js学习心得_一个简单的动画库封装tween.js

前端之家收集整理的这篇文章主要介绍了js学习心得_一个简单的动画库封装tween.js前端之家小编觉得挺不错的,现在分享给大家,也给大家做个参考。

<p style="text-align: center">

具体代码如下:

SEOut: function(t,d){ return -c *(t/=d)*(t-2) + b; },easeInOut: function(t,d){ if ((t/=d/2) < 1) return c/2*t*t + b; return -c/2 * ((--t)*(t-2) - 1) + b; } },Cubic: {//三次方的缓动(t^3) easeIn: function(t,d){ return c*(t/=d)*t*t + b; },d){ return c*((t=t/d-1)*t*t + 1) + b; },d){ if ((t/=d/2) < 1) return c/2*t*t*t + b; return c/2*((t-=2)*t*t + 2) + b; } },Quart: {//四次方的缓动(t^4); easeIn: function(t,d){ return c*(t/=d)*t*t*t + b; },d){ return -c * ((t=t/d-1)*t*t*t - 1) + b; },d){ if ((t/=d/2) < 1) return c/2*t*t*t*t + b; return -c/2 * ((t-=2)*t*t*t - 2) + b; } },Quint: {//5次方的缓动(t^5); easeIn: function(t,d){ return c*(t/=d)*t*t*t*t + b; },d){ return c*((t=t/d-1)*t*t*t*t + 1) + b; },d){ if ((t/=d/2) < 1) return c/2*t*t*t*t*t + b; return c/2*((t-=2)*t*t*t*t + 2) + b; } },Sine: {//正弦曲线的缓动(sin(t)) easeIn: function(t,d){ return -c * Math.cos(t/d * (Math.PI/2)) + c + b; },d){ return c * Math.sin(t/d * (Math.PI/2)) + b; },d){ return -c/2 * (Math.cos(Math.PI*t/d) - 1) + b; } },Expo: {//指数曲线的缓动(2^t); easeIn: function(t,d){ return (t==0) ? b : c * Math.pow(2,10 * (t/d - 1)) + b; },d){ return (t==d) ? b+c : c * (-Math.pow(2,-10 * t/d) + 1) + b; },d){ if (t==0) return b; if (t==d) return b+c; if ((t/=d/2) < 1) return c/2 * Math.pow(2,10 * (t - 1)) + b; return c/2 * (-Math.pow(2,-10 * --t) + 2) + b; } },Circ: {//圆形曲线的缓动(sqrt(1-t^2)); easeIn: function(t,d){ return -c * (Math.sqrt(1 - (t/=d)*t) - 1) + b; },d){ return c * Math.sqrt(1 - (t=t/d-1)*t) + b; },d){ if ((t/=d/2) < 1) return -c/2 * (Math.sqrt(1 - t*t) - 1) + b; return c/2 * (Math.sqrt(1 - (t-=2)*t) + 1) + b; } },Elastic: {//指数衰减的正弦曲线缓动; easeIn: function(t,d,a,p){ if (t==0) return b; if ((t/=d)==1) return b+c; if (!p) p=d*.3; if (!a || a < Math.abs(c)) { a=c; var s=p/4; } else var s = p/(2*Math.PI) * Math.asin (c/a); return -(a*Math.pow(2,10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )) + b; },p){ if (t==0) return b; if ((t/=d)==1) return b+c; if (!p) p=d*.3; if (!a || a < Math.abs(c)) { a=c; var s=p/4; } else var s = p/(2*Math.PI) * Math.asin (c/a); return (a*Math.pow(2,-10*t) * Math.sin( (t*d-s)*(2*Math.PI)/p ) + c + b); },p){ if (t==0) return b; if ((t/=d/2)==2) return b+c; if (!p) p=d*(.3*1.5); if (!a || a < Math.abs(c)) { a=c; var s=p/4; } else var s = p/(2*Math.PI) * Math.asin (c/a); if (t < 1) return -.5*(a*Math.pow(2,10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )) + b; return a*Math.pow(2,-10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )*.5 + c + b; } },Back: {//超过范围的三次方缓动((s+1)*t^3 - s*t^2); easeIn: function(t,s){ if (s == undefined) s = 1.70158; return c*(t/=d)*t*((s+1)*t - s) + b; },s){ if (s == undefined) s = 1.70158; return c*((t=t/d-1)*t*((s+1)*t + s) + 1) + b; },s){ if (s == undefined) s = 1.70158; if ((t/=d/2) < 1) return c/2*(t*t*(((s*=(1.525))+1)*t - s)) + b; return c/2*((t-=2)*t*(((s*=(1.525))+1)*t + s) + 2) + b; } },zfBounce: {//指数衰减的反弹缓动。 easeIn: function(t,d){ return c - zhufengEffect.zfBounce.eaSEOut(d-t,d) + b; },d){ if ((t/=d) < (1/2.75)) { return c*(7.5625*t*t) + b; } else if (t < (2/2.75)) { return c*(7.5625*(t-=(1.5/2.75))*t + .75) + b; } else if (t < (2.5/2.75)) { return c*(7.5625*(t-=(2.25/2.75))*t + .9375) + b; } else { return c*(7.5625*(t-=(2.625/2.75))*t + .984375) + b; } },d){ if (t < d/2) return zhufengEffect.zfBounce.easeIn(t*2,d) * .5 + b; else return zhufengEffect.zfBounce.easeOut(t*2-d,d) * .5 + c*.5 + b; } } }; //move:实现多方向的运动动画 /* curEle:当前要运动的元素 target:当前动画的目标位置,存储的是每一个方向的目标位置{left:xxx,top:xxx...} duration:当前动画的总时间 */ //effect支持以下的情况 /*

