pyqt5 combobox

PyQt5中的ComboBox是一种下拉列表框控件，可以显示多个选项供用户选择。可以使用addItem()方法或addItems()方法向ComboBox中添加选项。例如，使用addItem()方法可以单个添加选项，如cb.addItem('C')，cb.addItem('Python')。使用addItems()方法可以添加多个选项，如cb.addItems(['Java','C#','PHP'])。当ComboBox中选项发生改变时，可以通过连接currentIndexChanged信号到自定义的槽函数selectionChange()来处理这个事件，如cb.currentIndexChanged.connect(self.selectionchange)。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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