PyQt5 - 访问标签的大小

我们可以使用resize()方法设置标签的大小，并且可以使用adjustSize()方法根据内容调整大小。在本文中，我们将了解如何访问大小。为此，我们将使用size()方法。该方法返回Qsize object ，它是resize()方法的参数。

Syntax : label.size()

Argument : It takes no argument.

Return : It returns the QtCore.Qsize object

编程需要懂一点英语

代码：

# importing the required libraries
  
from PyQt5.QtCore import * 
from PyQt5.QtGui import * 
from PyQt5.QtWidgets import * 
import sys
  
  
class Window(QMainWindow):
    def __init__(self):
        super().__init__()
  
  
        # set the title
        self.setWindowTitle("Python")
  
        # setting geometry
        self.setGeometry(100, 100, 600, 400)
  
        # creating a label widget
        self.label_1 = QLabel("old label ", self)
  
        # setting up the border
        self.label_1.setStyleSheet("border :3px solid black;")
  
        # resizing the label
        self.label_1.resize(150, 40)
  
        # moving the label
        self.label_1.move(100, 100)
  
        # printing the size of old label
        print(self.label_1.size())
  
        # creating a new label widget
        self.label_2 = QLabel("new Label ", self)
  
        # setting up the border
        self.label_2.setStyleSheet("border :3px solid black;")
  
        # moving the label
        self.label_2.move(200, 200)
  
        # resizing the label
        self.label_2.adjustSize()
  
        # printing the size of new label
        print(self.label_2.size())
  
        # show all the widgets
        self.update()
        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：

PyQt5.QtCore.QSize(150, 40)
PyQt5.QtCore.QSize(150, 40)