写一个图片轮播效果的Demo(自动播放)附代码

2021-06-27 18:59:12
<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>js图片轮播切换</title>
    <style type="text/css">
        .imgCon {
            width: 450px;
            height: 300px;
            border: 2px solid #DCDCDC;
            margin: 100px auto;
            position: relative;
        }

        .imgCon span {
            display: block;
            position: absolute;
            left: 0;
            width: 100%;
            height: 30px;
            background: #808080;
            text-align: center;
            font-size: 18px;
            line-height: 30px;
        }

        .numStyle {
            top: 0;
        }

        .textStyle {
            bottom: 0;
        }

        .imgCon strong {
            font-size: 30px;
            color: #000000;
            position: absolute;
            top: 50%;
            display: block;
            background: gray;
            cursor: pointer;
        }

        .imgCon .prev {
            left: 10px;
        }

        .imgCon .next {
            left: 425px;
        }

        img {
            width: 450px;
            height: 300px;
        }
    </style>
</head>
<body>
　　
<div class="imgCon">
    　　　　<span id="numCon" class="numStyle">加载中...</span>
    　　　　<span id="textCon" class="textStyle">加载中...</span>
    　　　　<strong id="prev" class="prev"><</strong>
    　　　　<strong id="next" class="next">></strong>
    　　　　<img src="" id="imgChange" class="imgChange"/>
</div>
<script language="JavaScript" src="jquery-2.2.3.js"></script>
<script type="text/javascript">
    $(document).ready(function () {
        var numCon = document.getElementById('numCon');
        var textCon = document.getElementById('textCon');
        var imgChange = document.getElementById('imgChange');
        var imgArr = ['img/ad1.jpg', 'img/ad2.jpg', 'img/ad3.jpg', 'img/ad4.jpg'];
        var imgText = ['第一张', '第二张', '第三张', '第四张'];
        var num = 0;
        //数字 图片变化函数
        function imgTab() {
            numCon.innerHTML = num + 1 + '/' + imgArr.length; //数字变化
            textCon.innerHTML = imgText[num]; //底部文字内容变化
            imgChange.src = imgArr[num]; //图片变化
        }

        function nextPage() {
            num++;
            if (num == imgArr.length) {
                num = 0;
            }
            imgTab();
        }

        var t;
        t = window.setInterval(nextPage, 1000);
        $("html").click(function (e) {
            //alert(e.target);
            if (e.target == $("#prev")[0]) {
                window.clearInterval(t);
                num--;
                if (num == -1) {
                    num = imgArr.length - 1;
                }
                imgTab();
                t = window.setInterval(nextPage, 1000);
            }
            else if (e.target == $("#next")[0]) {
                window.clearInterval(t);
                num++;
                if (num == imgArr.length) {
                    num = 0;
                }
                imgTab();
                t = window.setInterval(nextPage, 1000);
            }
        });
    });
</script>
</body>
</html>
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