js实现网页瀑布流加载实现分页效果
一般我们是这样子的。
1.当进入屏幕时,判断内容是否为空,如果不为空,开始初始化数据。
2.当往屏幕下拉时,判断数据的最底部与屏幕高度+滚动的高度的大小。如果最底部小于上面两者之和,重新请求接口,即加载数据。
3.当遇到数据超过某个页数时,停止加载或者用分页的形式显示,点击再显示内容。
var intf_url="http://111cn.net /intf";
var pathUrl = "http://111cn.net /";
var page=1;
var isLoadRB=false;
var ul_select=$("#fansList");
var btn_more=$("#loading");
if(ul_select.length <1) return ;
var is_more =true;
//跨域请求接口
function loadjs(src,callback){
var js= document.createElement('script');
js.src = src;
js.onreadystatechange = js.onload =function(){
if(!js.readyState || js.readyState=='loaded'
|| js.readyState=='complete'){
if(callback){callback()||callback};
}
};
js.charset="utf-8";
document.getElementsByTagName('head')[0].appendChild(js);
}
//回调函数
function fill(data){
if(data.pageCount==data.pageNo){
is_more=false;//如果数据全部加载完毕,取消加载
$("#loading").html("加载完毕");
}
}
//解析接口
function queryIntf(){
var url=page==1?intf_url+".json":intf_url+"_page"+page+".json";
loadJs(url,callback);
}
function callback(){
page++;
}
/*判断是否要加载接口*/
function needtoloadRB(){
var btn_top=btn_more.offset().top;
var window_height=$(window).height();
var scroll_Top=$(window).scrollTop();
return btn_top<scroll_Top+window_height?true:false;
}
$(window).scroll(function(){
var _needload=needtoloadRB();
if(_needload && isLoadRB==false &&is_more){isLoadRB=true;queryintf();}
})
window.onload = function(){
queryintf();
}
以上就是比较简单的随着下拉内容不断加载的思路代码。
json格式类似于(如果是动态接口,可以通过callback函数,则这里不用加fill()):
fill({"fans":[{"nickname":"蔡宝坚","website":"111cn.net ","youzhi":"2.5","time":"3分钟前"},{"nickname":"蔡宝坚","website":"111cn.net ","youzhi":"2.5","time":"3分钟前"},{"nickname":"蔡宝坚","website":"111cn.net ","youzhi":"2.5","time":"3分钟前"},{"nickname":"蔡宝坚","website":"111cn.net ","youzhi":"2.5","time":"3分钟前"},{"nickname":"蔡宝坚","website":"111cn.net ","youzhi":"2.5","time":"3分钟前"},{"nickname":"蔡宝坚","website":"111cn.net ","youzhi":"2.5","time":"3分钟前"},{"nickname":"蔡宝坚","website":"111cn.net ","youzhi":"2.5","time":"3分钟前"},{"nickname":"蔡宝坚","website":"111cn.net ","youzhi":"2.5","time":"3分钟前"},{"nickname":"蔡宝坚","website":"111cn.net ","youzhi":"2.5","time":"3分钟前"},{"nickname":"蔡宝坚","website":"111cn.net ","youzhi":"2.5","time":"3分钟前"}],"pageCount":2,"pageNo":1,"pageSize":10,"totalSize":20
});
原来静态也可以做接口回调。通过静态处理,则大大缓解了服务器压力和加速生成内容,是大流量网站必备的处理方式。