一、JavaScript运动框架之速度版
1.1 运动框架的实现思路
运动,其实就是在一段时间内改变
left
、 right
、 width
、 height
、 opactiy
的值,到达目的地之后停止
- 位移
top
,left
- 折叠
width
,height
- 淡入淡出
opacity
- 时间有关系
setInterval
setTimeout
- 用javascript直接获取行间样式很容易,但如果要获取非行间样式那我们只能借助函数了。我这里编写了一个名为getStyle的函数,专门处理取非行间的样式
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function getStyle(obj,attr){ return getComputedStyle(obj)[attr]?getComputedStyle(obj)[attr]:obj.currentStyle[attr]; } |
1.2 一些案例演示
1.2.1 运动之速
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<div id="box"></div> |
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#box { width: 100px; height: 100px; background: red; position: relative; left: 0; } |
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var box = document.getElementById("box"); var speed = 0; //步长 var target = 600; var timer = null; timer = setInterval(function(){ var curr = parseInt(getStyle(box,"left")); //去除getStyle(box,"left")的单位 if(curr == target){ clearInterval(timer); speed = 0; alert("运动结束"); }else{ speed +=10; box.style.left = speed + "px"; } },1000/30); //监控left的值的变化 怎么样拿到left的值 //alert(getComputedStyle(box)["width"]); //alert(box.currentStyle["left"]); // currentStyle --IE // getComputedStyle -- 非IE function getStyle(obj,attr){ return getComputedStyle(obj)[attr]?getComputedStyle(obj)[attr]:obj.currentStyle[attr]; } |
1.2.2 运动速度之封装1
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<div id="ball"></div> |
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#ball { width: 100px; height: 100px; background: blue; } |
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var ball = document.getElementById("ball"); ball.onmouseover = function(){ //同时变换 用的最多 //move(this,"width",500,10); //move(this,"height",500,10); move(ball,{"width":400,"height":300},10); } ball.onmouseout = function(){ //move(this,"width",100,-10); //move(this,"height",100,-10); move(ball,{"width":100,"height":100},-10); } function move(obj,json,speed){ clearInterval(obj.timer); var mark = true; obj.timer = setInterval(function(){ for(var attr in json){ var curr = parseInt(getStyle(obj,attr)); var target = json[attr]; if(curr != target){ obj.style[attr] = curr+speed+"px"; mark = false; } } if(mark){ clearInterval(obj.timer); } },1000/30); } function getStyle(obj,attr){ return getComputedStyle(obj)[attr]?getComputedStyle(obj)[attr]:obj.currentStyle[attr]; } |
- 需要注意的地方
- 当需要两个动画的时候,会执行后面一个,解决办法如下,回调函数
- 当需要两个以上的时候,需要考虑是否可写一行代码变换多个属性
- 变换不一致的时候,定时器被提前清除
1.2.3 运动速度之封装2–增加opacity
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<div id="ball"></div> |
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#ball { position: relative; left: 0; top: 0; width: 100px; height: 100px; background: blue; opacity: 1; } |
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var ball = document.getElementById("ball"); ball.onmouseover = function(){ move(ball,{"width":300,"height":300,"opacity":0.3}); } // ball.onmouseout = function(){ // move(ball,{"width":100,"height":100},-10); // } function move(obj,json){ clearInterval(obj.timer); var mark = true; obj.timer = setInterval(function(){ for(var attr in json){ var curr = null; var target = json[attr]; var speed = null; if(attr == "opacity"){ curr = getStyle(obj,attr)*100; speed = (target*100-curr)*0.15; }else { curr = parseInt(getStyle(obj,attr)); speed = (target - curr)*0.15; } speed = speed>0 ? Math.ceil(speed):Math.floor(speed); if(curr != target){ if(attr == "opacity"){ obj.style[attr] = (curr+speed)/100; }else { obj.style[attr] = curr+speed+"px"; } mark = false; } } if(mark){ clearInterval(obj.timer); } },1000/30); } function getStyle(obj,attr){ return getComputedStyle(obj)[attr]?getComputedStyle(obj)[attr]:obj.currentStyle[attr]; } |
