Mui mui-content 被header

dom结构不对。贴一下代码

在android 可以正常显示，在IOS下就出现这个问题被header 遮住。代码如下

<header class="mui-bar mui-bar-nav">  
            <a class="mui-action-back mui-icon mui-icon-left-nav mui-pull-left"></a>  
            <h1 class="mui-title">宝贝编辑</h1>  
            <button type="button"  onclick="upload()" class="mui-btn mui-btn-purple mui-pull-right">发布</button>  
        </header>  
        <div id="dcontent" class="mui-content">  
                <img  id="1" style="width:100%;"></img>  
            <table style="width:100%;">  
                <tbody>  
                    <tr>  
                        <td style="width:40%"><div class="button button-select" onclick="appendByCamera()">拍照</div></td>  
                        <td style="width:40%"><div class="button button-select" onclick="appendByGallery()">相册选取</div></td>  
                    </tr>  
                    <tr>  

                    </tr>  
                </tbody>  
            </table>  
        </div>