用jQuery写的轮播图

 效果图:

  

GitHub地址:https://github.com/123456abcdefg/Javascript

大家可以下载源码查看。

与前一篇写的轮播图实现的效果一致,这个是用jQuery写的,相对简单一点的吧。

js代码:

    <script src="../jquery-3.3.1.min.js"></script>
    <script>
        var index = 1;
        var newLeft = 0;
        var interval;
        var buttSpan = $(".butt").children();
        function nextPage(next){
            $(buttSpan[index-1]).removeClass("on");
            if(next){
                if(index == 5){
                    index = 1;
                    newLeft = 0;
                }
                else{
                    index ++;
                    newLeft = -600*(index-1);
                }
            }
            else{
                if(index == 1){
                    index = 5;
                    newLeft = -2400;
                }
                else{
                    index --;
                    newLeft = -600*(index-1);
                }
            }
            $(".list").css("left",newLeft + 'px');
            $(buttSpan[index-1]).addClass("on");
        }
        function autoNextPage(){
            interval = setInterval(function(){
                nextPage(true);
            },"3000");
        }
        autoNextPage();
    
        $(".container").mouseover(function(){
            clearInterval(interval);
            $(".arrow").css("display","block");
        });
        $(".container").mouseout(function(){
            autoNextPage();
            $(".arrow").css("display","none");
        });
    
        $(".left").click(function(){
            nextPage(false);
        });
        $(".right").click(function(){
            nextPage(true);
        });
    
        function clickButt(){
            for(var i = 0;i<5;i++){
                $(buttSpan[i]).click(function(){
                    $(buttSpan[index-1]).removeClass("on");
                    index = $(this).attr("index")-1;
                    nextPage(true);
                });
            }
        }
        clickButt();
    
    </script>

  

主要包括一下几个部分:

1.一个轮播的方法(left):nextPage(next);

index , newLeft , left 

2.自动轮播:autoNextPage();

3.鼠标放到container上图片及按钮不再播放

4.鼠标点击左右方向,可以向左/向右轮播。(调用nextPage()方法)

5.点击下面几个按钮,可以切换到相应的图片(index),并且按钮样式也相应改变。

 

这个是相对于上面较简单的另一种写法:

点击相应的按钮,按钮样式改变,其同胞元素恢复之前。

获取到当前index值,调用play(true)方法,按钮对应的图片改变。

 

完整代码:

<html>
<head>
<meta charset="utf-8" />
<title>1</title>
<style>
    *{
        padding:0;
        margin:0;
    }
    .container{
        width:600px;
        height:400px;
        overflow:hidden;
        position:relative;
        margin:0 auto;
    }
    .list{
        width:3000px;
        height:400px;
        position:absolute;
        
    }
    .list img{
        width:600px;
        height:400px;
        float:left;
    }
    .butt{
        width:300px;
        height:20px;
        position:absolute;
        left:230px;
        bottom:20px;
        cursor:pointer;
    }
    .butt span{
        width:20px;
        height:20px;
        display:inline-block;
        border:1px solid brown;
        border-radius:50%;
        color:brown;
        z-index:1;
        font-size:20px;
        font-weight:bold;
        text-align:center;
    }
    .arrow{
        width:30px;
        height:30px;
        position:absolute;
        top:200px;
        color:black;
        background-color:white;
        z-index:1;
        font-size:30px;
        font-weight:bold;
        text-align:center;
        text-decoration:none;
        display:none;
    }
    .left{
        left:10px;
    }
    .right{
        right:10px;
    }
    .on{
        background-color:black;
    }
    
</style>
</head>

<body>
    <div class="container">
        <div class="list" style="left:0px;">
            <img src="../img/1.jpg"></img>
            <img src="../img/2.jpg"></img>
            <img src="../img/3.jpg"></img>
            <img src="../img/4.jpg"></img>
            <img src="../img/5.jpg"></img>
        </div>
        
        <div class="butt">
            <span index="1" class="on">1</span>
            <span index="2">2</span>
            <span index="3">3</span>
            <span index="4">4</span>
            <span index="5">5</span>
        </div>
        
        <a href="#" class="arrow left">&lt;</a>
        <a href="#" class="arrow right">&gt;</a>
        
    </div>
    
    <script src="../jquery-3.3.1.min.js"></script>
    <script>
        var index = 1;
        var newLeft = 0;
        var interval;
        var buttSpan = $(".butt").children();
        function nextPage(next){
            $(buttSpan[index-1]).removeClass("on");
            if(next){
                if(index == 5){
                    index = 1;
                    newLeft = 0;
                }
                else{
                    index ++;
                    newLeft = -600*(index-1);
                }
            }
            else{
                if(index == 1){
                    index = 5;
                    newLeft = -2400;
                }
                else{
                    index --;
                    newLeft = -600*(index-1);
                }
            
            }
            $(".list").css("left",newLeft + 'px');
            $(buttSpan[index-1]).addClass("on");
        }
        function autoNextPage(){
            interval = setInterval(function(){
                nextPage(true);
            },"3000");
        }
        autoNextPage();
    
        $(".container").mouseover(function(){
            clearInterval(interval);
            $(".arrow").css("display","block");
        });
        $(".container").mouseout(function(){
            autoNextPage();
            $(".arrow").css("display","none");
        });
    
        $(".left").click(function(){
        
            nextPage(false);
        });
        $(".right").click(function(){
        
            nextPage(true);
        });
    
        function clickButt(){
            
            for(var i = 0;i<5;i++){
                $(buttSpan[i]).click(function(){
                    $(buttSpan[index-1]).removeClass("on");
                    index = $(this).attr("index")-1;
                    nextPage(true);
                });
            }
        }
        clickButt();
    
    </script>
    
    
</body>

</html>
View Code

 

参考博客:https://www.cnblogs.com/lihuijuan/p/9486051.html

posted @ 2018-10-23 11:34  苏小落  阅读(1840)  评论(0编辑  收藏  举报