js实现图片切换效果_html/css_WEB-ITnose
用js实现点击按钮,图片切换的效果:
1 <div class="box" id="box"> 2 <div class="img_box" id="img_box"> 3 <img class="image lazy" src="/static/imghw/default1.png" data-src="../raw/b1.jpg" alt="js实现图片切换效果_html/css_WEB-ITnose" > 4 <img class="image lazy" src="/static/imghw/default1.png" data-src="../raw/b2.jpg" alt="js实现图片切换效果_html/css_WEB-ITnose" > 5 <img class="image lazy" src="/static/imghw/default1.png" data-src="../raw/b3.jpg" alt="js实现图片切换效果_html/css_WEB-ITnose" > 6 <img class="image lazy" src="/static/imghw/default1.png" data-src="../raw/b4.jpg" alt="js实现图片切换效果_html/css_WEB-ITnose" > 7 </div> 8 <div id="left" class="switch"></div> 9 <div id="right" class="switch"></div>10 </div>
结构:用一个固定宽高的div来做最外层的容器,设置overflow为hidden,
然后内层img_box设置宽度为四倍box的宽度,高度相同,也就是说img_box里面盛放四张img,但是可见的只有一张,下面的两个div,left和right是充当按钮实现点击切换图片,切换图片也就是改变img_box的left属性,所以img_box应该设置position为absolute,为了方便起见,box的position设置为relation,这样img_box就是相对box进行定位了。四张图片设置float为left,宽度和高度与box相同.
CSS代码:
1 *{ 2 margin: 0; 3 padding: 0; 4 } 5 .box{ 6 width: 800px; 7 height: 400px; 8 margin: 20px auto; 9 position: relative;10 overflow: hidden;11 }12 .img_box{13 height: 400px;14 width: 3200px;15 position: absolute;16 -moz-transition: 0.5s;17 -webkit-transition: 0.5s;18 }19 img{20 width: 800px;21 height: 400px;22 float: left;23 }24 .switch{25 width: 200px;26 height: 100%;27 position: absolute;28 29 }30 #left{31 left: 0px;32 top: 0px;33 background: -moz-linear-gradient(left, rgba(84, 84, 84, 0.50), rgba(20%,20%,20%,0));34 background: -webkit-linear-gradient(left, rgba(84, 84, 84, 0.50), rgba(20%,20%,20%,0));35 }36 #right{37 right:0px;38 top: 0px;39 background: -moz-linear-gradient(left, rgba(20%,20%,20%,0), rgba(84, 84, 84,0.5));40 background: -webkit-linear-gradient(left, rgba(20%,20%,20%,0), rgba(84, 84, 84,0.5));41 }42 #left:hover{43 background: -moz-linear-gradient(left, rgba(0, 0, 0,0.5), rgba(20%,20%,20%,0));44 background: -webkit-linear-gradient(left, rgba(0, 0, 0,0.5), rgba(20%,20%,20%,0));45 }46 #right:hover{47 background: -moz-linear-gradient(left, rgba(20%,20%,20%,0), rgba(0, 0, 0,0.5));48 background: -webkit-linear-gradient(left, rgba(20%,20%,20%,0), rgba(0, 0, 0,0.5));49 }
left和right用到了背景颜色和透明度渐变的属性,只添加了火狐浏览器和webkit浏览器,另外现在有的IE浏览器是IE和webkit双内核如360安全浏览器
background: -moz-linear-gradient(left, rgba(84, 84, 84, 0.50), rgba(20%,20%,20%,0));
background: -webkit-linear-gradient(left, rgba(84, 84, 84, 0.50), rgba(20%,20%,20%,0));
为了实现切换的时候平滑过渡,所以添加了transition属性:
-moz-transition: 0.5s;
-webkit-transition: 0.5s;
js代码:
1 var box; 2 var count=1; 3 window.onload=function(){ 4 box=document.getElementById("img_box"); 5 var left=document.getElementById("left"); 6 var right=document.getElementById("right"); 7 left.addEventListener("click",_left); 8 right.addEventListener("click",_right); 9 document.body.addEventListener("mouseover",demo);10 }11 function _right(){12 var dis=0;13 if(count<4){14 dis=count*800;15 }else{16 dis=0;17 count=0;18 }19 box.style.left="-"+dis+"px";20 count+=1;21 }22 function _left(event){23 var dis=0;24 if(count>1){25 dis=(2-count)*800;26 }else{27 dis=-3*800;28 count=5;29 }30 box.style.left=dis+"px";31 count-=1;32 }
用全局变量count来记录当前显示的第几张图片,当点击切换按钮的时候根据count来计算应该显示第几张照片,然后计算并设置img_box的left属性即可。
效果:http://huizit1.applinzi.com/A-copy/img_switch/img_switch.html
(tips:第一张和第二张图片都是华妃,第二张是截取的剧里面的原图,感觉颜色太暗所以调了一下颜色放在了第一张)

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