QStackedWidget是一个堆栈窗口控件，用于管理多个堆叠的子部件。它只显示当前选中的子部件，而隐藏其余的子部件。

例子：

ControlWidget窗口中，创建QStackedWidget，分别添加两个组件，为Test1Widget和Test2Widget，两个组件都添加ViewOnButton，通过ViewOnButton切换两个组件。

from PyQt5.QtWidgets import *
import sysclass ViewOnButton(QPushButton):def __init__(self, is_view=True):super().__init__()self.is_view = is_viewself.init_ui()def init_ui(self):self.setMaximumWidth(100)if self.is_view:self.setText(" 画面1")font_color = "rgb(70, 106, 170)"else:self.setText(" 画面2")font_color = "rgb(231, 197, 111)"style_str = """QPushButton {{background-color: rgb(240, 254, 230);border-style: outset;border-width: 2px;border-color: #8f8f91;border-radius: 6px;padding: 6px;font-size: 16px;font-weight: bold;color: {};}}""".format(font_color)self.setStyleSheet(style_str)class Test1Widget(QWidget):"""动态视图页面"""def __init__(self):super(Test1Widget, self).__init__()self.main_layout = QVBoxLayout()self.main_layout.setContentsMargins(10, 10, 10, 10)self.setStyleSheet("background-color: blue;")self.setLayout(self.main_layout)self.label = QLabel("我是组件1画面")h_layout = QHBoxLayout()h_layout.addStretch(1)self.preview_btn = ViewOnButton(is_view=False)h_layout.addWidget(self.preview_btn)self.main_layout.addLayout(h_layout)self.main_layout.addWidget(self.label)def get_btn(self):return self.preview_btnclass Test2Widget(QWidget):"""动态视图页面"""def __init__(self):super(Test2Widget, self).__init__()self.main_layout = QVBoxLayout()self.main_layout.setContentsMargins(10, 10, 10, 10)self.setStyleSheet("background-color: yellow;")self.setLayout(self.main_layout)self.label = QLabel("我是组件2画面")h_layout = QHBoxLayout()h_layout.addStretch(1)self.view_btn = ViewOnButton(is_view=True)h_layout.addWidget(self.view_btn)self.main_layout.addLayout(h_layout)self.main_layout.addWidget(self.label)def get_btn(self):return self.view_btnclass ControlWidget(QWidget):"""控制主页面"""def __init__(self):super(ControlWidget, self).__init__()self.resize(400, 200)self.setWindowTitle("切换页面测试")self.main_layout = QVBoxLayout()self.main_layout.setContentsMargins(10, 10, 10, 10)self.setLayout(self.main_layout)self.stacked_widget = QStackedWidget()self.main_layout.addWidget(self.stacked_widget)self.widget1 = Test2Widget()self.widget2 = Test1Widget()self.stacked_widget.addWidget(self.widget1)self.stacked_widget.addWidget(self.widget2)self.case_btn = self.widget1.get_btn()self.view_btn = self.widget2.get_btn()self.case_btn.clicked.connect(self.switch_to_view)self.view_btn.clicked.connect(self.switch_to_case)def switch_to_view(self):self.stacked_widget.setCurrentWidget(self.widget2)def switch_to_case(self):self.stacked_widget.setCurrentWidget(self.widget1)app = QApplication(sys.argv)
window = ControlWidget()
window.show()
sys.exit(app.exec_())

结果：