為什么獲取到的是undefined？
<!DOCTYPE?html>
<html>
????<head>
????????<meta?http-equiv="Content-Type"?content="text/html;?charset=utf-8"?/>
????????<title>挑戰題</title>
????????<script?src="http://libs.baidu.com/jquery/1.9.0/jquery.js"?type="text/javascript"></script>
????</head>
????<body>
????????<form>
????????????<label>
????????????????<input?id="txt"?type="text"?name="UserName"?placeholder="請輸入姓名">性別:
????????????????<select?id="sex">
????????????????????<option>女</option>
????????????????????<option>男</option>
????????????????</select>
????????????</label>
????????????<input?id="show-btn"?type="button"?value="顯示數據">
????????</form>
????????<ul?id="list"></ul>
????<script>
????????var?json=[{
????????????"name":?$("#txt").val(),
????????????"sex":?$("#sex").val()
????????}];
????????$("#show-btn").click(function(){
????????????$.each(json,function(i){
????????????????$("#list").append("<li>姓名："+json.name+"?性別:"+json.sex+"</li>");???
????????????});
????????});
????</script>
????</body>
</html>求解
2017-05-18
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>挑戰題</title>
<script src="http://libs.baidu.com/jquery/1.9.1/jquery.js"></script>
</head>
<body>
<div>
<span>姓名：</span>
<span><input id="text" type="text" name="UserName" placeholder="請輸入姓名"></span></br>
<span>性別：</span>
<span><select id="sex">
<option>男</option>
<option>女</option>
</select></span></br>
<input id="btn" type="button" value="提交">
</div>
<ul id="list">
</ul>
<script>
$('#btn').on("click",function(){
//方法1，直接獲取，記得寫在函數里面，當改變時動態獲取
var ?json=[{
"name": $("#text").val(),
"sex": $("#sex").val()
}]
//方法2動態添加 ?var json=[]; ?json.push({"name": $("#text").val(),"sex":$("#sex").val()});
$.each(json,function(index){
$('#list').append("<li>姓名為："+json[index].name+"</br>性別："+json[index].sex+"</li>");
})
})
</script>
</body>
</html>
2017-05-16
把json放到click事件里，
json.name和json.sex改為json[i].name和json[i].sex