Pysied6 ComboBox

Pyside6的ComboBox下拉列表框，可以给用户提供一系列的选项，下面就来简单了解一下Pysied6 ComboBox的使用。更多关于ComboBox的使用可以参考下面的文档。

https://doc.qt.io/qtforpython-6/PySide6/QtWidgets/QComboBox.html

Pysied6 ComboBox

ComboBox常用函数

ComboBox常用信号

例程

ComboBox添加选项

ComboBox添加选项有两种方式，分别是程序设置和界面设置

程序设置

  self.ui.comboBox.addItem("苹果") # 添加单个选项
  self.ui.comboBox.addItems(["葡萄","香蕉","西瓜"]) # 添加多个选项
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界面设置

打开designer软件，双击ComboBox控件，通过"+ -"符号添加和删除选项。

返回选项信息

print(self.ui.comboBox.currentIndex()) # 打印出当前的选项
print(self.ui.comboBox.currentText())  # 打印出当前选项的文本
print(self.ui.comboBox.count())        # 打印出下拉列表框的选项个数
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添加删除选项

def additem_func(self):
        self.ui.comboBox.insertItem(0,str(datetime.now())) # 添加单个选项,并设置在index为0的位置
        self.ui.comboBox.setCurrentIndex(0)                # 显示index为0的选项
def deleteitem_func(self):
        self.ui.comboBox.removeItem(self.ui.comboBox.currentIndex()) # 移除选项
def combobox_index_change_func(self,index):
        print(self.ui.comboBox.currentText(),index) # 打印出选中的选项文本
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完整程序

界面程序

<ui version="4.0">
 <class>MainWindowclass>
 <widget class="QMainWindow" name="MainWindow">
  <property name="geometry">
   <rect>
    <x>0x>
    <y>0y>
    <width>386width>
    <height>283height>
   rect>
  property>
  <property name="windowTitle">
   <string>MainWindowstring>
  property>
  <widget class="QWidget" name="centralwidget">
   <layout class="QVBoxLayout" name="verticalLayout_2">
    <item>
     <layout class="QVBoxLayout" name="verticalLayout">
      <property name="leftMargin">
       <number>50number>
      property>
      <item>
       <widget class="QComboBox" name="comboBox">
        <property name="sizePolicy">
         <sizepolicy hsizetype="Preferred" vsizetype="Fixed">
          <horstretch>98horstretch>
          <verstretch>0verstretch>
         sizepolicy>
        property>
        <property name="maximumSize">
         <size>
          <width>250width>
          <height>20height>
         size>
        property>
        <property name="sizeIncrement">
         <size>
          <width>98width>
          <height>100height>
         size>
        property>
        <property name="baseSize">
         <size>
          <width>100width>
          <height>0height>
         size>
        property>
       widget>
      item>
     layout>
    item>
    <item>
     <layout class="QHBoxLayout" name="horizontalLayout">
      <item>
       <widget class="QPushButton" name="deleteitem_btn">
        <property name="maximumSize">
         <size>
          <width>100width>
          <height>16777215height>
         size>
        property>
        <property name="text">
         <string>删除选项string>
        property>
       widget>
      item>
      <item>
       <widget class="QPushButton" name="additem_btn">
        <property name="maximumSize">
         <size>
          <width>100width>
          <height>16777215height>
         size>
        property>
        <property name="text">
         <string>增加选项string>
        property>
       widget>
      item>
     layout>
    item>
   layout>
  widget>
  <widget class="QMenuBar" name="menubar">
   <property name="geometry">
    <rect>
     <x>0x>
     <y>0y>
     <width>386width>
     <height>22height>
    rect>
   property>
  widget>
  <widget class="QStatusBar" name="statusbar"/>
 widget>
 <resources/>
 <connections/>
ui>

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主程序

# Import Qt libraries
from PySide6.QtWidgets import *
from PySide6.QtCore import QFile
# Import UI developed in Qt Creator
from combobox_ui import Ui_MainWindow  # 导入界面
# Import PseudoSensor
# Import system tools and datetime
import sys
import statistics
import time
from datetime import datetime

# Create and start the Qt application
class MainWindow(QMainWindow):
    def __init__(self):
        super(MainWindow, self).__init__()
        
        # 设置界面为用户设计的界面
        self.ui = Ui_MainWindow() 
        self.ui.setupUi(self) 

        self.ui.comboBox.addItem("苹果") # 添加单个选项
        self.ui.comboBox.addItems(["葡萄","香蕉","西瓜"]) # 添加多个选项



        print(self.ui.comboBox.currentIndex()) # 打印出当前的选项
        print(self.ui.comboBox.currentText())  # 打印出当前选项的文本
        print(self.ui.comboBox.count())        # 打印出下拉列表框的选项个数
      

        self.ui.comboBox.currentIndexChanged.connect(self.combobox_index_change_func)

        self.ui.additem_btn.clicked.connect(self.additem_func)
        self.ui.deleteitem_btn.clicked.connect(self.deleteitem_func)

    def additem_func(self):
        self.ui.comboBox.insertItem(0,str(datetime.now())) # 添加单个选项,并设置在index为0的位置
        self.ui.comboBox.setCurrentIndex(0)                # 显示index为0的选项

    def deleteitem_func(self):
        self.ui.comboBox.removeItem(self.ui.comboBox.currentIndex()) # 移除选项

    def combobox_index_change_func(self,index):
        print(self.ui.comboBox.currentText(),index) # 打印出选中的选项文本

       
    def closeAndExit(self):
        sys.exit()

if __name__ == "__main__":
    app = QApplication(sys.argv) # 初始化QApplication

    # 初始化界面并显示界面
    window = MainWindow() 
    window.show() 
    window.setFixedSize(window.width(), window.height())
    sys.exit(app.exec())
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