WeUI Picker动态绑定数据与Zepto加载顺序问题

Picker组件初始化代码示例

<div class="weui-cell">
        <div class="weui-cell__hd"><label for="time-format" class="weui-label">性别</label></div>
        <div class="weui-cell__bd">
          <input class="weui-input " id="appl_sex" name="appl_sex" type="text" value="">
        </div>
      </div>
<div id="box">
   <input type="text" id='camera' value="前置摄像头"/>
</div>

$("#appl_sex").picker({
  title: "请选择",
  cols: [
    {
      textAlign: 'center',
      values: ["1",'2']
    }
  ],
  onChange: function(p, v, dv) {
    console.log(p, v, dv);
  },
  onClose: function(p, v, d) {
    console.log("close");
  }
});
$('#appl_sex').change(function () {
  /*选择设备号后,根据当前设备号设置不同的摄像头选项,具体判断逻辑根据具体的项目而定*/
  var val = $("#appl_sex").val();
  if (val == "1") {
     $("#box").empty();
     $("#box").html("<input type='text' id='camera' value='前置摄像头'/>");
     $("#camera").picker({
       title: "请选择摄像头",
       cols: [
          {
            textAlign: 'center',
            values: ['前置摄像头']
          }
       ]
     });
   } else {
     $("#box").empty();
     $("#box").html("<input type='text' id='camera' value='前置摄像头'/>");
     $("#camera").picker({
       title: "请选择摄像头",
       cols: [
          {
            textAlign: 'center',
            values: ['前置摄像头', '后置摄像头', '前+后摄像头']
          }
       ]
     });
   }
});

完整HTML结构示例

<!DOCTYPE html>
<html lang="zh-cmn-Hans">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width,initial-scale=1,user-scalable=0">
  <title>WeUI</title>
  <link rel="stylesheet" href="./weui.css"/>
 <script src="./zepto.min.js"></script>
</head>
<body ontouchstart>
<div class="page">
  <div class="page__bd page__bd_spacing">
    <a href="javascript:;" class="weui-btn weui-btn_default" id="showPicker">单列选择器</a>
  </div>
</div>
<script type="text/javascript">
  $('#showPicker').on('click', function () {
    weui.picker([{
      label: '飞机票',
      value: 0
    }, {
      label: '火车票',
      value: 1
    }, {
      label: '的士票',
      value: 2
    },{
      label: '公交票 (disabled)',
      disabled: true,
      value: 3
    }, {
      label: '其他',
      value: 4
    }], {
      onChange: function (result) {
        console.log(result);
      },
      onConfirm: function (result) {
        console.log(result);
      }
    });
  });
</script>
  <script type="text/javascript" src="https://res.wx.qq.com/open/js/jweixin-1.0.0.js"></script>
  <script src="./weui.min.js"></script>
</body>
</html>