<
!doctype html>
<html class="no-js" lang="">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title></title>
<link rel="stylesheet" href="css/style.css">
<link rel="stylesheet" href="css/kuding.css">
<link rel="stylesheet" href="css/product-styles.css">
<meta name="description" content="">
<meta property="og:title" content="">
<meta property="og:type" content="">
<meta property="og:url" content="">
<meta property="og:image" content="">
<meta property="og:image:alt" content="">
<link rel="icon" href="/favicon.ico" sizes="any">
<link rel="icon" href="/icon.svg" type="image/svg+xml">
<link rel="apple-touch-icon" href="icon.png">
<link rel="manifest" href="site.webmanifest">
<meta name="theme-color" content="#fafafa">
</head>
<body>
<script >
// 搜索框点击显示下拉面板
const searchInput = document.getElementById('search-input');
const searchDropdown = document.getElementById('search-dropdown');
const searchContainer = document.querySelector('.search-container');
const resultPage = document.getElementById('result-page');
searchInput.addEventL
istener('focus', () => {
searchDropdown.style.d
isplay = 'block';
});
// 点击页面其他区域隐藏下拉面板
document.addEventL
istener('click', (e) => {
if (
!searchContainer.contains(e.target)) {
searchDropdown.style.d
isplay = 'none';
}
});
// 跳转到搜索结果页面
function goToResult(keyword) {
const resultTitle = document.getElementById('result-title');
resultTitle.textContent = `搜索结果：${keyword}`;
searchContainer.style.d
isplay = 'none';
resultPage.style.d
isplay = 'block';
}
// 返回搜索页面
function goBack() {
resultPage.style.d
isplay = 'none';
searchContainer.style.d
isplay = 'block';
}
// 搜索按钮逻辑
const searchBtn = document.getElementById('search-btn');
searchBtn.addEventL
istener('click', () => {
const keyword = searchInput.value.trim();
if (keyword) {
goToResult(keyword);
// 实际项目中可在此处添加“添加到历史搜索”逻辑
}
});
</script>
<div class="AllDiv">
<
!---顶部菜单栏（固定位置和高度：100px）--->
<div class="TopNavigation">
<div id="toplogo">XianCai</div>
<div class="search-container">
<
!-- 搜索框区域 -->
<div class="search-box">
<input type="text" id="search-input" placeholder="搜索你想要的宝贝...">
<button id="search-btn">搜索</button>
</div>
<
!-- 搜索下拉面板（默认隐藏，点击搜索框显示） -->
<div class="search-dropdown" id="search-dropdown">
<
!-- 历史搜索 -->
<div class="dropdown-section">
<h3 class="section-title">历史搜索</h3>
<ul class="h
istory-l
ist" id="h
istory-l
ist">
<li class="h
istory-item" onclick="goToResult('二手笔记本电脑')">二手笔记本电脑</li>
<li class="h
istory-item" onclick="goToResult('闲置连衣裙')">闲置连衣裙</li>
<li class="h
istory-item" onclick="goToResult('家用咖啡机')">家用咖啡机</li>
<li class="h
istory-item" onclick="goToResult('考研真题')">考研真题</li>
</ul>
</div>
<
!-- 推荐搜索 -->
<div class="dropdown-section">
<h3 class="section-title">大家都在搜</h3>
<ul class="recommend-l
ist" id="recommend-l
ist">
<li class="recommend-item" onclick="goToResult('二手手机')">二手手机</li>
<li class="recommend-item" onclick="goToResult('露营装备')">露营装备</li>
<li class="recommend-item" onclick="goToResult('儿童绘本')">儿童绘本</li>
<li class="recommend-item" onclick="goToResult('厨房小家电')">厨房小家电</li>
</ul>
</div>
</div>
</div>
<
!-- 搜索结果页面（默认隐藏） -->
<div class="result-page" id="result-page" style="d
isplay: none;">
<div class="back-btn" onclick="goBack()">← 返回搜索</div>
<h2 class="result-title" id="result-title">搜索结果：</h2>
<p class="result-tip">点击历史/推荐项后，此处会显示对应关键词的搜索结果（实际项目中需对接后端接口）</p >
</div>
</body>
</html>
本文探讨了在Delphi中使用键盘事件处理函数时遇到的问题，即如何限制输入为字母、数字或汉字。通过修改KeyPress事件处理函数，确保用户只能输入这三类字符。
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