博客

# -*- coding:utf-8 -*-
"""
@Time:2022/3/24 0:06
@Author:小柠檬
@File:combo_box.py
"""
from PyQt5 import uic, QtCore
from PyQt5.QtWidgets import QApplication


class ComboBox:

    def __init__(self):
        # 加载UI界面
        self.ui = uic.loadUi("combo_box.ui")

        # 1.添加一个下拉选项
        self.ui.comboBox.addItem('小柠檬1')

        # 2.从列表中添加多个下拉选项
        add_list = ['小柠檬2', '小柠檬3', '小柠檬4', '小柠檬5']
        self.ui.comboBox.addItems(add_list)

        # 3.清空所有下拉选项
        # self.ui.comboBox.clear()

        # 4.获取下拉选项数目
        option_count = self.ui.comboBox.count()
        print(option_count)

        # 5.获取当前选中的文本
        option_text = self.ui.comboBox.currentText()
        print(option_text)

        # 6.通过索引获取文本
        option_text_index = self.ui.comboBox.itemText(2)
        print(option_text_index)

        # 7.获取当前选中项的索引
        option_index = self.ui.comboBox.currentIndex()
        print(option_index)

        # 8.通过改变指定索引中的文本内容
        self.ui.comboBox.setItemText(1, '小柠檬改')

        # 9.修改选项发出信号
        self.ui.comboBox.currentIndexChanged.connect(self.slot_combo_box)

    def slot_combo_box(self):
        option_text = self.ui.comboBox.currentText()
        print(f'当前选项:{option_text}')


def main():
    QtCore.QCoreApplication.setAttribute(QtCore.Qt.AA_EnableHighDpiScaling)  # 和designer设计的窗口比例一致
    app = QApplication([])
    combo_box = ComboBox()
    combo_box.ui.show()
    app.exec_()


if __name__ == '__main__':
    main()