jQuery实现大屏滚动播放的效果

叁歲伎倆 2022-10-06 00:41 207阅读 0赞

场景需求：  
在大屏幕上，消息会进行一个实时滚动播报的效果，将现有的内容进行一个来回滚动的播放~~

代码：

<!DOCTYPE HTML>
    <html xmlns:th="http://www.thymeleaf.org">
        <head>
            <title>复选框checkbox自定义样式</title>
            <meta name="viewport" content="width=device-width, initial-scale=1">
            <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
            <link rel="stylesheet" href="https://cdn.bootcss.com/twitter-bootstrap/4.3.1/css/bootstrap.min.css">
            <script src="https://cdn.bootcss.com/jquery/3.4.1/jquery.min.js"></script>
            <script src="https://cdn.bootcss.com/twitter-bootstrap/4.3.1/js/bootstrap.min.js"></script>
            <style>
                * {
            margin: 0;
            padding: 0;
        }
        
        .contScend {
            width: 400px;
            height: 200px;
            background: #000000;
            margin: 20px auto;
            overflow: hidden;
        }
        
        .contScend ul {
            list-style: none;
            width: 100%;
            height: 100%;
            color:red;
            font-size: 13px;
        }
        
        .contScend ul li {
            width: 100%;
            height: 40px;
            box-sizing: border-box;
            line-height: 40px;
            text-align: center;
        }
    
            </style>
        </head>
        <body>
            
            <div class="contScend">
    
            </div>
        </body>
        <script type="text/javascript">
            $.ajax({
                url: "test.json",
                type: 'GET',
                dataType: 'json',
                success: function(data) {
                    var html = "";
                    html += '<ul>';
                    $.each(data, function(i, item) { //                
                        html += '<li>' + item.name + ':' + item.numb + '人' + '</li>';
    
                    });
                    html += '</ul>';
                    $(".contScend").html(html);
                    scroll();
                }
            });
    
            function scroll() {
                //获得当前<ul>
                var $uList = $(".contScend ul");
                var timer = null;
                //触摸清空定时器
                $uList.hover(function() {
                        clearInterval(timer);
                    },
                    function() { //离开启动定时器
                        timer = setInterval(function() {
                                scrollList($uList);
                            },
                            1000);
                    }).trigger("mouseleave"); //自动触发触摸事件
                //滚动动画
                function scrollList(obj) {
                    //获得当前<li>的高度
                    var scrollHeight = $("ul li:first").height();
                    //滚动出一个<li>的高度
                    $uList.stop().animate({
                            marginTop: -scrollHeight
                        },
                        600,
                        function() {
                            //动画结束后，将当前<ul>marginTop置为初始值0状态，再将第一个<li>拼接到末尾。
                            $uList.css({
                                marginTop: 0
                            }).find("li:first").appendTo($uList);
                        });
                }
            }
        </script>
    </html>

test.json

[{
        "name": "体验区统计",
        "numb": 0
    }, {
        "name": "test909",
        "numb": 0
    }, {
        "name": "test910",
        "numb": 0
    }, {
        "name": "111",
        "numb": 0
    }, {
        "name": "test",
        "numb": 0
    }, {
        "name": "test11111",
        "numb": 0
    }, {
        "name": "记忆区统计",
        "numb": 0
    }]

效果如下：

![6ec8225e1d7c0b647fdc17031642172e.gif][]

[6ec8225e1d7c0b647fdc17031642172e.gif]: /images/20221005/d0857786f2ac435ba965cf7e79c2e9a2.png