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请问.each()这样用对么？问题出在哪儿？

<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
        <title>挑战题</title>
        <script src="http://libs.baidu.com/jquery/1.9.0/jquery.js" type="text/javascript"></script>
    </head>
    <body>
    <button id="btn">读取</button>
    <ul></ul>
    <script type="text/javascript">
    $(function(){
        var jsonInfo=[
            {"name":"张1","score":"60"},
            {"name":"张2","score":"70"},
            {"name":"张3","score":"80"},
            {"name":"张4","score":"90"},
            ];
        $("#btn").bind("click",function(){ 
            jsonInfo.each(function(i){
                if(i=2){
                  $("ul").append("<li>姓名："+jsonInfo[i].name+"&nbsp;分数："+jsonInfo[i].score+"</br></li>");  
                }   
            });
        });  
    });
        
    </script>    
    </body>
</html>

Sharron

2016-06-26

源自：jQuery基础课程 8-11

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2 回答

忐自回答被采纳 +3 积分
2016-06-26

<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
        <title>挑战题</title>
        <script src="http://libs.baidu.com/jquery/1.9.0/jquery.js" type="text/javascript"></script>
    </head>
    <body>
    <button id="btn">读取</button>
    <ul></ul>
    <script type="text/javascript">
    $(function(){
        var jsonInfo=[
            {"name":"张1","score":"60"},
            {"name":"张2","score":"70"},
            {"name":"张3","score":"80"},
            {"name":"张4","score":"90"},
            ];
        $("#btn").bind("click",function(){ 
            $.each(jsonInfo,function(i){
                if(i==2){
                  $("ul").append("<li>姓名："+jsonInfo[i].name+"&nbsp;分数："+jsonInfo[i].score+"</br></li>");  
                }   
            });
        });  
    });
         
    </script>    
    </body>
</html>

主要有两处错误，一是.each()的用法为$.each(array,function)，对应你代码的第行；二是相等号为==，对应你代码的行。