*/
function move(curEle,target,duration,effect,callback){
//处理我们需要的动画效果
var tempEffect = myEffect.Linear;
if(typeof effect === "number"){
switch(effect){
case 0:
tempEffect = myEffect.Linear;
break;
case 1:
tempEffect = myEffect.Circ.easeInOut;
break;
case 2:
tempEffect = myEffect.Elastic.easeOut;
break;
case 3:
tempEffect = myEffect.Back.easeOut;
break;
case 4:
tempEffect = myEffect.Bounce.easeOut;
break;
case 5:
tempEffect = myEffect.Expo.easeIn;
}
}else if(effect instanceof Array){
tempEffect = effect.length>=2 ? myEffect[effect[0]][effect[1]] : myEffect[effect[0]]
}else if(typeof effect === "function"){
//我们的实际意义应该是:effect是不传递值的,传递进来的函数应该是回调函数的值
callback = effect;
}

//在每一次执行<a href="https://www.jb51.cc/tag/fangfa/" target="_blank" class="keywords">方法</a>之前,首先把当前元素之前正在运行的动画结束掉
window.clearInterval(curEle.timer);
//根据target<a href="https://www.jb51.cc/tag/huoqu/" target="_blank" class="keywords">获取</a>每一个方向的起始值begin和总距离change
var begin = {},change = {};
for(var key in target){
  if(target.hasOwnProperty(key)){
    begin[key] = utils.css(curEle,key)
    change[key] = target[key] - begin[key];

  }
}
//实现多方向的运动动画
var time = 0;
curEle.timer = window.setInterval(function(){
  time+=10;
  //到达目标:结束动画,让当前元素的样式值等于目标样式值
  if(time>=duration){
    utils.css(curEle,target);
    window.clearInterval(curEle.timer);
    //在动画结束的时候,如果<a href="https://www.jb51.cc/tag/yonghu/" target="_blank" class="keywords">用户</a>把回调<a href="https://www.jb51.cc/tag/hanshu/" target="_blank" class="keywords">函数</a>传递给我了,我就把<a href="https://www.jb51.cc/tag/yonghu/" target="_blank" class="keywords">用户</a>传递的回调<a href="https://www.jb51.cc/tag/hanshu/" target="_blank" class="keywords">函数</a>执行,不仅执行还把this的指向改为当前操作的元素

    typeof callback === "function" ? callback.call(curEle) : null;
    //或者callback && callback()
    return;
  }
  //没到达目标:分别<a href="https://www.jb51.cc/tag/huoqu/" target="_blank" class="keywords">获取</a>每一个方向的当前位置,给当前位置设置样式即可。
  for(var key in target){
    if(target.hasOwnProperty(key)){
      var curPos = tempEffect(time,begin[key],change[key],duration);
      utils.css(curEle,key,curPos);
    }
  }
},10)

}

window.myAnimate = move;
}()

以上这篇js学习心得_一个简单的动画库封装tween.js就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持编程之家。

原文链接:https://www.f2er.com/js/37873.html

猜你在找的JavaScript相关文章