堆叠窗口QStackedWidget

经常将QStackedWidget和QListWidget或者QListView搭配使用

 import sys
 from PyQt5.QtWidgets import QApplication, QWidget, QStackedWidget, QLabel, QLineEdit, QDateEdit, \
     QComboBox, QTextEdit, QListWidget, QGridLayout, QHBoxLayout

 class Demo(QWidget):
     def __init__(self):
         super(Demo, self).__init__()
         self.stack1 = QWidget() #实例化一个窗口
         self.stack2 = QWidget()
         self.stack3 = QTextEdit()

         self.stack1_init()
         self.stack2_init()

         self.stacked_widget = QStackedWidget(self)  # 创建一个堆叠窗口【虚拟窗口】
         self.stacked_widget.addWidget(self.stack1)  #给堆叠窗口添加子窗口或子控件
         self.stacked_widget.addWidget(self.stack2)
         self.stacked_widget.addWidget(self.stack3)
         self.stacked_widget.currentChanged.connect(lambda: print(self.stacked_widget.currentIndex()))
         #堆叠窗口发生变化时，都会触发信号
         #self.stacked_widget.currentIndex()返回堆叠窗口序列号

         self.list_widget = QListWidget(self)  #创建列表控件--用来放标签项
         self.list_widget.addItem('Basic Info')   #在列表控件中添加标签项。参数：标签显示文本
         self.list_widget.addItem('Contact Info')
         self.list_widget.addItem('More Info')
         self.list_widget.clicked.connect(self.change_func) #单击列表控件时触发信号

         self.h_layout = QHBoxLayout()
         self.h_layout.addWidget(self.list_widget)
         self.h_layout.addWidget(self.stacked_widget)

         self.setLayout(self.h_layout)

     def stack1_init(self):
         name_label = QLabel('姓名:', self.stack1)
         gender_label = QLabel('性别:', self.stack1)
         bd_label = QLabel('出生日期:', self.stack1)

         name_line = QLineEdit(self.stack1)
         items = ['请选择性别', '男', '女']
         gender_combo = QComboBox(self.stack1)
         gender_combo.addItems(items)
         bd_dateedit = QDateEdit(self.stack1)

         g_layout = QGridLayout()
         g_layout.addWidget(name_label, 0, 0, 1, 1)
         g_layout.addWidget(name_line, 0, 1, 1, 1)
         g_layout.addWidget(gender_label, 2, 0, 1, 1)
         g_layout.addWidget(gender_combo, 2, 1, 1, 1)
         g_layout.addWidget(bd_label, 3, 0, 1, 1)
         g_layout.addWidget(bd_dateedit, 3, 1, 1, 1)

         self.stack1.setLayout(g_layout)

     def stack2_init(self):
         tel_label = QLabel('Tel:', self.stack2)
         mobile_label = QLabel('Mobile:', self.stack2)
         add_label = QLabel('Address:', self.stack2)

         tel_line = QLineEdit(self.stack2)
         mobile_line = QLineEdit(self.stack2)
         add_line = QLineEdit(self.stack2)

         g_layout = QGridLayout()
         g_layout.addWidget(tel_label, 0, 0, 1, 1)
         g_layout.addWidget(tel_line, 0, 1, 1, 1)
         g_layout.addWidget(mobile_label, 1, 0, 1, 1)
         g_layout.addWidget(mobile_line, 1, 1, 1, 1)
         g_layout.addWidget(add_label, 2, 0, 1, 1)
         g_layout.addWidget(add_line, 2, 1, 1, 1)

         self.stack2.setLayout(g_layout)

     def change_func(self):
         self.stacked_widget.setCurrentIndex(self.list_widget.currentIndex().row())
         #设置堆叠窗口显示指定索引的窗口
         #self.list_widget.currentIndex().row() 返回当前列表选中项的索引号

 if __name__ == '__main__':
     app = QApplication(sys.argv)
     demo = Demo()
     demo.show()
     sys.exit(app.exec_())

样式：