JavaScript實現圖片滑動切換的程式碼範例分享，javascript樣本

JavaScript實現圖片滑動切換的程式碼範例分享，javascript樣本

假設我們這裡有1到5五張bmp圖片，那麼控製圖片切換顯示的核心代碼可以為：

<script> var i=1; var img = new Array(); img[0] = "1.bmp"; img[1] = "2.bmp"; img[2] = "3.bmp"; img[3] = "4.bmp"; img[4] = "5.bmp"; function playImg(){ i=i+1; var imgs = document.getElementById("img"); imgs.src =img[i]; if(i>=4){ i=1; } } window.onload = function(){ document.getElementById("img").src="1.bmp"; }</script><img id="img" src="" width="500" hieght="500" onclick="playImg()" style="cursor:pointer;">

主要體現了一個圖片的切換控制思路，可以用於各種情境，那麼下面我們來看一個複雜一些的實現，能夠控制滑動和停頓事件等具體的實現圖片的滑動轉場效果的例子：

var $$ = 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 forEach = function(array, callback, thisObject){if(array.forEach){ array.forEach(callback, thisObject);}else{ for (var i = 0, len = array.length; i < len; i++) { callback.call(thisObject, array[i], i, array); }}}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; } }}}//容器物件,滑動對象,切換數量var SlideTrans = function(container, slider, count, options) {this._slider =(slider);this.container=(container);//容器物件this._timer = null;//定時器this._count = Math.abs(count);//切換數量this._target = 0;//目標值this._t = this._b = this._c = 0;//tween參數this.Index = 0;//當前索引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//樣式設定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 = { //設定預設屬性 SetOptions: function(options) {this.options = {//預設值 Vertical: true,//是否垂直方向（方向不能改） Auto: true,//是否自動 Change: 0,//改變數 Duration: 30,//滑動期間 Time: 10,//滑動延時 Pause: 3000,//停頓時間(Auto為true時有效) onStart: function(){},//開始轉換時執行 onFinish: function(){},//完成轉換時執行 Tween: Tween.Quart.easeOut//tween運算元};Extend(this.options, options || {}); }, //開始切換 Run: function(index) {//修正indexindex == undefined && (index = this.Index);index < 0 && (index = this._count - 1) || index >= this._count && (index = 0);//設定參數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(); }, //移動 Move: function() {clearTimeout(this._timer);//未到達目標繼續移動否則進行下一次滑動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));} }, //移動到 MoveTo: function(i) {this._slider.style[this._css] = i + "px"; }, //下一個 Next: function() {this.Run(++this.Index); }, //上一個 Previous: function() {this.Run(--this.Index); }, //停止 Stop: function() {clearTimeout(this._timer); this.MoveTo(this._target); }};

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