如何在pyqt5中调整垂直框布局中添加的小部件的几何形状

Question

我创建了一个pyqt5 窗口，它有一个vertical 布局。在这个垂直布局中，我添加了 2 个按钮。默认情况下，它们垂直对齐，如下所示：

如何调整按钮的几何形状以在上方移动。预期输出如下：

所以如果我添加第三个按钮，它会在按钮 2 下方。下面是代码：

import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QVBoxLayout, QWidget, QPushButton


class MainWindow(QMainWindow):

    def __init__(self, *args, **kwargs):
        super(MainWindow, self).__init__(*args, **kwargs)

        layout = QVBoxLayout()
        widget = QWidget()
        widget.setLayout(layout)
        self.setCentralWidget(widget)

        button1 = QPushButton('Button 1', self)
        layout.addWidget(button1)

        button2 = QPushButton('Button 2', self)
        layout.addWidget(button2)


app = QApplication(sys.argv)
main_window = MainWindow()
main_window.show()
sys.exit(app.exec_())

Answer 1

您需要设置布局的对齐方式并在添加的小部件之间添加一些间距，如下所示：

import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QVBoxLayout, QWidget, QPushButton
from PyQt5 import QtCore


class MainWindow(QMainWindow):

    def __init__(self, *args, **kwargs):
        super(MainWindow, self).__init__(*args, **kwargs)

        layout = QVBoxLayout()
        #set spacing between your widgets
        layout.setSpacing(5)
        #set alignment in your vertical layout
        layout.setAlignment(QtCore.Qt.AlignTop)
        widget = QWidget()
        widget.setLayout(layout)

        self.setCentralWidget(widget)

        button1 = QPushButton('Button 1', self)
        layout.addWidget(button1)

        button2 = QPushButton('Button 2', self)
        layout.addWidget(button2)


app = QApplication(sys.argv)
main_window = MainWindow()
main_window.show()
sys.exit(app.exec_())