PyQt中使用QTabWidget实现多页面布局的方法

from PyQt5.QtWidgets import *
from PyQt5.QtGui import *
from PyQt5.QtCore import *
import sys
class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.initUI()
    def initUI(self):
        self.setWindowTitle('多页面应用示例')
        # 创建中央部件和主布局
        central_widget = QWidget()
        self.setCentralWidget(central_widget)
        main_layout = QVBoxLayout(central_widget)
        # 创建标签控件
        self.tab_widget = QTabWidget()
        main_layout.addWidget(self.tab_widget)
        # 添加示例标签页
        self.add_tab("首页", self.create_home_page())
        self.add_tab("设置", self.create_settings_page())
        self.add_tab("关于", self.create_about_page())
        # 设置标签位置（可选：北/南/东/西）
        self.tab_widget.setTabPosition(QTabWidget.North)
        # 启用标签关闭按钮（可选）
        self.tab_widget.setTabsClosable(True)
        self.tab_widget.tabCloseRequested.connect(self.close_tab)
    def add_tab(self, name, widget):
        """添加新标签页"""
        self.tab_widget.addTab(widget, name)
    def close_tab(self, index):
        """关闭标签页"""
        widget = self.tab_widget.widget(index)
        if widget:
            widget.deleteLater()
        self.tab_widget.removeTab(index)

def create_home_page(self):
    """创建首页内容"""
    page = QWidget()
    layout = QVBoxLayout(page)
    # 添加响应式内容
    title = QLabel("欢迎使用")
    title.setAlignment(Qt.AlignCenter)
    title.setStyleSheet("font-size: 24px; font-weight: bold;")
    content = QTextEdit()
    content.setPlaceholderText("输入您的内容...")
    content.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
    btn_container = QHBoxLayout()
    btn_add = QPushButton("添加")
    btn_add.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Fixed)
    btn_container.addWidget(btn_add)
    layout.addWidget(title)
    layout.addWidget(content)
    layout.addLayout(btn_container)
    return page
def create_settings_page(self):
    """创建设置页面"""
    page = QWidget()
    layout = QFormLayout(page)
    # 添加表单元素
    layout.addRow(QLabel("主题颜色:"), QComboBox())
    layout.addRow(QLabel("字体大小:"), QSpinBox())
    layout.addRow(QLabel("自动保存:"), QCheckBox())
    return page
def create_about_page(self):
    """创建关于页面"""
    page = QWidget()
    layout = QVBoxLayout(page)
    logo = QLabel("应用图标")
    logo.setAlignment(Qt.AlignCenter)
    logo.setFixedSize(100, 100)
    logo.setStyleSheet("border: 1px solid #ccc;")
    info = QLabel("版本 1.0.0\n版权所有 © 2023")
    info.setAlignment(Qt.AlignCenter)
    layout.addWidget(logo)
    layout.addWidget(info)
    layout.addStretch()
    return page

def add_new_tab(self):
    """动态创建新标签"""
    count = self.tab_widget.count()
    new_page = QWidget()
    new_layout = QVBoxLayout(new_page)
    new_layout.addWidget(QLabel(f"这是第 {count+1} 个标签页"))
    self.add_tab(f"页面 {count+1}", new_page)
    self.tab_widget.setCurrentIndex(count)

# 设置标签形状（可选：圆形/三角形）
self.tab_widget.setTabShape(QTabWidget.Rounded)
# 自定义标签样式（通过QSS）
self.tab_widget.setStyleSheet("""
    QTabBar::tab {
        background: #f0f0f0;
        border: 1px solid #ccc;
        padding: 8px 16px;
    }
    QTabBar::tab:selected {
        background: #fff;
        border-bottom: 2px solid #2196F3;
    }
""")

layout.setStretch(0, 1)  # 第一个部件扩展
layout.setStretch(1, 2)  # 第二个部件双倍扩展

widget.setSizePolicy(QSizePolicy.Preferred, QSizePolicy.Maximum)

def resizeEvent(self, event):
    self.tab_widget.adjustSize()
    super().resizeEvent(event)

import sys
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.initUI()
    def initUI(self):
        self.setWindowTitle('多页面应用')
        self.setGeometry(300, 300, 800, 600)
        central_widget = QWidget()
        self.setCentralWidget(central_widget)
        main_layout = QVBoxLayout(central_widget)
        # 创建标签控件
        self.tab_widget = QTabWidget()
        main_layout.addWidget(self.tab_widget)
        # 添加示例标签
        self.add_tab("首页", self.create_home_page())
        self.add_tab("设置", self.create_settings_page())
        # 添加控制按钮
        btn_add = QPushButton("新建标签")
        btn_add.clicked.connect(self.add_new_tab)
        main_layout.addWidget(btn_add)
    def add_tab(self, name, widget):
        self.tab_widget.addTab(widget, name)
        self.tab_widget.setTabToolTip(self.tab_widget.count()-1, name)
    def add_new_tab(self):
        new_page = QWidget()
        layout = QVBoxLayout(new_page)
        text_edit = QTextEdit()
        layout.addWidget(text_edit)
        self.add_tab(f"新标签 {self.tab_widget.count()+1}", new_page)
        self.tab_widget.setCurrentIndex(self.tab_widget.count()-1)
    def create_home_page(self):
        page = QWidget()
        layout = QVBoxLayout(page)
        title = QLabel("首页内容")
        title.setAlignment(Qt.AlignCenter)
        title.setStyleSheet("font-size: 24px;")
        content = QTextEdit()
        content.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
        layout.addWidget(title)
        layout.addWidget(content)
        return page
    def create_settings_page(self):
        page = QWidget()
        layout = QFormLayout(page)
        layout.addRow(QLabel("选项1:"), QLineEdit())
        layout.addRow(QLabel("选项2:"), QComboBox())
        layout.addRow(QLabel("选项3:"), QCheckBox("启用"))
        return page
if __name__ == '__main__':
    app = QApplication(sys.argv)
    window = MainWindow()
    window.show()
    sys.exit(app.exec_())