JS实现的相册图片左右滚动完整实例

2019独角兽企业重金招聘Python工程师标准>>>

本文实例讲述了JS实现的相册图片左右滚动效果。分享给大家供大家参考，具体如下：

执行左移右移函数：

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var $get = function(id) {   return "string" == typeof id ? document.getElementById(id) : id; }; var Extend = function(destination, source) {   for (var property in source) {     destination[property] = source[property];   }   return destination; } var CurrentStyle = function(element) {   return element.currentStyle || document.defaultView.getComputedStyle(element, null); } var Bind = function(object, fun) {   var args = Array.prototype.slice.call(arguments).slice(2);   return function() {     return fun.apply(object, args.concat(Array.prototype.slice.call(arguments)));   } } var Tween = {   Quart: {     easeOut: function(t, b, c, d) {       return -c * ((t = t / d - 1) * t * t * t - 1) + b;     }   },   Back: {     easeOut: 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;     }   },   Bounce: {     easeOut: 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;       }     }   } } //容器对象,滑动对象,切换数量 var SlideTrans = function(container, slider, count, options) {   this._slider = $get(slider);   this._container = $get(container); //容器对象   this._timer = null; //定时器   this._count = Math.abs(count); //切换数量   this._target = 0; //目标值   this._t = this._b = this._c = 0; //tween参数   this.Index = 0; //当前索引   this.SetOptions(options);   this.Auto = !!this.options.Auto;   this.Duration = Math.abs(this.options.Duration);   this.Time = Math.abs(this.options.Time);   this.Pause = Math.abs(this.options.Pause);   this.Tween = this.options.Tween;   this.onStart = this.options.onStart;   this.onFinish = this.options.onFinish;   var bVertical = !!this.options.Vertical;   this._css = bVertical ? "top" : "left"; //方向   //样式设置   var p = CurrentStyle(this._container).position;   p == "relative" || p == "absolute" || (this._container.style.position = "relative");   this._container.style.overflow = "hidden";   this._slider.style.position = "absolute";   this.Change = this.options.Change ? this.options.Change :     this._slider[bVertical ? "offsetHeight" : "offsetWidth"] / this._count; }; SlideTrans.prototype = {   //设置默认属性   SetOptions: function(options) {     this.options = {//默认值     Vertical: true, //是否垂直方向（方向不能改）       Auto: false, //是否自动       Change: 0, //改变量       Duration: 50, //滑动持续时间       Time: 10, //滑动延时       Pause: 2000, //停顿时间(Auto为true时有效)       onStart: function() { }, //开始转换时执行       onFinish: function() { }, //完成转换时执行       Tween: Tween.Quart.easeOut//tween算子     };     Extend(this.options, options || {});   },   //开始切换   Run: function(index) {     //修正index     index == undefined && (index = this.Index);     index < 0 && (index = this._count - 1) || index >= this._count && (index = 0);     //设置参数     this._target = -Math.abs(this.Change) * (this.Index = index);     this._t = 0;     this._b = parseInt(CurrentStyle(this._slider)[this.options.Vertical ? "top" : "left"]);     this._c = this._target - this._b;     this.onStart();     this.Move();   },   //移动   Move: function() {     clearTimeout(this._timer);     //未到达目标继续移动否则进行下一次滑动     if (this._c && this._t < this.Duration) {       this.MoveTo(Math.round(this.Tween(this._t++, this._b, this._c, this.Duration)));       this._timer = setTimeout(Bind(this, this.Move), this.Time);     } else {       this.MoveTo(this._target);       this.Auto && (this._timer = setTimeout(Bind(this, this.Next), this.Pause));     }   },   //移动到   MoveTo: function(i) {     this._slider.style[this._css] = i + "px";   },   //下一个   Next: function() {     this.Run(++this.Index);   },   //上一个   Previous: function() {     this.Run(--this.Index);   },   //停止   Stop: function() {     clearTimeout(this._timer); this.MoveTo(this._target);   } };

在前天html加入div容器：

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<!-- Icon scroll begin --> <div style="text-align:center; width:100%; margin:auto auto">   <div class="container" id="idContainer" runat="server" >   </div> </div> <!--end--> <!--左右滚动按钮--> <div class="defaultprenext"> <table cellpadding=0 cellspacing=0 style="width:100%">  <tr>    <td style="width:40%; text-align:left; padding-left:6px">    <img id="ImgPre" alt="" src="ImageV3/Default/pre-gray.png" />    <span class="pager" id="Pre" style="color:Gray">Pre</span></td>    <td style="width:20%; text-align:center">      <div class="defaultprenextmid">       <div style="height:10px; vertical-align:middle; line-height:10px">        <img src="ImageV3/Default/greendot.png" id="Img1" />          <img src="ImageV3/Default/graydot.png" id="Img2" />          <img src="ImageV3/Default/graydot.png" id="Img3" />       </div>     </div>    </td>    <td style="width:40%; text-align:right; padding-right:6px">     <span class="pager" id="Next" style="color:#2f6417">Next</span>     <img id="ImgNext" alt="" src="ImageV3/Default/next-green.png" />    </td>  </tr> </table> </div>

下面是改变左右按钮可用状态

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var imgNum = $get("idContainer").getElementsByTagName("img").length; var pre = $get("Pre"); var next = $get("Next"); var i = 0; if (imgNum > 0) {   var st = new SlideTrans("idContainer", "idSlider", 3, { Vertical: false });   if (i < 2) {     $get("Next").onclick = function() {       if (i < 2) {         st.Next();         i++;         if (i == 1) {           $get("ImgPre").src = "ImageV3/Default/pre-green.png";           pre.style.color = "#2f6417";         }         if (i == 2) {           $get("ImgNext").src = "ImageV3/Default/next-gray.png";           next.style.color = "Gray";         }         ChangePicIndex(i);       }     }   }   $get("Pre").onclick = function() {     if (i > 0) {       st.Previous();       $get("ImgNext").src = "ImageV3/Default/next-green.png";       next.style.color = "#2f6417";       i--;       if (i == 0) {         $get("ImgPre").src = "ImageV3/Default/pre-gray.png";         pre.style.color = "Gray";       }       ChangePicIndex(i);     }   }   st.Run(); } function ChangePicIndex(index) {   switch (index) {     case 1:       $get("Img1").src = "ImageV3/Default/graydot.png";       $get("Img2").src = "ImageV3/Default/greendot.png";       $get("Img3").src = "ImageV3/Default/graydot.png";       break     case 2:       $get("Img1").src = "ImageV3/Default/graydot.png";       $get("Img2").src = "ImageV3/Default/graydot.png";       $get("Img3").src = "ImageV3/Default/greendot.png";       break     default:       $get("Img1").src = "ImageV3/Default/greendot.png";       $get("Img2").src = "ImageV3/Default/graydot.png";       $get("Img3").src = "ImageV3/Default/graydot.png";   } }

转载于:https://my.oschina.net/u/3063271/blog/793377