在QSplitter PyQt应用程序中设置QTabWidget的初始大小

import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QSplitter, QTabWidget, QWidget, QVBoxLayout

class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()

        splitter = QSplitter(self)
        tab_widget = QTabWidget(splitter)

        # 创建并添加选项卡
        tab1 = QWidget()
        tab2 = QWidget()
        tab_widget.addTab(tab1, "Tab 1")
        tab_widget.addTab(tab2, "Tab 2")

        # 设置初始大小
        splitter.setSizes([200, 400])

        # 设置主窗口布局
        layout = QVBoxLayout()
        layout.addWidget(splitter)
        central_widget = QWidget()
        central_widget.setLayout(layout)
        self.setCentralWidget(central_widget)

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