css样式

html,body{
    width: 100%;
    height: 100%;
    margin: 0;padding: 0;
}
/*导航图标*/
.NMH-g-navicon{
    position: fixed;
    top: 40%;
    right: 020px;
    width: 100px;
    height: 100px;
}
.NMH-g-navicon.Jnmh-onleft{
    right: auto;
    left: 020px;
}
/*导航图标logo按钮*/
.NMH-g-navicon .Jnmh-btnlogo{
    position: absolute;
    display: block;
    width: 100px;
    height: 100px;
    top: 50%;
    right: 0;
    margin-top: -50px;
    border: 0;
    background: url(img/icon_128.png) no-repeat center center;
    background-size: 95% 95%;
    border: 1px solid rgba(0, 0, 0, 0.1);
    box-shadow: rgba(0, 0, 0, 0.12) 0px 6px 10px 0px;
    outline: none;
    border-radius: 50%;
    z-index: 1;
}
.NMH-g-navicon .Jnmh-btnlogohover{
    position: absolute;
    display: block;
    width: 100px;
    height: 100px;
    top: 50%;
    right: 0;
    margin: 0;padding: 0;
    margin-top: -50px;
    border: 0;
    overflow: hidden;
    /*background-color: red;*/
}
/*导航图标logo按钮-鼠标经过*/
.NMH-g-navicon.Jnmh-open .Jnmh-btnlogohover{
    margin-top: -150px;    
    width: 200px;
    height: 300px;
    border-radius: 150px 0 0 150px;
}
.NMH-g-navicon.Jnmh-onleft .Jnmh-btnlogohover{
    left: 0;
    right: auto;
    border-radius: 0 150px 150px 0;
}
/*导航图标菜单子容器*/
.NMH-g-navicon .Jnmh-m-submenu{
    position: absolute;
    background-color: transparent;
    list-style: none;
    top: -020px;
    bottom: -020px;
    left: -020px;
    right: -020px;
    margin: 0;
    padding: 0;
}
.NMH-g-navicon .Jnmh-m-submenu .Jnmh-subli{
    position: absolute;
    width: 100%;height: 100%;
    transform: rotate(0deg);
    -webkit-transform: rotate(0deg);
    transition: all 0.8s ease-in-out;
}
.Jnmh-m-submenu .Jnmh-subdl{
    position: absolute;
    left: 50%;
    bottom: 100%;
    width: 0;
    height: 0;
    line-height: 1px;
    margin-left: 0;
    background: #fff;
    border-radius: 50%;
    text-align: center;
    font-size: 1px;
    overflow: hidden;
    cursor: pointer;
    box-shadow: none;
    transition: all 0.8s ease-in-out, color 0.1s, background 0.1s;
}
/*导航图标-展开菜单时*/
.NMH-g-navicon.Jnmh-open .Jnmh-m-submenu .Jnmh-subdl{
    width: 80px;
    height: 80px;
    line-height: 80px;
    margin-left: -40px;
    box-shadow: 0 3px 3px rgba(0, 0, 0, 0.1);
    font-size: 14px;
}
/*导航图标-三级菜单容器*/
.NMH-g-navicon.Jnmh-open .Jnmh-m-submenu .Jnmh-subdd{
    position: absolute;
    line-height: normal;
}

html代码

<div id="nmh-navicon" class="NMH-g-plugin NMH-g-navicon">
        <button class="Jnmh-btnlogo"></button>
        <ins class="Jnmh-btnlogohover"></ins>
        <ul class="Jnmh-m-submenu">
            <li class="Jnmh-subli">
                <dl class="Jnmh-subdl">
                    <dt class="NMH-subdt">电商平台</dt>
                    <dd class="NMH-subdd"></dd>
                </dl>
            </li>
            <li class="Jnmh-subli">
                <dl class="Jnmh-subdl">
                    <dt class="NMH-subdt">选品平台</dt>
                    <dd class="NMH-subdd"></dd>
                </dl>
            </li>
            <li class="Jnmh-subli">
                <dl class="Jnmh-subdl">
                    <dt class="NMH-subdt">会员升级</dt>
                    <dd class="NMH-subdd"></dd>
                </dl>
            </li>
            <li class="Jnmh-subli">
                <dl class="Jnmh-subdl">
                    <dt class="NMH-subdt">产品操作</dt>
                    <dd class="NMH-subdd"></dd>
                </dl>
            </li>
            <li class="Jnmh-subli">
                <dl class="Jnmh-subdl">
                    <dt class="NMH-subdt">个人中心</dt>
                    <dd class="NMH-subdd"></dd>
                </dl>
            </li>
        </ul>
    </div>

