先給大家展示下效果圖:
向下滑動網頁的時候能夠自動加載圖片並顯示。
盛放圖片的盒子模型如下:
<div class="box"> <div class="box_img"> <img src="Img/8.jpg"> </div> </div>
設置img-width為150px,然後box_img添加內邊距和陰影效果,box的外邊距為0,添加內邊距。盒子的寬度是由img-width和邊距撐開的。也就是說盒子之間是沒有間距的,但是盒子內部有一些邊距的效果。這樣在js設置位置的時候就不用考慮邊距問題,直接調用box的寬度就可以了。
設置盛放所有box的div的position為relative,這樣在設置top值或是left值的時候,就不用考慮最外層的margin屬性。
放置圖片的位置:獲得第一行圖片的高度並且存放在數組裡面,接下來的圖片設置position為absolute,放置在高度最小的圖片的下面,然後設置top和left,並且把數組的最小值加上新放置的圖片的高度。也就是說HTML裡面原始放置的圖片除了第一行以外,其他的圖片都是在js裡面又重新定位的。
當滑動頁面到底部的時候觸發事件函數,緊接著放置一些圖片,這樣保證圖片的無限加載。
HTML文件:
<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-"> <title></title> <link rel="stylesheet" href="waterfall.css" type="text/css"> <script src="waterfall.js"></script> </head> <body> <div id="content"> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box" > <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box" > <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box" > <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box" > <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box"> <div class="box_img"> <img src="Img/.jpg"> </div> </div> <div class="box" > <div class="box_img"> <img src="Img/.jpg"> </div> </div> </div> </body> </html>
CSS文件:
*{ margin: ; padding:; } #content{ position: relative; background-color: #; } .box{ padding: px; float: left; } .box_img{ padding: px; border: px solid #cccccc; box-shadow: px #cccccc; border-radius: px; } img{ width: px; height: auto; }
js文件:
Math.floor()函數能夠向下取整。
Math.min.apply(null,heightArr);函數能獲得heightArr數組的最小值。
window.onscroll=function(){};滑動頁面的時候觸發這個函數。
document.documentElement.clientHeight;浏覽器顯示出來的高度。
document.documentElement.scrollTop;滑動的距離。
/** * Created by asua on 2016/4/9. */ window.onload=function(){ imgLocation("content","box"); var lodeImage={"Date":[{"src":"1.jpg"},{"src":"2.jpg"},{"src":"3.jpg"},{"src":"4.jpg"},{"src":"5.jpg"},{"src":"6.jpg"},{"src":"7.jpg"},{"src":"8.jpg"},{"src":"9.jpg"},{"src":"10.jpg"},]} window.onscroll=function(){ if(checkFlag()){ for(var i=0;i<lodeImage.Date.length;i++){ var box=document.createElement("div"); box.className="box"; var cparent=document.getElementById("content"); cparent.appendChild(box); var box_img=document.createElement("div"); box_img.className="box_img"; box.appendChild(box_img); var img=document.createElement("img"); img.src="Img/"+lodeImage.Date[i].src; box_img.appendChild(img); } imgLocation("content","box"); } } } function checkFlag(){ var cparent=document.getElementById("content"); var ccontent=getChildElement(cparent,"box"); var lastContentHeight=ccontent[ccontent.length-1].offsetTop; var scrollHeight=document.documentElement.scrollTop||document.body.scrollTop; var pageHeight=document.documentElement.clientHeight||document.body.clientHeight; console.log(lastContentHeight+":"+scrollHeight+":"+pageHeight); if(lastContentHeight<scrollHeight+pageHeight){ return true; } } function imgLocation(parent,child){ var cparent=document.getElementById(parent); var ccontent=getChildElement(cparent,child); var imgwidth=ccontent[0].offsetWidth; var cols=Math.floor(document.documentElement.clientWidth/imgwidth); cparent.style.cssText="width:"+imgwidth*cols+"px;margin:30px auto"; var heightArr=[]; for(var i=0;i<ccontent.length;i++){ if(i<cols){ heightArr.push(ccontent[i].offsetHeight); }else{ var minHeight=Math.min.apply(null,heightArr); var minIndex=getMinIndex(heightArr,minHeight); ccontent[i].style.position="absolute"; ccontent[i].style.top=minHeight+"px"; ccontent[i].style.left=ccontent[minIndex].offsetLeft+"px"; heightArr[minIndex]+=ccontent[i].offsetHeight; } } } function getMinIndex(heightArr,minHeight){ for(var i=0;i<heightArr.length;i++){ if(heightArr[i]==minHeight){ return i; } } } function getChildElement(parent,content){ var contentArr=[]; var allcontent=parent.getElementsByTagName("*"); for(var i=0;i<allcontent.length;i++){ if(allcontent[i].className==content){ contentArr.push(allcontent[i]); } } return contentArr; }
好了,關於js實現圖片自動加載的瀑布流效果代碼到此給大家介紹完了,希望對大家有所幫助!