import sys

from PySide2.QtWidgets import *

from PySide2.QtGui import QFont

from PySide2 import QtCore

font = QFont()

font.setPointSize(20)

class NewButton(QPushButton):

    def __init__(self, *args):

        super().__init__(*args)

        self.setFont(font)

class Form(QDialog):

    def __init__(self, parent=None):

        super(Form, self).__init__(parent)

        self.v1 = QVBoxLayout()

        self.v2 = QVBoxLayout()

        self.v2.b1 = NewButton("按钮1")

        self.v2.b2 = NewButton("按钮2")

        self.v2.b1.clicked.connect(self.additem)

        self.v2.addWidget(self.v2.b1)

        self.v2.addWidget(self.v2.b2)

        self.additem()

        w = QWidget()

        w.setLayout(self.v1)

        area = QScrollArea()

        area.setWidget(w)

        # area.setLayout(self.v1)

        area.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOn)

        # area.setHorizontalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOn)

        area.setWidgetResizable(True)

        layout = QHBoxLayout()

        layout.addWidget(area)

        # layout.addLayout(self.v1)

        layout.addLayout(self.v2)

        self.setLayout(layout)

    def additem(self):

        self.v1.addWidget(NewButton("新的按钮"))

if __name__ == '__main__':

    app = QApplication(sys.argv)

    form = Form()

    form.show()

    sys.exit(app.exec_())