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      教程列表

      抓包专区
      测试专区

      JavaScript twenn动画效果

      代码-多方向效果

      <!DOCTYPE html>
      <html>
      <head lang="en">
          <meta charset="UTF-8">
          <title>tween动画的基础支持</title>
          <style>
              #div1{
                  width: 100px;
                  height: 100px;
                  line-height: 100px;
                  text-align: center;
                  font-weight: bold;
                  background: orange;
                  position: absolute;
                  top: 0px;
                  left: 0px;
                  box-shadow: 5px 5px 10px blue;
                  border-radius: 10px;
                  border: 2px solid #ff0000;
                  opacity: 0.9;
                  filter:alpha(opacity=90);
              }
          </style>
      </head>
      <body>
      <div id="div1">朱安邦</div>
      </body>
      </html>
      <script>
          var oDiv=document.getElementById("div1");
          var jsonStr={
              "left":500
          };
          oDiv.onclick = function(){
              if(!this.timer){
                  starMove(this,jsonStr,1500,4,toGreen);
                  //starMove(this,jsonStr,1500,["fantan","starInOut"],toGreen);//可以制定运动类型;
              }
          };
      
      
      
      
          function starMove(ele,jsonStr,duration,moveTypeNum,fnCallback){
              //多态:方法重载:JS如何实现方法重载。一个方法,可以有不同类型或个数的参数
              //方法重写:子类上的方法覆盖了父类上的方法
              var typeNum=moveType.jiansu4.starOut;
              if(typeof moveTypeNum =="number"){
                  if(moveTypeNum===4){
                      typeNum=moveType.jiansu4.starOut;
                  }else if(moveTypeNum ===6){
                      typeNum=moveType.jiansu4.starOut;
                  }else if(moveTypeNum ===7 ){
                      typeNum=moveType.jiansu7.starOut;
                  }else if(moveTypeNum===8){
                      typeNum=moveType.dabai.starOut;
                  }else if(moveTypeNum===9){
                      typeNum=moveType.xiaobai.starOut;
                  }else if(moveTypeNum===10){
                      typeNum=moveType.fantan.starOut;
                  }
              }else if(typeof moveTypeNum=="object"){
                  if(moveTypeNum instanceof Array){
                      /*输入模式是["fantan","starInOut"]*/
                      if(moveTypeNum.length==1){
                          typeNum=moveType[moveTypeNum[0]];//moveTypeNum[0]是获取line方法
                      }else if(moveTypeNum.length==2){
                          typeNum=moveType[moveTypeNum[0]][moveTypeNum[1]]//moveType.jiansu1.starIn/out/inOut;
                      }
                  }
              }else if(typeof moveTypeNum=="function"){
                  fnCallback=moveTypeNum;
              }
      
              var oBegin={};//不同方向的起始值;
              var oChange={};//不同方向的运动距离;
              var booleanNum=0;
              for(var attr in jsonStr){
                  var begin=setCss(ele,attr);
                  var target=jsonStr[attr];
                  var change=target-begin;
                  if(change){
                      oBegin[attr]=begin;
                      oChange[attr]=change;
                      booleanNum++;
                  }
              }
              if(booleanNum===0){
                  if(typeof fnCallback=="function"){
                      fnCallback.call(ele);
                  }
                  return;
              }else{
                  var interval=13;
                  var times=0;
                  clearInterval(ele.timer);
                  ele.timer=window.setInterval(move,interval);
                  function move(){
                      times+=interval;
                      if(times>=duration){
                          clearInterval(ele.timer);
                          ele.timer=null;
                          for(var attr in jsonStr){
                              setCss(ele,attr,jsonStr[attr]);
                          }
                          if(typeof fnCallback=="function"){
                              fnCallback.call(ele);
                          }
                      }else{
                          for(var attr in oChange){
                              //动画效果在这里
                              var targetNumber=typeNum(times,oBegin[attr],oChange[attr],duration);
                              setCss(ele,attr,targetNumber);
                          }
                      }
                  }
              }
          };
      
      
          //回调方法;
          function toGreen(){
              setCss(this,"backgroundColor","green");
          };
      
          /*setCss*/
          function setCss(curEle,attr,value) {//设置CSS属性值和获取CSS;如果三个参数就是设置,2个参数就是获取;att是attribute的缩写;
              if(typeof value==="undefined"){//如果有第三个参数,就是设置Css;如果没有就是获取Css;
                  var reg = /^(?:margin|padding|border|float|position|display|background|backgroundColor)$/;
                  var flag="getElementsByClassName" in document;
                  var value = flag ? window.getComputedStyle(curEle, null)[attr] : curEle.currentStyle[attr];
                  return !reg.test(attr) ? parseFloat(value) : value;
              } else{
                  switch (attr) {
                      case "opacity":
                          curEle["style"][attr] = value;
                          curEle["style"]["filter"] = "alpha(opacity=" + (value * 100) + ")";
                          break;
                      case "float":
                          curEle["style"].cssFloat = value;
                          curEle["style"].styleFloat = value;
                          break;
                      case "backgroundColor":
                          curEle["style"][attr] = value;
                          break;
                      case "zIndex":
                          curEle["style"][attr] = value;
                          break;
                      default:
                          curEle["style"][attr] = !isNaN(value) ? value += "px" : value;
                  }
              }
          };
      
