无法将悬停与 jQuery Tag Cloud 一起使用答案

【问题标题】：Can't use hover with jQuery Tag Cloud无法将悬停与 jQuery Tag Cloud 一起使用
【发布时间】：2013-03-27 20:38:03
【问题描述】：

当人们将鼠标悬停在标签云中的任何项目上时，我需要添加一个 onHover 事件，这是代码。我认为某处存在冲突。现在它根本不会触发。

<html>
    <head>
        <title>jQCloud Example</title>
        <link rel="stylesheet" type="text/css" href="../jqcloud/jqcloud.css" />
        <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.js"></script>
        <script type="text/javascript" src="../jqcloud/jqcloud-1.0.3.js"></script>
        <script type="text/javascript">
            var word_list = [
                {text: "Lorem", weight: 13, link: "https://github.com/DukeLeNoir/jQCloud"},
                {text: "Ipsum", weight: 10.5, html: {title: "My Title", "class": "custom-class"}, link: {href: "http://jquery.com/", target: "_blank"}},
                {text: "Dolor", weight: 9.4},
                {text: "Sit", weight: 8},
                {text: "Amet", weight: 6.2},
                {text: "Consectetur", weight: 5},
                {text: "Adipiscing", weight: 5},
                {text: "Elit", weight: 5},
                {text: "Nam et", weight: 5},
                {text: "Leo", weight: 4},
                {text: "Sapien", weight: 4},
                {text: "Pellentesque", weight: 3},
                {text: "habitant", weight: 3},
                {text: "morbi", weight: 3},
                {text: "tristisque", weight: 3},
                {text: "senectus", weight: 3},
                {text: "et netus", weight: 3},
                {text: "et malesuada", weight: 3},
                {text: "fames", weight: 2},
                {text: "ac turpis", weight: 2},
                {text: "egestas", weight: 2},
                {text: "Aenean", weight: 2},
                {text: "vestibulum", weight: 2},
                {text: "elit", weight: 2},
                {text: "sit amet", weight: 2},
                {text: "metus", weight: 2},
                {text: "adipiscing", weight: 2},
                {text: "ut ultrices", weight: 2},
                {text: "justo", weight: 1},
                {text: "dictum", weight: 1},
                {text: "Ut et leo", weight: 1},
                {text: "metus", weight: 1},
                {text: "at molestie", weight: 1},
                {text: "purus", weight: 1},
                {text: "Curabitur", weight: 1},
                {text: "diam", weight: 1},
                {text: "dui", weight: 1},
                {text: "ullamcorper", weight: 1},
                {text: "id vuluptate ut", weight: 1},
                {text: "mattis", weight: 1},
                {text: "et nulla", weight: 1},
                {text: "Sed", weight: 1}
            ];
            $(function() {
                $("#my_favorite_latin_words").jQCloud(word_list);
                $('span').hover(function() {
                    alert('a');
                });
            });
        </script>
    </head>
    <body>
        <h1>jQCloud Example</h1>
        <div id="my_favorite_latin_words" style="width: 550px; height: 350px; border: 1px solid #ccc;"></div>
    </body>
</html>

【问题讨论】：

标签： jquery tag-cloud

【解决方案1】：

在 jqcloud 完成创建 wordcloud 后，使用 jqcloud 的 afterCloudRender 运行 jquery

$('#example').jQCloud(words,{
    shape : 'rectangle',
    afterCloudRender : function(){
        $('span','#example').each(function(){
            alert($(this).text());
        });
    }
});

【讨论】：

【解决方案2】：

原因

hover 处理程序绑定到页面加载时尚不存在的span 元素。因此，处理程序不会绑定到动态添加的span 元素。

解决方案

而不是直接绑定处理函数，你应该委托它在DOM的更高层到页面加载时存在的父元素。

例如：

$("#my_favorite_latin_words").on('mouseenter', 'span', function() {
    alert('a');
});

【讨论】：