PySide / PyQt:如何自动切换到下一个输入字段

from PySide2.QtWidgets import QApplication, QMainWindow, QLineEdit, QVBoxLayout, QWidget

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

        self.setWindowTitle("自动切换输入字段示例")
        self.setGeometry(100, 100, 300, 200)

        # 创建输入字段
        self.input1 = QLineEdit()
        self.input2 = QLineEdit()
        self.input3 = QLineEdit()

        # 设置事件监听器
        self.input1.textChanged.connect(self.check_input1)
        self.input2.textChanged.connect(self.check_input2)
        self.input3.textChanged.connect(self.check_input3)

        # 创建布局并添加输入字段
        layout = QVBoxLayout()
        layout.addWidget(self.input1)
        layout.addWidget(self.input2)
        layout.addWidget(self.input3)

        # 创建主窗口部件并设置布局
        widget = QWidget()
        widget.setLayout(layout)
        self.setCentralWidget(widget)

    def check_input1(self):
        if len(self.input1.text()) >= 5:
            self.input2.setFocus()

    def check_input2(self):
        if len(self.input2.text()) >= 5:
            self.input3.setFocus()

    def check_input3(self):
        if len(self.input3.text()) >= 5:
            # 如果是最后一个输入字段，可以将焦点设置到提交按钮或其他操作上
            self.input3.clearFocus()

if __name__ == "__main__":
    app = QApplication([])
    window = MainWindow()
    window.show()
    app.exec_()