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我正在尝试开发一个 12 按钮透视键盘,它将在下拉列表中搜索其中的值。单击按钮时,我已经让系统更新下拉列表的 searchParam,但它没有将该值输入到下拉列表文本字段中。我对点火很陌生,我觉得有一个简单的解决方案,但我就是想不通。