原生javascript圖片自動或手動切換示例附演示源碼

更新時間：2013年09月04日 15:32:50 作者：

圖片自動或手動切換，想必會在很多地方有見過吧，本文將為大家介紹的是使用原生javascript實(shí)現(xiàn)的焦點(diǎn)圖切換，感興趣的朋友可以參考下

一、效果圖

二、html代碼

復(fù)制代碼代碼如下:

 
<style type="text/css"> 
.container, .container *{margin:0; padding:0;} 

.container{width:408px; height:168px; overflow:hidden;position:relative;} 

.slider{position:absolute;} 
.slider li{ list-style:none;display:inline;} 
.slider img{ width:408px; height:168px; display:block;} 

.slider2{width:2000px;} 
.slider2 li{float:left;} 

.num{ position:absolute; right:5px; bottom:5px;} 
.num li{ 
float: left; 
color: #FF7300; 
text-align: center; 
line-height: 16px; 
width: 16px; 
height: 16px; 
font-family: Arial; 
font-size: 12px; 
cursor: pointer; 
overflow: hidden; 
margin: 3px 1px; 
border: 1px solid #FF7300; 
background-color: #fff; 
} 
.num li.on{ 
color: #fff; 
line-height: 21px; 
width: 21px; 
height: 21px; 
font-size: 16px; 
margin: 0 1px; 
border: 0; 
background-color: #FF7300; 
font-weight: bold; 
} 
</style> 
<div class="container" id="idTransformView2"> 
<ul class="slider slider2" id="idSlider2"> 
<li><img src="images/01.jpg"/></li> 
<li><img src="images/02.jpg"/></li> 
<li><img src="images/03.jpg"/></li> 
</ul> 
<ul class="num" id="idNum2"> 
<li>1</li> 
<li>2</li> 
<li>3</li> 
</ul> 
</div> 

三、源代碼

復(fù)制代碼代碼如下:

 
var $ = function (id) { 
return "string" == typeof id ? document.getElementById(id) : id; 
}; 

var Class = { 
create: function() { 
return function() { 
this.initialize.apply(this, arguments); 
} 
} 
} 

Object.extend = function(destination, source) { 
for (var property in source) { 
destination[property] = source[property]; 
} 
return destination; 
} 

var TransformView = Class.create(); 
TransformView.prototype = { 
//容器對象,滑動對象,切換參數(shù),切換數(shù)量 
initialize: function(container, slider, parameter, count, options) { 
if(parameter <= 0 || count <= 0) return; 
var oContainer = $(container), oSlider = $(slider), oThis = this; 

this.Index = 0;//當(dāng)前索引 

this._timer = null;//定時器 
this._slider = oSlider;//滑動對象 
this._parameter = parameter;//切換參數(shù) 
this._count = count || 0;//切換數(shù)量 
this._target = 0;//目標(biāo)參數(shù) 

this.SetOptions(options); 

this.Up = !!this.options.Up; 
this.Step = Math.abs(this.options.Step); 
this.Time = Math.abs(this.options.Time); 
this.Auto = !!this.options.Auto; 
this.Pause = Math.abs(this.options.Pause); 
this.onStart = this.options.onStart; 
this.onFinish = this.options.onFinish; 

oContainer.style.overflow = "hidden"; 
oContainer.style.position = "relative"; 

oSlider.style.position = "absolute"; 
oSlider.style.top = oSlider.style.left = 0; 
}, 
//設(shè)置默認(rèn)屬性 
SetOptions: function(options) { 
this.options = {//默認(rèn)值 
Up: true,//是否向上(否則向左) 
Step: 5,//滑動變化率 
Time: 10,//滑動延時 
Auto: true,//是否自動轉(zhuǎn)換 
Pause: 2000,//停頓時間(Auto為true時有效) 
onStart: function(){},//開始轉(zhuǎn)換時執(zhí)行 
onFinish: function(){}//完成轉(zhuǎn)換時執(zhí)行 
}; 
Object.extend(this.options, options || {}); 
}, 
//開始切換設(shè)置 
Start: function() { 
if(this.Index < 0){ 
this.Index = this._count - 1; 
} else if (this.Index >= this._count){ this.Index = 0; } 

this._target = -1 * this._parameter * this.Index; 
this.onStart(); 
this.Move(); 
}, 
//移動 
Move: function() { 
clearTimeout(this._timer); 
var oThis = this, style = this.Up ? "top" : "left", 
iNow = parseInt(this._slider.style[style]) || 0, 
iStep = this.GetStep(this._target, iNow); 

if (iStep != 0) { 
this._slider.style[style] = (iNow + iStep) + "px"; 
this._timer = setTimeout(function(){ oThis.Move(); }, this.Time); 
} else { 
this._slider.style[style] = this._target + "px"; 
this.onFinish(); 
if (this.Auto) { this._timer = setTimeout(function(){ oThis.Index++; oThis.Start(); }, this.Pause); } 
} 
}, 
//獲取步長 
GetStep: function(iTarget, iNow) { 
var iStep = (iTarget - iNow) / this.Step; 
if (iStep == 0) return 0; 
if (Math.abs(iStep) < 1) return (iStep > 0 ? 1 : -1); 
return iStep; 
}, 
//停止 
Stop: function(iTarget, iNow) { 
clearTimeout(this._timer); 
this._slider.style[this.Up ? "top" : "left"] = this._target + "px"; 
} 
}; 

window.onload=function(){ 
function Each(list, fun){ 
for (var i = 0, len = list.length; i < len; i++) { fun(list[i], i); } 
}; 

var objs = $("idNum2").getElementsByTagName("li"); 

var tv = new TransformView("idTransformView2", "idSlider2", 408, 3, { 
onStart: function(){ Each(objs, function(o, i){ o.className = tv.Index == i ? "on" : ""; }) },//按鈕樣式 
Up: false 
}); 

tv.Start(); 

Each(objs, function(o, i){ 
o.onmouseover = function(){ 
o.className = "on"; 
tv.Auto = false; 
tv.Index = i; 
tv.Start(); 
} 
o.onmouseout = function(){ 
o.className = ""; 
tv.Auto = true; 
tv.Start(); 
} 
}) 
} 