFFF;"          // 按钮文字白色
        "    border: none;"
        "    background: transparent;"
        "    min-width: 30px;"
        "}"
        "#customTitleBar QPushButton:hover {"
        "    background: rgba(255,255,255,0.1);"
        "}"
    );


    // 布局
    QHBoxLayout* layout = new QHBoxLayout(this);
    layout->addWidget(iconLabel);  // 添加到布局
    layout->addWidget(titleLabel);
    layout->addStretch();
    layout->addWidget(minButton);
    layout->addWidget(maxButton);
    layout->addWidget(closeButton);
    layout->setContentsMargins(5, 2, 5, 2);

    // 连接信号
    connect(minButton, &QPushButton::clicked, parent, &QWidget::showMinimized);
    connect(maxButton, &QPushButton::clicked, parent, &QWidget::showMaximized);
    connect(closeButton, &QPushButton::clicked, parent, &QWidget::close);
}

CustomTitleBar::~CustomTitleBar()
{

}