mui popover 自定义 弹出位置 显示 隐藏

mui popover

一.要显示、隐藏弹出菜单插件，mui推荐使用锚点方式.

1.页面顶部导航栏、底部工具栏固定位置
<header class="mui-bar mui-bar-nav">
    <a class="mui-action-back mui-icon mui-icon-left-nav mui-pull-left"></a>
    <a id="menu" class="mui-action-menu mui-icon mui-icon-bars mui-pull-right" href="#topPopover"></a>
    <h1 class="mui-title">右上角弹出菜单</h1>
</header>
<footer class="mui-bar mui-bar-footer">
    <a href="#bottomPopover" class="mui-btn mui-btn-link mui-pull-right">右下角弹出菜单</a>
</footer>
<!--右上角弹出菜单-->
<div id="topPopover" class="mui-popover">
    <div class="mui-popover-arrow"></div>
    <div class="mui-scroll-wrapper">
        <div class="mui-scroll">
            <ul class="mui-table-view">
                <li class="mui-table-view-cell"><a href="#">Item1</a></li>
                <li class="mui-table-view-cell"><a href="#">Item2</a></li>
                <li class="mui-table-view-cell"><a href="#">Item3</a></li>
                <li class="mui-table-view-cell"><a href="#">Item4</a></li>
                <li class="mui-table-view-cell"><a href="#">Item5</a></li>
            </ul>
        </div>
    </div>
</div>
<!--右下角弹出菜单-->
<div id="bottomPopover" class="mui-popover mui-popover-bottom">
    <div class="mui-popover-arrow"></div>
    <div class="mui-scroll-wrapper">
        <div class="mui-scroll">
            <ul class="mui-table-view">
                <li class="mui-table-view-cell"><a href="#">Item1</a></li>
                <li class="mui-table-view-cell"><a href="#">Item2</a></li>
                <li class="mui-table-view-cell"><a href="#">Item3</a></li>
                <li class="mui-table-view-cell"><a href="#">Item4</a></li>
                <li class="mui-table-view-cell"><a href="#">Item5</a></li>
                <li class="mui-table-view-cell"><a href="#">Item6</a></li>
            </ul>
        </div>
    </div>
</div>

2.其它区域要使用弹出菜单，都要准确计算物理位置，从而实现弹出菜单的绝对定位； mui封装的手势事件中，可以获得点击位置，通过这些位置可实现任意区域的弹出菜单显示
<div class="mui-content">
    <div class="mui-content-padded">
        <p>
            <a href="#middlePopover" class="mui-btn mui-btn-primary mui-btn-block mui-btn-outlined" style="padding: 5px 20px;">打开弹出菜单</a>
        </p>
    </div>
</div>
<!-- a标签所在位置弹出菜单 -->
<div id="middlePopover" class="mui-popover">
    <div class="mui-popover-arrow"></div>
    <div class="mui-scroll-wrapper">
        <div class="mui-scroll">
            <ul class="mui-table-view">
                <li class="mui-table-view-cell"><a href="#">Item1</a></li>
                <li class="mui-table-view-cell"><a href="#">Item2</a></li>
                <li class="mui-table-view-cell"><a href="#">Item3</a></li>
                <li class="mui-table-view-cell"><a href="#">Item4</a></li>
                <li class="mui-table-view-cell"><a href="#">Item5</a></li>
                <li class="mui-table-view-cell"><a href="#">Item6</a></li>
            </ul>
        </div>
    </div>
</div>

二.通过js的方式控制弹出菜单,实现任意元素上弹出.

有时要做点击页面顶部导航栏、底部工具栏也在某一其他元素上弹出时,就适合用js的方式控制.

//方法:
    mui(弹出层元素).popover(status[,anchor]);
//示例:
    mui(弹出层元素).popover('show ');//show hide toggle
     //传入toggle参数，用户也无需关心当前是显示还是隐藏状态，mui会自动识别处理；
     mui(弹出层元素).popover('toggle',document.getElementById(显示位置元素)); 

<header class="mui-bar mui-bar-nav"> 
　　<a class="mui-action-back mui-icon mui-icon-left-nav mui-pull-left"></a> 
　　<a id="menu" class="mui-action-menu mui-icon mui-icon-bars mui-pull-right" href="#topPopover"></a> 
　　<h1 class="mui-title">右上角弹出菜单</h1> 
</header>
<div class="mui-content">
    <div id='list' class="mui-indexed-list" style="">
        <div class="mui-indexed-list-search mui-input-row mui-search" style="border-radius:6px;margin: 6px 10px;">
            <input type="search" class="mui-input-clear mui-indexed-list-search-input" placeholder="搜索" style="height:30px;">
        </div>
    </div>            
</div>    
// 点击弹出
mui('.mui-bar').on('tap','.mui-btn',function(){
    mui('#topPopover').popover('show',document.getElementById("list")); // 将id为list的元素放在想要弹出的位置
});