今日总结 上拉加载 loading toast

			window.onscroll = function(){
			//变量scrollTop是滚动条滚动时，距离顶部的距离
			var scrollTop = document.documentElement.scrollTop||document.body.scrollTop;
			//变量windowHeight是可视区的高度
			var windowHeight = document.documentElement.clientHeight || document.body.clientHeight;
			//变量scrollHeight是滚动条的总高度
			var scrollHeight = document.documentElement.scrollHeight||document.body.scrollHeight;
			           //滚动条到底部的条件
			if(scrollTop+windowHeight==scrollHeight){
			//进行判断
	 	 	var lat=document.getElementById("lat").innerHTML;
	 	 	var lng=document.getElementById("lng").innerHTML;
			var count=document.getElementById("count").innerHTML;
			var num= parseInt(count)+1;
			document.getElementById("count").innerHTML=num;
			//传参
				var jsonStr = JSON.stringify({"page":num,"lat":lat,"lng":lng});
				var token = md5(jsonStr + timestamp)+timestamp;	
				that.$http.post(url+"Index/index",{jsonStr:jsonStr,token:token},{emulateJSON: true}).then((response)=>{
				response=response.body;
					var pushList=response.respond;
					for (let i = 0; i < 10; i++) {
				          that.data.push(pushList[i]);
				     }
							 },
				(error)=>{
					alert("数据请求失败");
						  }
				);
					//到底部判断
			      									   }   
			}
					//上拉加载更多

//上拉 加载更多。本打算用betterscroll 可是看不懂，就用scroll判断

     <div id="toastC"><img src="./img/loader.gif" alt="" class="loader"></div>

// 在进行渲染时 将loading显示，渲染结束结束渲染，比如在渲染结束函数里放渲染结束事件

//toast同理，显示隐藏罢了