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添加商品，让商品飞入购物车特效

2017-04-20 15:38 162 查看

需要的js库：

1、jquery

2、jquery.fly.min.js

3、requestAnimationFrame.js（兼容IE需要用到）

源码：

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
*{
padding: 0;
margin: 0;
}
a{
position: absolute;
right: 100px;
top: 10px;
}
</style>
</head>
<body>

<a href="#">我的购物车</a><br />

<img src="1.png"/> <br />
<button>加入购物车</button>

</body>

<script type="text/javascript" src="../js/jquery.min.js" ></script>
<script type="text/javascript" src="jquery.fly.min.js" ></script>
<!-- 兼容IE10 -->
<script type="text/javascript" src="requestAnimationFrame.js" ></script>
<script>
$(function(){
var cartLeft = $('a').offset().left - $(document).scrollTop(); // 获取a标签距离屏幕顶端的距离(因为fly插件的start开始位置是根据屏幕可视区域x，y来计算的，而不是根据整个文档的x，y来计算的)
var cartTop = $('a').offset().top; // 获取a标签的y坐标

　　　　　　  var btnLeft = $('button').offset().left - $(document).scrollTop();
　　　　　　  var btnTop = $('button').offset().top;

$("button").click(function(event){
var addcar = $('button');
var img = addcar.siblings('img').attr('src');
var flyer = $('<img class="u-flyer" src="'+img+'">');
flyer.fly({
start: {
left: btnLeft,
top: btnTop
},
end: {
left: cartLeft, //结束位置（必填）
top: cartTop, //结束位置（必填）
width: 0, //结束时宽度
height: 0 //结束时高度
},
onEnd: function(){ //结束回调
console.log('加入成功！');
this.destory(); //移除dom
}
});
});
})
</script>

</html>

文件：

1、jquery.fly.min.js：

/*! fly - v1.0.0 - 2014-12-22
* https://github.com/amibug/fly * Copyright (c) 2014 wuyuedong; Licensed MIT */
!function(a){a.fly=function(b,c){var d={version:"1.0.0",autoPlay:!0,vertex_Rtop:20,speed:1.2,start:{},end:{},onEnd:a.noop},e=this,f=a(b);e.init=function(a){this.setOptions(a),!!this.settings.autoPlay&&this.play()},e.setOptions=function(b){this.settings=a.extend(!0,{},d,b);var c=this.settings,e=c.start,g=c.end;f.css({marginTop:"0px",marginLeft:"0px",position:"fixed"}).appendTo("body"),null!=g.width&&null!=g.height&&a.extend(!0,e,{width:f.width(),height:f.height()});var h=Math.min(e.top,g.top)-Math.abs(e.left-g.left)/3;h<c.vertex_Rtop&&(h=Math.min(c.vertex_Rtop,Math.min(e.top,g.top)));var i=Math.sqrt(Math.pow(e.top-g.top,2)+Math.pow(e.left-g.left,2)),j=Math.ceil(Math.min(Math.max(Math.log(i)/.05-75,30),100)/c.speed),k=e.top==h?0:-Math.sqrt((g.top-h)/(e.top-h)),l=(k*e.left-g.left)/(k-1),m=g.left==l?0:(g.top-h)/Math.pow(g.left-l,2);a.extend(!0,c,{count:-1,steps:j,vertex_left:l,vertex_top:h,curvature:m})},e.play=function(){this.move()},e.move=function(){var b=this.settings,c=b.start,d=b.count,e=b.steps,g=b.end,h=c.left+(g.left-c.left)*d/e,i=0==b.curvature?c.top+(g.top-c.top)*d/e:b.curvature*Math.pow(h-b.vertex_left,2)+b.vertex_top;if(null!=g.width&&null!=g.height){var j=e/2,k=g.width-(g.width-c.width)*Math.cos(j>d?0:(d-j)/(e-j)*Math.PI/2),l=g.height-(g.height-c.height)*Math.cos(j>d?0:(d-j)/(e-j)*Math.PI/2);f.css({width:k+"px",height:l+"px","font-size":Math.min(k,l)+"px"})}f.css({left:h+"px",top:i+"px"}),b.count++;var m=window.requestAnimationFrame(a.proxy(this.move,this));d==e&&(window.cancelAnimationFrame(m),b.onEnd.apply(this))},e.destory=function(){f.remove()},e.init(c)},a.fn.fly=function(b){return this.each(function(){void 0==a(this).data("fly")&&a(this).data("fly",new a.fly(this,b))})}}(jQuery);

2、requestAnimationFrame.js：

(function () {
var lastTime = 0;
var vendors = ['webkit', 'moz'];
for (var x = 0; x < vendors.length && !window.requestAnimationFrame; ++x) {
window.requestAnimationFrame = window[vendors[x] + 'RequestAnimationFrame'];
window.cancelAnimationFrame =
window[vendors[x] + 'CancelAnimationFrame'] || window[vendors[x] + 'CancelRequestAnimationFrame'];
}

if (!window.requestAnimationFrame){
window.requestAnimationFrame = function (callback, element) {
var currTime = new Date().getTime();
var timeToCall = Math.max(0, 16 - (currTime - lastTime));
var id = window.setTimeout(function () {
callback(currTime + timeToCall);
},
timeToCall);
lastTime = currTime + timeToCall;
return id;
};
}
if (!window.cancelAnimationFrame){
window.cancelAnimationFrame = function (id) {
clearTimeout(id);
};
}
}());

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