html滑动仿悬浮球菜单效果的实现

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;
}

<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>

<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>