- 需要注意的地方
- 当需要两个动画的时候,会执行后面一个,解决办法如下,回调函数
- 当需要两个以上的时候,需要考虑是否可写一行代码变换多个属性
- 变换不一致的时候,定时器被提前清除
- 速度
speed
不要写死
1.3 运动框架之应用
1.3.1 分享按钮
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<div id="ball"></div> <div id="box1"> <div id="box2">分享到</div> </div> |
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var box1 = document.getElementById("box1"); var ball = document.getElementById("ball"); box1.onmouseover = function(){ move(this,"left",0,10); } box1.onmouseout = function(){ move(this,"left",-100,-10); } //问题一:当需要两个动画的时候,会执行后面一个,解决办法如下,回调函数 ball.onmouseover = function(){ //同时变换 用的最多 //move(this,"width",500,10); //move(this,"height",500,10); //列队在执行 move(ball,"width",500,10,function(){ move(ball,"height",500,10); }); } ball.onmouseout = function(){ //move(this,"width",100,-10); //move(this,"height",100,-10); move(ball,"width",100,-10,function(){ move(ball,"height",100,-10); }); } var timer = null; function move(obj,attr,target,speed,callback){ clearInterval(timer); //obj.timer缓存到各自的obj下 timer = setInterval(function(){ var curr = parseInt(getStyle(obj,attr)); if(curr == target){ clearInterval(timer); callback && callback(); }else { obj.style[attr] = curr+speed+"px"; } },1000/30); } function getStyle(obj,attr){ return getComputedStyle(obj)[attr]?getComputedStyle(obj)[attr]:obj.currentStyle[attr]; } |
1.3.2运动框架之轮播图应用
1.3.2.1 焦点轮播–左右-无缝-速度版实现
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<div id="box"> <ul id="imgBox"> <li>![](http://upload-images.jianshu.io/upload_images/1480597-c72819402fb928e8.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)</li> <li>![](http://upload-images.jianshu.io/upload_images/1480597-6830ca74fe1e6fcd.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)</li> <li>![](http://upload-images.jianshu.io/upload_images/1480597-5d38376e63ffd0b0.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)</li> <li>![](http://upload-images.jianshu.io/upload_images/1480597-2aa932ffbba4091e.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)</li> <li>![](http://upload-images.jianshu.io/upload_images/1480597-c72819402fb928e8.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)</li> </ul> <ol id="btn"> <li class="active">1</li> <li>2</li> <li>3</li> <li>4</li> </ol> </div> <script src="http://7xq6al.com1.z0.glb.clouddn.com/Animate.min.js"></script> <script type="text/javascript"> var box = document.querySelector("#box"); var imgUl = document.querySelector("#imgBox"); var btns = document.querySelector("#btn").querySelectorAll("li"); var len = btns.length; var lenImg = imgUl.querySelectorAll("li").length; var index = 0; //控制img的索引 var cindex = 0;//控制按钮的索引 var timer = null; for (var i=0;i<len;i++) { (function(index){ btns[index].onmouseover = function(){ for (var j=0;j<len;j++){ btns[j].className = ""; } cindex = index;//保持索引同步 animateSpeed(imgUl,{"left":-970*index}); this.className = "active"; } })(i); } function autoPlay(){ index++; cindex++; cindex %=len;//限制长度 for (var j=0;j<len;j++){ btns[j].className = ""; } animateSpeed(imgUl,{"left":-970*index},function(){ if(index == lenImg-1){ this.style.left = 0; index = 0; } }); btns[cindex].className = "active"; } timer = setInterval(autoPlay,2000); box.onmouseover = function(){ clearInterval(timer); } box.onmouseout = function(){ timer = setInterval(autoPlay,2000); } </script> |
