Framework7 无限滚动
说明
当页面接近底部时，无限滚动允许您加载额外的内容并执行所需的操作。
以下 HTML 布局显示无限滚动-
<div class = "page">
<div class = "page-content infinite-scroll" data-distance = "100">
...
</div>
</div>
上面的布局包含以下类-
page-content 无限滚动-用于无限滚动容器。
data-distance-此属性允许您配置距页面底部的距离（以 px 为单位）以触发无限滚动事件，其默认值为 50px。
如果你想在页面顶部使用无限滚动，你需要添加额外的
"infinite-scroll-top" 类到
"page-content"-
<div class = "page">
<div class = "page-content infinite-scroll infinite-scroll-top">
...
</div>
</div>
无限滚动事件
infinite-当页面滚动到底部指定距离时触发。它将被
div class = "page-content infinite-scroll" 定位。
有两种应用程序的方法可以与无限滚动容器一起使用-
要将无限滚动事件侦听器添加到指定的 HTML 容器，请使用以下方法-
myApp.attachInfiniteScroll(container)
您可以使用以下方法从指定的 HTML 容器中删除无限滚动事件侦听器-
myApp.detachInfiniteScroll(container)
其中
parameters 是用于无限滚动容器的
HTMLElement 或
string 必需选项。
示例
下面的例子演示了当页面滚动到底部时加载附加内容的无限滚动-
<!DOCTYPE html>
<html>
<head>
<meta name = "viewport" content = "width = device-width, initial-scale = 1,
maximum-scale = 1, minimum-scale = 1, user-scalable = no, minimal-ui" />
<meta name="apple-mobile-web-app-capable" content="yes" />
<meta name = "apple-mobile-web-app-status-bar-style" content = "black" />
<title>infinite_scroll</title>
<link rel = "stylesheet"
href = "https://cdnjs.cloudflare.com/ajax/libs/framework7/1.4.2/css/framework7.ios.min.css" />
<link rel = "stylesheet"
href = "https://cdnjs.cloudflare.com/ajax/libs/framework7/1.4.2/css/framework7.ios.colors.min.css" />
</head>
<body>
<div class = "views">
<div class = "view view-main">
<div class = "navbar">
<div class = "navbar-inner">
<div class = "left"> </div>
<div class = "center sliding">Infinite Scroll</div>
<div class = "right"> </div>
</div>
</div>
<div class = "pages navbar-through">
<div data-page = "home" class = "page">
<div class = "page-content infinite-scroll">
<div class = "list-block">
<ul>
<li class = "item-content">
<div class = "item-inner">
<div class = "item-title">Item 1</div>
</div>
</li>
<li class = "item-content">
<div class = "item-inner">
<div class = "item-title">Item 2</div>
</div>
</li>
<li class = "item-content">
<div class = "item-inner">
<div class = "item-title">Item 3</div>
</div>
</li>
<li class = "item-content">
<div class = "item-inner">
<div class = "item-title">Item 4</div>
</div>
</li>
<li class = "item-content">
<div class = "item-inner">
<div class = "item-title">Item 5</div>
</div>
</li>
<li class = "item-content">
<div class = "item-inner">
<div class = "item-title">Item 6</div>
</div>
</li>
<li class = "item-content">
<div class = "item-inner">
<div class = "item-title">Item 7</div>
</div>
</li>
<li class = "item-content">
<div class = "item-inner">
<div class = "item-title">Item 8</div>
</div>
</li>
<li class = "item-content">
<div class = "item-inner">
<div class = "item-title">Item 9</div>
</div>
</li>
<li class = "item-content">
<div class = "item-inner">
<div class = "item-title">Item 10</div>
</div>
</li>
<li class = "item-content">
<div class = "item-inner">
<div class = "item-title">Item 11</div>
</div>
</li>
<li class = "item-content">
<div class = "item-inner">
<div class = "item-title">Item 12</div>
</div>
</li>
<li class = "item-content">
<div class = "item-inner">
<div class = "item-title">Item 13</div>
</div>
</li>
<li class = "item-content">
<div class = "item-inner">
<div class = "item-title">Item 14</div>
</div>
</li>
<li class = "item-content">
<div class = "item-inner">
<div class = "item-title">Item 15</div>
</div>
</li>
<li class = "item-content">
<div class = "item-inner">
<div class = "item-title">Item 16</div>
</div>
</li>
<li class = "item-content">
<div class = "item-inner">
<div class = "item-title">Item 17</div>
</div>
</li>
<li class = "item-content">
<div class = "item-inner">
<div class = "item-title">Item 18</div>
</div>
</li>
<li class = "item-content">
<div class = "item-inner">
<div class = "item-title">Item 19</div>
</div>
</li>
<li class = "item-content">
<div class = "item-inner">
<div class = "item-title">Item 20</div>
</div>
</li>
</ul>
</div>
<div class = "infinite-scroll-preloader">
<div class = "preloader"></div>
</div>
</div>
</div>
</div>
</div>
</div>
<script type = "text/javascript"
src = "https://cdnjs.cloudflare.com/ajax/libs/framework7/1.4.2/js/framework7.min.js"></script>
<style>
.infinite-scroll-preloader {
margin-top:-20px;
margin-bottom:10px;
text-align:center;
}
.infinite-scroll-preloader .preloader {
width:34px;
height:34px;
}
</style>
<script>
var myApp = new Framework7();
var $ = Dom7;
// Loading flag
var loading = false;
// Last loaded index
var lastIndex = $('.list-block li').length;
// Max items to load
var maxItems = 60;
// Append items per load
var itemsPerLoad = 20;
// Attach 'infinite' event handler
$('.infinite-scroll').on('infinite', function () {
// Exit, if loading in progress
if (loading) return;
// Set loading flag
loading = true;
// Emulate 1s loading
setTimeout(function () {
// Reset loading flag
loading = false;
if (lastIndex >= maxItems) {
// Nothing more to load, detach infinite scroll events to prevent unnecessary loadings
myApp.detachInfiniteScroll($('.infinite-scroll'));
// Remove preloader
$('.infinite-scroll-preloader').remove();
return;
}
// Generate new items HTML
var html = '';
for (var i = lastIndex + 1; i <= lastIndex + itemsPerLoad; i++) {
html += '<li class = "item-content">
<div class = "item-inner">
<div class = "item-title">
Item ' + i + '
</div>
</div>
</li>';
}
// Append new items
$('.list-block ul').append(html);
// Update last loaded index
lastIndex = $('.list-block li').length;
}, 1000);
});
</script>
</body>
</html>
输出
让我们执行以下步骤来看看上面给出的代码是如何工作的-
将上述给定的 HTML 代码保存为服务器根文件夹中的 infinite_scroll.html 文件。
将此 HTML 文件打开为 http://localhost/infinite_scroll.html，输出如下所示。
该示例允许在页面滚动到底部的指定距离时加载其他内容。
