为什么我的鼠标放在图片上它就一直动,放在图片以为的a部分就只动一次?

来源:7-1 JS动画案例

qq_慕瓜2493294

2019-08-05 11:27

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>淘宝案例</title>
    <style>
        #move{
            width: 300px;
            border:1px solid #ccc;
            margin:0 auto;
            padding:10px;
            overflow: hidden;

        }
        #move a{
            display: inline-block;
            width: 58px;
            height: 25px;
            border:1px solid #ddd;
            border-radius: 3px;
            text-align: center;
            margin:10px 17px;
            position: relative;
            padding-top: 40px;
            color: #9c9c9c;
            font-size: 12px;
            text-decoration: none;
            line-height: 25px;
            overflow: hidden;
        }
        #move a i{
            position: absolute;
            top: 10px;
            left: 0;
            display: inline-block;
            width: 100%;
            filter:alpha(opacity=100);
            opacity: 1;
        }
        #move a p{
            margin-top: 0;
        }
        #move a:hover{
            color: #f00;
        }
        #move img {
            width:30px;
            height:30px;
            border:none;
        }
    </style>
    <script src="move.js"></script>
    <script>
        window.onload=function(){
            var omove=document.getElementById("move");
            var as=omove.getElementsByTagName("a");
            for(var i=0;i<as.length;i++){
                as[i].onmouseover=function(){
                    var _this=this.getElementsByTagName("i")[0];
                    startMove(_this,{top:-25,opacity:30},function(){
                        _this.style.top=20+"px";
                        startMove(_this,{top:5,opacity:100});
                    });
                }
            }
        }
    </script>
</head>
<body>
<div id="move">
    <a href="#"><i><img src="image/披萨.png" alt="pisa"/></i><p>披萨</p></a>
    <a href="#"><i><img src="image/棒冰.png" alt="ice"/></i><p>棒冰</p></a>
    <a href="#"><i><img src="image/热狗.png" alt="hotdog"/></i><p>热狗</p></a>
    <a href="#"><i><img src="image/牛油果.png" alt="frult"/></i><p>牛油果</p></a>
    <a href="#"><i><img src="image/甜甜圈.png" alt="pisa"/></i><p>甜甜圈</p></a>
    <a href="#"><i><img src="image/草莓.png" alt="stroyberry"/></i><p>草莓</p></a>

    <!--<a href="#" class="fl"><i><img src="image/蛋糕.png" alt="cake"/></i><p>蛋糕</p></a>
    <a href="#" class="fl"><i><img src="image/饼干.png" alt="cookie"/></i><p>饼干</p></a>
    <a href="#" class="fl"><i><img src="image/马卡龙.png" alt="makalong"/></i><p>马卡龙</p></a>-->
</div>

</body>
</html>


move.js

function getStyle(obj,attr){
    if(obj.currentStyle){
        return obj.currentStyle[attr];
    }else{
        return getComputedStyle(obj,false)[attr];
    }
}
//startMove(obj,{attr1:target1,attr1:target1,attr1:target1…},fn)
function startMove(obj,json,fn){
    //清除定时
    clearInterval(obj.timer);
    //定时器
    obj.timer=setInterval(function () {
        var flag=true;
        for(var attr in json){
            //获取样式
            var icr=0;
            if(attr=="opacity")
            {
                icr=Math.round(parseFloat(getStyle(obj,attr))*100);
            }
            else
            {
                icr=parseInt(getStyle(obj,attr));//注意返回的是有单位的要用parseInt取其数值
            }
            //计算速度
            var speed=(json[attr]-icr)/20;
            speed=speed>0?Math.ceil(speed):Math.floor(speed);
            //检测停止
            if(icr!=json[attr])
            {
                flag=false;
            }
            if(attr=="opacity")
            {
                obj.style.opacity=(icr+speed)/100;
                obj.style.filter="alpha(opacity:"+(icr+speed)+")";
            }
            else
            {
                obj.style[attr]=icr+speed+"px";
            }

        }
        if(flag)
        {
            clearInterval(obj.timer);
            if(fn)
            {
                fn();
            }
        }
    },20);
}


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1回答

  • 半吊子渔者
    2019-08-08 11:45:29

    我也遇见过这种情况,根据我的观察应该和鼠标的位置有关。事件判断的条件是a的mouseover,而a标签里有很多子标签,每个子标签都可以触发a的onmouseover事件。你可以在审查中通过对标签区域的观察来看看究竟是不是这样。。。。至于解决方案,我目前还没改出来

    qq_慕瓜2...

    要是解决了望告知(#^.^#)

    2019-08-10 23:23:26

    共 1 条回复 >

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