javascript代码

<script type="text/javascript" src="https://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js"></script>
<script type="text/javascript">
    // 监听鼠标移入logo事件
    $(document).on('mouseenter','.Jnmh-btnlogo',function(){
        $('#nmh-navicon').addClass('Jnmh-open');
        GtoggleNavlogo();
    });
    // 监听鼠标移除导航球移除事件（展开收缩悬浮球为什么不直接监听#nmh-navicon而多了一步监听logo是为了减少边缘触发）
    $(document).on('mouseleave','#nmh-navicon',function(){
        $('#nmh-navicon').removeClass('Jnmh-open');
        GtoggleNavlogo();
    });
    var GtoggleNavlogo = function(){
        var li = $('#nmh-navicon').find('.Jnmh-subli');
        var lilen = li.length;
        var avgDeg =  180/(lilen-1);// 平均角度
        var initDeg = 0;// 起始方向角度
        if($('#nmh-navicon').hasClass('Jnmh-onleft')){
            // 如果悬浮球被拖拽到左边，则二级菜单则显示右侧
            li.css({transform: 'rotate(0deg)'});
            initDeg =  180;
        }else{
            // 默认悬浮球在右边，二级菜单显示在左侧
            li.css({transform: 'rotate(-360deg)'});
        }
        for(var i=0,j=lilen-1; i<lilen; i++,j--) {
            var d =  initDeg - (i*avgDeg);
            var z = initDeg?j:i;
            // console.log(d);
            $('#nmh-navicon').hasClass('Jnmh-open') ? GrotateNavlogo(li[z],d) : GrotateNavlogo(li[z],0);
        }
    };
    var GrotateNavlogo = function(dom,deg){
        $({a:0}).animate({a:deg}, {
            step: function(now,fx) {
                $(dom).css({ transform: 'rotate('+now+'deg)' });
                $(dom).children().css({ transform: 'rotate('+(-now)+'deg)' });
            }, duration: 0
        });
    }
    // 鼠标拖动logo移动
    $(document).on('mousedown','.Jnmh-btnlogo',function(e_down){
        var wrap = $('#nmh-navicon');
        wrap.removeClass('Jnmh-open');
        $('.Jnmh-m-submenu').hide();
        GtoggleNavlogo();
        var positionDiv = wrap.offset();
        var distenceX = e_down.pageX - positionDiv.left;
        var distenceY = e_down.pageY - positionDiv.top + $(document).scrollTop();
        $(document).mousemove(diy_move);
        function diy_move(e_move){
            var x = e_move.pageX - distenceX;
            var y = e_move.pageY - distenceY;
            if (x < 0) {
                x = 0;
            } else if (x > $(document).width() - wrap.outerWidth(true)) {
                x = $(document).width() - wrap.outerWidth(true);
            }
            if (y < 0) {
                y = 0;
            } else if (y > $(window).height() - wrap.outerHeight(true)) {
                y = $(window).height() - wrap.outerHeight(true);
            }
            $(wrap).css({
                'left': x + 'px',
                'top': y + 'px'
            });
        }
        $(document).mouseup(function() {
            var x = $(wrap).offset().left;
            var rm = '',ad = 'Jnmh-open';
            if(x > $(document).width()/2){
                x = $(document).width() - wrap.outerWidth(true) -10 ;
                rm = 'Jnmh-onleft';
            }else{
                x = 10;
                ad += ' Jnmh-onleft';
            }
            $(wrap).css({left: x + 'px'}).addClass(ad).removeClass(rm);
            $('.Jnmh-m-submenu').show();
            GtoggleNavlogo();
            $(document).unbind('mousemove',diy_move);
        });
    });
</script>