[PyQt6] PartⅡ. Working with QComboBox Class

QComboBox

完整代码

from PyQt6.QtWidgets import QApplication, QWidget, QComboBox, QLabel, QHBoxLayout, QVBoxLayout
from PyQt6.QtGui import QIcon, QFont
import sys

class Window(QWidget):
    def __init__(self):
        super().__init__()

        self.setGeometry(200, 200, 700, 400) # 设置窗口大小
        self.setWindowTitle("Python QComboBox")
        self.setWindowIcon(QIcon('python.png')) # 设置图片，没有的话不显示

        self.create_combo()

    def create_combo(self):
        hbox = QHBoxLayout()

        label = QLabel("Select Account Type: ")
        label.setFont(QFont("Times", 15))

        self.combo = QComboBox()
        self.combo.addItem("Current Account")
        self.combo.addItem("Deposte Account")
        self.combo.addItem("Saving Account")
        self.combo.currentTextChanged.connect(self.combo_changed) # 当文本改变时，调用方法

        vbox = QVBoxLayout()
        self.label_result = QLabel("")
        self.label_result.setFont(QFont("Times", 15))
        vbox.addWidget(self.label_result)

        hbox.addWidget(label)
        hbox.addWidget(self.combo)

        vbox.addLayout(hbox)
        self.setLayout(vbox)

    def combo_changed(self):
        item = self.combo.currentText()
        self.label_result.setText(f"Your Account Type is: {item}")

app = QApplication(sys.argv)
window = Window()
window.show()
sys.exit(app.exec())

程序截图

用designer设计

关键代码

        self.combo.currentTextChanged.connect(self.ComboChanged) # 当前combo中，如果currentText发生改变，就传递一个signal，到ComboChanged这个slots里

完整代码

import sys
from PyQt6.QtWidgets import QApplication, QWidget, QLabel, QComboBox
from PyQt6 import uic


class UI(QWidget):
    def __init__(self):
        super().__init__()

        uic.loadUi("ComboDemo.ui", self)

        self.label_result = self.findChild(QLabel, "label_result")

        self.combo = self.findChild(QComboBox, "comboBox")

        self.combo.currentTextChanged.connect(self.ComboChanged)

    def ComboChanged(self):
        item = self.combo.currentText()
        self.label_result.setText("Your favourite Language: " + item)

app = QApplication(sys.argv)
window = UI()
window.show()
app.exec()

程序截图