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FormLayout控件表示表单布局，它的基类是QFormLayout，该控件以表单方式进行布局。

表单是一种网页中常见的与用户交互的方式，其主要由两列组成，第一列用来显示信息，给用户提示，而第二列需要用户进行输入或者选择

QFormLayout常用方法：

方法	说明
addRow()	添加行
insertRow()	插入行
removeRow()	删除行
getWidgetPosition()	获取控件位置
getLayoutPosition()	获取容器管理器位置
rowCount()	获取行的总个数
setLayout()	设置布局管理器的位置
setWidget()	修改控件位置
takeRow()	移除行但并不删除子控件
labelForField()	标签操作
setRowWrapPolicy()	设置行的包装策略
rowWrapPolicy()	获取行的包装策略
setFormAlignment()	对其方式，对整个表单进行设置
setLabelAlignment()	对其方式，对标签(左侧区域)进行设置
formAlignment()	对其方式，获取整个表单的对齐方式
labelAlignment()	对其方式，获取标签布局标签(左侧)侧的对齐方式
setFieldGrowthPolicy()	设置字段增长策略
fieldGrowthPolicy()	获取字段增长策略

UI生成参考代码：

from PyQt6 import QtCore, QtGui, QtWidgetsclass Ui_Form(object):def setupUi(self, Form):Form.setObjectName("Form")Form.resize(649, 520)self.formLayoutWidget = QtWidgets.QWidget(parent=Form)self.formLayoutWidget.setGeometry(QtCore.QRect(110, 60, 471, 371))self.formLayoutWidget.setObjectName("formLayoutWidget")self.formLayout = QtWidgets.QFormLayout(self.formLayoutWidget)self.formLayout.setLabelAlignment(QtCore.Qt.AlignmentFlag.AlignRight|QtCore.Qt.AlignmentFlag.AlignTrailing|QtCore.Qt.AlignmentFlag.AlignVCenter)self.formLayout.setFormAlignment(QtCore.Qt.AlignmentFlag.AlignLeading|QtCore.Qt.AlignmentFlag.AlignLeft|QtCore.Qt.AlignmentFlag.AlignTop)self.formLayout.setContentsMargins(20, 50, 20, 0)self.formLayout.setHorizontalSpacing(20)self.formLayout.setVerticalSpacing(30)self.formLayout.setObjectName("formLayout")self.label = QtWidgets.QLabel(parent=self.formLayoutWidget)self.label.setAlignment(QtCore.Qt.AlignmentFlag.AlignCenter)self.label.setObjectName("label")self.formLayout.setWidget(0, QtWidgets.QFormLayout.ItemRole.SpanningRole, self.label)self.label_2 = QtWidgets.QLabel(parent=self.formLayoutWidget)self.label_2.setObjectName("label_2")self.formLayout.setWidget(1, QtWidgets.QFormLayout.ItemRole.LabelRole, self.label_2)self.lineEdit = QtWidgets.QLineEdit(parent=self.formLayoutWidget)self.lineEdit.setObjectName("lineEdit")self.formLayout.setWidget(1, QtWidgets.QFormLayout.ItemRole.FieldRole, self.lineEdit)self.label_3 = QtWidgets.QLabel(parent=self.formLayoutWidget)self.label_3.setObjectName("label_3")self.formLayout.setWidget(2, QtWidgets.QFormLayout.ItemRole.LabelRole, self.label_3)self.lineEdit_2 = QtWidgets.QLineEdit(parent=self.formLayoutWidget)self.lineEdit_2.setObjectName("lineEdit_2")self.formLayout.setWidget(2, QtWidgets.QFormLayout.ItemRole.FieldRole, self.lineEdit_2)self.label_4 = QtWidgets.QLabel(parent=self.formLayoutWidget)self.label_4.setObjectName("label_4")self.formLayout.setWidget(3, QtWidgets.QFormLayout.ItemRole.LabelRole, self.label_4)self.lineEdit_3 = QtWidgets.QLineEdit(parent=self.formLayoutWidget)self.lineEdit_3.setObjectName("lineEdit_3")self.formLayout.setWidget(3, QtWidgets.QFormLayout.ItemRole.FieldRole, self.lineEdit_3)self.pushButton = QtWidgets.QPushButton(parent=self.formLayoutWidget)self.pushButton.setObjectName("pushButton")self.formLayout.setWidget(4, QtWidgets.QFormLayout.ItemRole.FieldRole, self.pushButton)self.retranslateUi(Form)QtCore.QMetaObject.connectSlotsByName(Form)def retranslateUi(self, Form):_translate = QtCore.QCoreApplication.translateForm.setWindowTitle(_translate("Form", "Form"))self.label.setText(_translate("Form", "用户注册"))self.label_2.setText(_translate("Form", "用户名："))self.label_3.setText(_translate("Form", "密码："))self.label_4.setText(_translate("Form", "确认密码："))self.pushButton.setText(_translate("Form", "注册"))