js实现交换运动效果的方法

时间:2021-05-26

本文实例讲述了js实现交换运动效果的方法。分享给大家供大家参考。具体分析如下:

实现后的效果,点击互相交换位置和距离左边和上角的信息。

要点一:

var now = s_pic_li[0];for(var i=0; i<s_pic_li.length; i++){s_pic_li[i].onclick = function(){if(this == now) return false;var w = now.offsetWidth;var h = now.offsetHeight;var l = now.offsetLeft;var t = now.offsetTop;var w1= this.offsetWidth;var h1 = this.offsetHeight;var l1 = this.offsetLeft;var t1 = this.offsetTop;startrun(now,{width:w1,height:h1,left:l1,top:t1});startrun(this,{width:w,height:h,left:l,top:t});now=this;}}

循环给每一块加点击事件,获取交换双方的信息,然后执行运动函数,相关信息做为参数。

最后,上代码:

<!DOCTYPE html><html><head><meta charset="gb2312" /><title>无标题文档</title><style><!--body,ul,li{margin:0; padding:0;font:18px/1.5 arial; color:#333;}#big_pic{width:500px; height:400px;background:#ccc; text-align:center;position:absolute;}#s_pic li{float:left; width:100px;height:80px; display:inline;background:#06c; text-align:center;position:absolute; top:310px;}--></style><script><!--window.onload = function(){ var s_pic = document.getElementById("s_pic"); var s_pic_li = s_pic.getElementsByTagName("li"); var now = s_pic_li[0]; for(var i=0; i<s_pic_li.length; i++){ s_pic_li[i].onclick = function(){ if(this == now) return false; var w = now.offsetWidth; var h = now.offsetHeight; var l = now.offsetLeft; var t = now.offsetTop; var w1= this.offsetWidth; var h1 = this.offsetHeight; var l1 = this.offsetLeft; var t1 = this.offsetTop; startrun(now,{width:w1,height:h1,left:l1,top:t1}); startrun(this,{width:w,height:h,left:l,top:t}); now=this; } }}function getstyle(obj,name){ if(obj.currentStyle){ return obj.currentStyle[name]; }else{ return getComputedStyle(obj,false)[name]; }}function startrun(obj,json,fn){ clearInterval(obj.timer); obj.timer = setInterval(function(){ var isall = true; for(var attr in json){ var cur=0; if(attr == "opacity"){ cur = Math.round(parseFloat(getstyle(obj,attr))*100); }else{ cur = parseInt(getstyle(obj,attr)); } var speed = (json[attr] - cur)/8 speed = speed>0?Math.ceil(speed):Math.floor(speed); if(cur != json[attr]){ isall = false; } if(attr == "opacity"){ obj.style.filter = "alpha(opacity="+(cur+speed)+")"; obj.style.opacity = (cur+speed)/100; }else{ obj.style[attr] = cur+speed+"px"; } } if(isall){ clearInterval(obj.timer); if(fn){ fn(); } } },30);}//--></script></head><body><ul id="s_pic"> <li style="left:0; top:0; width:400px; height:300px">0</div> <li style="left:0;">1</li> <li style="left:110px;">2</li> <li style="left:220px;">3</li> <li style="left:330px;">4</li></ul></body></html>

希望本文所述对大家的javascript程序设计有所帮助。

声明:本页内容来源网络,仅供用户参考;我单位不保证亦不表示资料全面及准确无误,也不保证亦不表示这些资料为最新信息,如因任何原因,本网内容或者用户因倚赖本网内容造成任何损失或损害,我单位将不会负任何法律责任。如涉及版权问题,请提交至online#300.cn邮箱联系删除。

相关文章