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*{ padding: 0; margin: 0; } body{ font-size: 14px; font-family: "微软雅黑"; } ul,li{ list-style: none; } #box { position: relative; width: 970px; height: 350px; margin: 30px auto; overflow: hidden; } #imgBox { width:1000%;/*自动计算百分比*/ position: absolute; left: 0; } #imgBox li{ width: 970px; height: 350px; float: left; } #imgBox li img { width: 970px; height: 350px; } #btn { width: 120px; position: absolute; right: 10px; bottom: 10px; } #btn li { width: 20px; height: 20px; line-height: 20px; border-radius: 50%; text-align: center; cursor: pointer; background: #fff; margin: 0 2px; float: left; } #btn li.active { background: #F17A5C; color: #fff; } |
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//速度版本 (function(win){ function move(obj,json,callback){ clearInterval(obj.timer); obj.timer = setInterval(function(){ var mark = true; for(var attr in json){ var cur = null; if(attr == "opacity"){ cur = getStyle(obj,attr)*100; }else{ //如果没写 默认填充成0 cur = parseInt(getStyle(obj,attr))||0; } var target = json[attr]; var speed = (target - cur)*0.2; speed = speed>0?Math.ceil(speed):Math.floor(speed); if(cur != target){ if(attr == "opacity"){ //IE opacity兼容问题 obj.style.filter = "alpha(opacity="+(cur+speed)+")"; obj.style[attr] = (cur + speed)/100; }else{ obj.style[attr] = cur + speed + "px"; } mark = false; }; } if(mark){ clearInterval(obj.timer); callback && callback.call(obj); } },1000/30); } win.animateSpeed = move; })(window); function getStyle(obj,attr){ return getComputedStyle(obj)[attr]?getComputedStyle(obj)[attr]:obj.currentStyle[attr]; } function getId(id){ return document.getElementById(id); } |
二、JavaScript运动框架之时间版
2.1 关于运动
- 速度的运动 通过速度来控制元素的 位移 / 折叠 / 淡入淡出
- 时间的运动 通过时间来控制元素的 位移 / 折叠 / 淡入淡出(jQuery)
- 时间的运动 基于一些数学公式 匀速运动 在路程的每一个点 速度都一样
2.2 一些案例演示
2.3 运动框架之时间版本-借助animate一些函数实现–综合完整版
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<div id="box2"></div> <div id="box3"></div> <div id="box4"></div> <div id="box5"></div> <script type="text/javascript"> //时间版本 getId("box2").onclick = function(){ animateTime(getId("box2"),{ "left":500, "opacity":100 },1000,"elasticOut",function(){ this.innerHTML = "我是时间版本"; }); } getId("box3").onclick = function(){ animateTime(getId("box3"),{ "left":500, "opacity":100 },1000,"backIn",function(){ this.innerHTML = "我是时间版本"; }); } getId("box4").onclick = function(){ animateTime(getId("box4"),{ "left":500, "opacity":100 },1000,"bounceIn",function(){ this.innerHTML = "我是时间版本"; }); } getId("box5").onclick = function(){ animateTime(getId("box5"),{ "left":500, "opacity":100 },1000,"bounceBoth",function(){ this.innerHTML = "我是时间版本"; }); } </script> |
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#box1,#box2,#box3,#box4,#box5 { position: relative; width: 100px; height: 100px; line-height: 100px; text-align: center; background: red; color: #fff; font-size: 12px; opacity: 0.5; filter:alpha(opcity=20);/**兼容IE*/ margin: 10px; } |
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/*t b c d t current time :nTime-sTime b begining time :curr c chang in value :变化量end-curr d duration :持续时间 time */ /** * * @param {Object} obj 元素对象 * @param {Object} json 多个属性 * @param {Object} time 变化时间 * @param {Object} prop 运动函数 * @param {Object} callback 回调函数 */ //时间版本 (function(win){ function move(obj,json,time,prop,callback){ //一般定时器结束后最好清除 clearInterval(obj.timer); var curr = {}; var end = {}; //通过for in 在上车前把所有东西装到包里 for(var attr in json){ if(attr == "opacity"){//opacity特殊东西特殊对待 curr[attr] = getStyle(obj,attr)*100;//化为整数好计算 }else{ curr[attr] = parseInt(getStyle(obj,attr))||0; } end[attr] = json[attr]; } //如果没写默认值 默认就是0 不然在IE出问题 //var curr = parseInt(getStyle(obj,attr))||0; //var end = target; var sTime = new Date();//开始时间T0 //开始变换了 obj.timer = setInterval(function(){ var nTime = new Date();//当前时间Tt var t = nTime -sTime; var d = time; //St = (Tt-T0)/Time*(S-S0)+S0 //(nTime-sTime)/time 比例最多为1 /*var prop = (nTime-sTime)/time; */ if(t >=d){ t = d; clearInterval(obj.timer); callback && callback.call(obj); } for(var attr in json){ var b = curr[attr]; var c = end[attr] - b; if(attr == "opacity"){ //var s = prop*(end[attr]-curr[attr])+curr[attr]; var s = Tween[prop](t,b,c,d); obj.style[attr] = s/100; obj.style.filter = "alpha(opacity="+s+")"; }else{ //var s = prop*(end[attr]-curr[attr])+curr[attr]; var s = Tween[prop](t,b,c,d); obj.style[attr] = s+"px"; } } },13); var Tween = { linear: function (t, b, c, d){ //匀速 return c*t/d + b; // t/d = prop; }, easeIn: function(t, b, c, d){ //加速曲线 return c*(t/=d)*t + b; }, easeOut: function(t, b, c, d){ //减速曲线 return -c *(t/=d)*(t-2) + b; }, easeBoth: function(t, b, c, d){ //加速减速曲线 if ((t/=d/2) < 1) { return c/2*t*t + b; } return -c/2 * ((--t)*(t-2) - 1) + b; }, easeInStrong: function(t, b, c, d){ //加加速曲线 return c*(t/=d)*t*t*t + b; }, easeOutStrong: function(t, b, c, d){ //减减速曲线 return -c * ((t=t/d-1)*t*t*t - 1) + b; }, easeBothStrong: function(t, b, c, d){ //加加速减减速曲线 if ((t/=d/2) < 1) { return c/2*t*t*t*t + b; } return -c/2 * ((t-=2)*t*t*t - 2) + b; }, elasticIn: function(t, b, c, d, a, p){ //正弦衰减曲线(弹动渐入) if (t === 0) { return b; } if ( (t /= d) == 1 ) { return b+c; } if (!p) { p=d*0.3; } 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; }, elasticOut: function(t, b, c, d, a, p){ //正弦增强曲线(弹动渐出) if (t === 0) { return b; } if ( (t /= d) == 1 ) { return b+c; } if (!p) { p=d*0.3; } 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; }, elasticBoth: function(t, b, c, d, a, p){ if (t === 0) { return b; } if ( (t /= d/2) == 2 ) { return b+c; } if (!p) { p = d*(0.3*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 - 0.5*(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 )*0.5 + c + b; }, backIn: function(t, b, c, d, s){ //回退加速(回退渐入) if (typeof s == ‘undefined‘) { s = 1.70158; } return c*(t/=d)*t*((s+1)*t - s) + b; }, backOut: function(t, b, c, d, s){ if (typeof s == ‘undefined‘) { s = 3.70158; //回缩的距离 } return c*((t=t/d-1)*t*((s+1)*t + s) + 1) + b; }, backBoth: function(t, b, c, d, s){ if (typeof 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; }, bounceIn: function(t, b, c, d){ //弹球减振(弹球渐出) return c - Tween[‘bounceOut‘](d-t, 0, c, d) + b; }, bounceOut: 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 + 0.75) + b; } else if (t < (2.5/2.75)) { return c*(7.5625*(t-=(2.25/2.75))*t + 0.9375) + b; } return c*(7.5625*(t-=(2.625/2.75))*t + 0.984375) + b; }, bounceBoth: function(t, b, c, d){ if (t < d/2) { return Tween[‘bounceIn‘](t*2, 0, c, d) * 0.5 + b; } return Tween[‘bounceOut‘](t*2-d, 0, c, d) * 0.5 + c*0.5 + b; } }; } win.animateTime = move; })(window); |
三、运动框架之时间速度版完整封装
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/*t b c d t current time :nTime-sTime b begining time :curr c chang in value :变化量end-curr d duration :持续时间 time */ /** * * @param {Object} obj 元素对象 * @param {Object} json 多个属性 * @param {Object} time 变化时间 * @param {Object} prop 运动函数 * @param {Object} callback 回调函数 */ //时间版本 (function(win){ function move(obj,json,time,prop,callback){ //一般定时器结束后最好清除 clearInterval(obj.timer); var curr = {}; var end = {}; //通过for in 在上车前把所有东西装到包里 for(var attr in json){ if(attr == "opacity"){//opacity特殊东西特殊对待 curr[attr] = getStyle(obj,attr)*100;//化为整数好计算 }else{ curr[attr] = parseInt(getStyle(obj,attr))||0; } end[attr] = json[attr]; } //如果没写默认值 默认就是0 不然在IE出问题 //var curr = parseInt(getStyle(obj,attr))||0; //var end = target; var sTime = new Date();//开始时间T0 //开始变换了 obj.timer = setInterval(function(){ var nTime = new Date();//当前时间Tt var t = nTime -sTime; var d = time; //St = (Tt-T0)/Time*(S-S0)+S0 //(nTime-sTime)/time 比例最多为1 /*var prop = (nTime-sTime)/time; */ if(t >=d){ t = d; clearInterval(obj.timer); callback && callback.call(obj); } for(var attr in json){ var b = curr[attr]; var c = end[attr] - b; if(attr == "opacity"){ //var s = prop*(end[attr]-curr[attr])+curr[attr]; var s = Tween[prop](t,b,c,d); obj.style[attr] = s/100; obj.style.filter = "alpha(opacity="+s+")"; }else{ //var s = prop*(end[attr]-curr[attr])+curr[attr]; var s = Tween[prop](t,b,c,d); obj.style[attr] = s+"px"; } } },13); var Tween = { linear: function (t, b, c, d){ //匀速 return c*t/d + b; // t/d = prop; }, easeIn: function(t, b, c, d){ //加速曲线 return c*(t/=d)*t + b; }, easeOut: function(t, b, c, d){ //减速曲线 return -c *(t/=d)*(t-2) + b; }, easeBoth: function(t, b, c, d){ //加速减速曲线 if ((t/=d/2) < 1) { return c/2*t*t + b; } return -c/2 * ((--t)*(t-2) - 1) + b; }, easeInStrong: function(t, b, c, d){ //加加速曲线 return c*(t/=d)*t*t*t + b; }, easeOutStrong: function(t, b, c, d){ //减减速曲线 return -c * ((t=t/d-1)*t*t*t - 1) + b; }, easeBothStrong: function(t, b, c, d){ //加加速减减速曲线 if ((t/=d/2) < 1) { return c/2*t*t*t*t + b; } return -c/2 * ((t-=2)*t*t*t - 2) + b; }, elasticIn: function(t, b, c, d, a, p){ //正弦衰减曲线(弹动渐入) if (t === 0) { return b; } if ( (t /= d) == 1 ) { return b+c; } if (!p) { p=d*0.3; } 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; }, elasticOut: function(t, b, c, d, a, p){ //正弦增强曲线(弹动渐出) if (t === 0) { return b; } if ( (t /= d) == 1 ) { return b+c; } if (!p) { p=d*0.3; } 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; }, elasticBoth: function(t, b, c, d, a, p){ if (t === 0) { return b; } if ( (t /= d/2) == 2 ) { return b+c; } if (!p) { p = d*(0.3*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 - 0.5*(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 )*0.5 + c + b; }, backIn: function(t, b, c, d, s){ //回退加速(回退渐入) if (typeof s == ‘undefined‘) { s = 1.70158; } return c*(t/=d)*t*((s+1)*t - s) + b; }, backOut: function(t, b, c, d, s){ if (typeof s == ‘undefined‘) { s = 3.70158; //回缩的距离 } return c*((t=t/d-1)*t*((s+1)*t + s) + 1) + b; }, backBoth: function(t, b, c, d, s){ if (typeof 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; }, bounceIn: function(t, b, c, d){ //弹球减振(弹球渐出) return c - Tween[‘bounceOut‘](d-t, 0, c, d) + b; }, bounceOut: 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 + 0.75) + b; } else if (t < (2.5/2.75)) { return c*(7.5625*(t-=(2.25/2.75))*t + 0.9375) + b; } return c*(7.5625*(t-=(2.625/2.75))*t + 0.984375) + b; }, bounceBoth: function(t, b, c, d){ if (t < d/2) { return Tween[‘bounceIn‘](t*2, 0, c, d) * 0.5 + b; } return Tween[‘bounceOut‘](t*2-d, 0, c, d) * 0.5 + c*0.5 + b; } }; } win.animateTime = move; })(window); //速度版本 (function(win){ function move(obj,json,callback){ clearInterval(obj.timer); obj.timer = setInterval(function(){ var mark = true; for(var attr in json){ var cur = null; if(attr == "opacity"){ cur = getStyle(obj,attr)*100; }else{ //如果没写 默认填充成0 cur = parseInt(getStyle(obj,attr))||0; } var target = json[attr]; var speed = (target - cur)*0.2; speed = speed>0?Math.ceil(speed):Math.floor(speed); if(cur != target){ if(attr == "opacity"){ //IE opacity兼容问题 obj.style.filter = "alpha(opacity="+(cur+speed)+")"; obj.style[attr] = (cur + speed)/100; }else{ obj.style[attr] = cur + speed + "px"; } mark = false; }; } if(mark){ clearInterval(obj.timer); callback && callback.call(obj); } },1000/30); } win.animateSpeed = move; })(window); function getStyle(obj,attr){ return getComputedStyle(obj)[attr]?getComputedStyle(obj)[attr]:obj.currentStyle[attr]; } function getId(id){ return document.getElementById(id); } |
- 更多使用记录,详情 https://github.com/poetries/Animate
from:http://blog.poetries.top/2017/01/12/js-animate/?utm_source=tuicool&utm_medium=referral