          /*数学计算*/
          var moveType = {
              /*直线运动*///当前时间*变化量/持续时间+初始值
              line: function(t,b,c,d){ return c*t/d + b; },
      
              /*减速中最长用的是4、6、7*/
              jiansu1: {//二次方的缓动(t^2);
                  starIn: function(t,b,c,d){
                      return c*(t/=d)*t + b;
                  },
                  starOut: function(t,b,c,d){
                      return -c *(t/=d)*(t-2) + b;
                  },
                  starInOut: function(t,b,c,d){
                      if ((t/=d/2) < 1) return c/2*t*t + b;
                      return -c/2 * ((--t)*(t-2) - 1) + b;
                  }
              },
              jiansu2: {//三次方的缓动(t^3)
                  starIn: function(t,b,c,d){
                      return c*(t/=d)*t*t + b;
                  },
                  starOut: function(t,b,c,d){
                      return c*((t=t/d-1)*t*t + 1) + b;
                  },
                  starInOut: function(t,b,c,d){
                      if ((t/=d/2) < 1) return c/2*t*t*t + b;
                      return c/2*((t-=2)*t*t + 2) + b;
                  }
              },
              jiansu3: {//四次方的缓动(t^4);
                  starIn: function(t,b,c,d){
                      return c*(t/=d)*t*t*t + b;
                  },
                  starOut: function(t,b,c,d){
                      return -c * ((t=t/d-1)*t*t*t - 1) + b;
                  },
                  starInOut: function(t,b,c,d){
                      if ((t/=d/2) < 1) return c/2*t*t*t*t + b;
                      return -c/2 * ((t-=2)*t*t*t - 2) + b;
                  }
              },
              jiansu4: {//5次方的缓动(t^5);
                  starIn: function(t,b,c,d){
                      return c*(t/=d)*t*t*t*t + b;
                  },
                  starOut: function(t,b,c,d){
                      return c*((t=t/d-1)*t*t*t*t + 1) + b;
                  },
                  starInOut: function(t,b,c,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;
                  }
              },
              jiansu5: {//正弦曲线的缓动(sin(t))
                  starIn: function(t,b,c,d){
                      return -c * Math.cos(t/d * (Math.PI/2)) + c + b;
                  },
                  starOut: function(t,b,c,d){
                      return c * Math.sin(t/d * (Math.PI/2)) + b;
                  },
                  starInOut: function(t,b,c,d){
                      return -c/2 * (Math.cos(Math.PI*t/d) - 1) + b;
                  }
              },
              jiansu6: {//指数曲线的缓动(2^t);
                  starIn: function(t,b,c,d){
                      return (t==0) ? b : c * Math.pow(2, 10 * (t/d - 1)) + b;
                  },
                  starOut: function(t,b,c,d){
                      return (t==d) ? b+c : c * (-Math.pow(2, -10 * t/d) + 1) + b;
                  },
                  starInOut: function(t,b,c,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;
                  }
              },
              jiansu7: {//圆形曲线的缓动(sqrt(1-t^2));
                  starIn: function(t,b,c,d){
                      return -c * (Math.sqrt(1 - (t/=d)*t) - 1) + b;
                  },
                  starOut: function(t,b,c,d){
                      return c * Math.sqrt(1 - (t=t/d-1)*t) + b;
                  },
                  starInOut: function(t,b,c,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;
                  }
              },
              /*大摆动的效果,非常绚丽;比xiaobai好*/
              dabai: {//指数衰减的正弦曲线缓动;
                  starIn: function(t,b,c,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;
                  },
                  starOut: function(t,b,c,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) * Math.sin( (t*d-s)*(2*Math.PI)/p ) + c + b);
                  },
                  starInOut: function(t,b,c,d,a,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;
                  }
              },
              xiaobai: {//超过范围的三次方缓动((s+1)*t^3 - s*t^2);
                  starIn: function(t,b,c,d,s){
                      if (s == undefined) s = 1.70158;
                      return c*(t/=d)*t*((s+1)*t - s) + b;
                  },
                  starOut: function(t,b,c,d,s){
                      if (s == undefined) s = 1.70158;
                      return c*((t=t/d-1)*t*((s+1)*t + s) + 1) + b;
                  },
                  starInOut: function(t,b,c,d,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;
                  }
              },
              fantan: {//指数衰减的反弹缓动。
                  starIn: function(t,b,c,d){
                      return c - moveType.fantan.starOut(d-t, 0, c, d) + b;
                  },
                  starOut: function(t,b,c,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;
                      }
                  },
                  starInOut: function(t,b,c,d){
                      if (t < d/2) return moveType.fantan.starIn(t*2, 0, c, d) * .5 + b;
                      else return moveType.fantan.starOut(t*2-d, 0, c, d) * .5 + c*.5 + b;
                  }
              }
          };
      </script>
      
      目录
      目录