PyQt5 中的 Qt 对齐

在 PyQt5 中，Qt 对齐用于设置小部件的对齐方式。为了使用 Qt 对齐方法，我们必须从 QtCore 类中导入 Qt。

from PyQt5.QtCore import Qt

There are many methods in Qt alignment :
1. Qt.AlignLeft
2. Qt.AlignRight
3. Qt.AlignBottom
4. Qt.AlignTop
5. Qt.AlignCenter
6. Qt.AlignHCenter
7. Qt.AlignVCenter

编程需要懂一点英语

注意：还有一些对齐方法，如 Qt.AlignJustify，但它们在 PyQt4 中有效，在 PyQt5 中无效。代码：
该代码将显示所有这些方法，并有助于更好地理解差异。

Python3

# importing the required libraries
 
from PyQt5.QtWidgets import *
from PyQt5.QtCore import Qt
from PyQt5.QtGui import *
import sys
 
class Window(QMainWindow):
    def __init__(self):
        super().__init__()
 
        # set the title
        self.setWindowTitle("Label")
 
        # setting  the geometry of window
        self.setGeometry(0, 0, 650, 400)
 
        # creating a label widget and setting properties
        self.label_1 = QLabel("Bottom", self)
        self.label_1.move(20, 100)
        self.label_1.resize(60, 60)
        self.label_1.setStyleSheet("border: 1px solid black;")
 
        # aligning label to the bottom
        self.label_1.setAlignment(Qt.AlignBottom)
 
        # creating a label widget and setting properties
        self.label_2 = QLabel("Center", self)
        self.label_2.move(90, 100)
        self.label_2.resize(60, 60)
        self.label_2.setStyleSheet("border: 1px solid black;")
 
        # aligning label to the center
        self.label_2.setAlignment(Qt.AlignCenter)
 
        # creating a label widget and setting properties
        self.label_3 = QLabel("Left", self)
        self.label_3.move(160, 100)
        self.label_3.resize(60, 60)
        self.label_3.setStyleSheet("border: 1px solid black;")
 
        # aligning label to the left
        self.label_3.setAlignment(Qt.AlignLeft)
 
        # creating a label widget and setting properties
        self.label_4 = QLabel("Right", self)
        self.label_4.move(230, 100)
        self.label_4.resize(60, 60)
        self.label_4.setStyleSheet("border: 1px solid black;")
 
        # aligning label to the right
        self.label_4.setAlignment(Qt.AlignRight)
 
        # creating a label widget and setting properties
        self.label_5 = QLabel("Top", self)
        self.label_5.move(300, 100)
        self.label_5.resize(60, 60)
        self.label_5.setStyleSheet("border: 1px solid black;")
 
        # aligning label to the top
        self.label_5.setAlignment(Qt.AlignTop)
 
        # creating a label widget and setting properties
        self.label_6 = QLabel("H center", self)
        self.label_6.move(370, 100)
        self.label_6.resize(60, 60)
        self.label_6.setStyleSheet("border: 1px solid black;")
 
        # aligning label to the Hcenter
        self.label_6.setAlignment(Qt.AlignHCenter)
 
        # creating a label widget and setting properties
        self.label_7 = QLabel("V center", self)
        self.label_7.move(440, 100)
        self.label_7.resize(60, 60)
        self.label_7.setStyleSheet("border: 1px solid black;")
 
        # aligning label to the Vcenter
        self.label_7.setAlignment(Qt.AlignVCenter)
 
        # show all the widgets
        self.show()
 
 
# create pyqt5 app
App = QApplication(sys.argv)
 
# create the instance of our Window
window = Window()
 
# start the app
sys.exit(App.exec())

输出：

qt-alignment-pyqt5