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  • [Jquery] 实现温度计动画效果

    设计图如下:

    1.xhml

    <div id="mometer">
    <div id="hot"></div>
    <span>
    <div id="Hgheader">0</div>
    <div id="Hg"></div>
    </span>
    </div>
    <input name="aa" type="text" value="请输入0-100的数值" id="num"/>
    <input name="" type="button" id="Risk" value="查看度数" />

    2.css

    #num{color:#999;}
    #mometer{position:relative; height:100px;15px;background
    -color:#CCC;margin:50px;}
    span{position:absolute;display:block;bottom:0px;40px;}
    #Hgheader{height:15px;line
    -height:15px;color:#FF0000;font-size:14px;font-family:Arial, Helvetica, sans-serif;
    border
    -bottom:#f00 1px solid;left:-40px;position:relative;}
    #Hg{height:0px; font
    -size:0px;background-color:#C00;15px;}
    #hot{height:100px;15px; background
    -color:#FF0; position:absolute; top:0; left:0;}

     3.js

    $(document).ready(function(){
    $(
    "#hot").fadeTo(0,0);//初始透明度为0;
    $('#num').click(function(){this.select();})
    $(
    '#Risk').click(function(){
    inputvalue
    =$('#num').val();//val()获取input元素的值,另外还可以用attr("value")来获取;
    var inputnum=parseInt(inputvalue);
    if($('#num').val().search("^-?\\d+$") != 0){
    alert(
    "请输入一个0-100的整数!");
    return false;
    }
    else{
    $(
    "#Hgheader").html(inputvalue+"");
    if(inputnum>=100){
    inputnum
    =100;
    $(
    '#num').val(100)
    $(
    "#Hgheader").html(100+"");
    }
    else if(inputnum<=0){
    inputnum
    =0;
    $(
    '#num').val(0)
    $(
    "#Hgheader").html(0+"");
    }
    }
    var Columnhe
    =inputnum/100;
    $(
    "#Hg").animate({height:inputnum},'show');
    $(
    "#hot").fadeTo('slow',Columnhe);
    //在这里把html换成text效果也是一样的;
    });
    });

     将代码一一拷贝到页面相应的位置,然后记得调用jquery框架,展示条件有限,所以效果跟设计图有出入,但实现原理是一样的,欢迎大家多多交流!

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  • 原文地址:https://www.cnblogs.com/fengfan/p/1760368.html
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