PyQt5 – 获取组合框项的最小内容长度 | minimumContentsLength() 方法

在这篇文章中，我们将看到如何获得组合框项目的最小长度，即这个属性持有适合组合框的最小字符数。为了做到这一点，我们将使用setMinimumContentsLength方法，默认情况下，组合框的最小长度为0。

为了获得最小的内容长度，我们将使用minimumContentsLength方法。

语法： combo_box.minimumContentsLength()

参数： 它不需要参数

返回： 它返回整数

以下是实现方法 –

# importing libraries
from PyQt5.QtWidgets import *
from PyQt5 import QtCore, QtGui
from PyQt5.QtGui import *
from PyQt5.QtCore import *
import sys
 
 
class Window(QMainWindow):
 
    def __init__(self):
        super().__init__()
 
        # setting title
        self.setWindowTitle("Python ")
 
        # setting geometry
        self.setGeometry(100, 100, 600, 400)
 
        # calling method
        self.UiComponents()
 
        # showing all the widgets
        self.show()
 
    # method for widgets
    def UiComponents(self):
 
        # creating a combo box widget
        self.combo_box = QComboBox(self)
 
        # setting geometry of combo box
        self.combo_box.setGeometry(200, 150, 150, 30)
 
        # geek list
        geek_list = ["Sayian", "Super Sayian", "Super Sayian 2",
                                              "Super Sayian B"]
 
        # making it editable
        self.combo_box.setEditable(True)
 
        # adding list of items to combo box
        self.combo_box.addItems(geek_list)
 
        # setting minimum content length
        self.combo_box.setMinimumContentsLength(3)
 
        # getting minimum content length
        mini = self.combo_box.minimumContentsLength()
 
        # creating label to show minimum length
        label = QLabel("Minimum length = " + str(mini), self)
 
        # setting geometry of the label
        label.setGeometry(150, 100, 350, 30)
 
 
# create pyqt5 app
App = QApplication(sys.argv)
 
# create the instance of our Window
window = Window()
 
# start the app
sys.exit(App.exec())