一个仿腾讯娱乐频道焦点图轮播的插件
ui3g.js
代码如下:
/*
顶部大图滚动
*/
var slide = (function() {
var quadEaseOut;
var doc = document;
var $ = function(s){
return document.getElementById(s);
}
/**
获取索引值，工具类
@param {Element} current 当前元素
@param {Object} obj 元素集合
**/
var getIndex = function(current, obj) {
for (var i=0; i
if (obj[i] == current) {
return i;
}
}
};
/**
@param {Element} el 目标元素
**/
var siblings = function(el) {
var r = [],
n = el.parentNode.firstChild;
for ( ; n; n = n.nextSibling ) {
if ( n.nodeType === 1 && n !== el ) {
r.push( n );
}
}
return r;
};
/**
设置 Slide 宽高
@param {Element} el Slide 元素
@param {Number} width Slide 宽度
@param {Number} height Slide 高度
**/
var setSlideWH = function(el, width, height) {
var styleW,
styleH;
if (width == '100%') { // 自适应宽度
styleW = '100%';
} else { // 定宽
styleW = width + 'px';
}
if (height == '100%') { // 自适应高度
styleH = '100%';
} else { // 定高
styleH = height + 'px';
}
el.style.width = styleW;
el.style.height = styleH;
};
var readStyle = function(obj, name){
if(obj.style[name]){
return obj.style[name];
}else if(obj.currentStyle){
return obj.currentStyle[name]
}else if(document.defaultView && document.defaultView.getComputedStyle){
var d=document.defaultView.getComputedStyle(obj,null);
return d.getPropertyValue(name)
}else{
return null
}
};
var style = {
setOpacity : function(obj,opacity){
if(typeof(obj.style.opacity) != 'undefined'){
obj.style.opacity = opacity;
}else{
obj.style.filter = 'Alpha(Opacity=' + (opacity*100) + ')';
};
}
};
/* 动画 */
var extend = {
/**
渐显元素
@param {Element} target 目标元素
**/
fadeIn : function(obj,time){
if(readStyle(obj, 'display') == 'none'){
obj.style.display = 'block';
};
style.setOpacity(obj,0);
time = time || 200;
var opacity = 0,step = time / 20;
clearTimeout(obj.showT);
obj.showT = setTimeout(function(){
if(opacity >= 1) { style.setOpacity(obj,1); return; }
opacity +=1/step;
style.setOpacity(obj,opacity);
obj.showT = setTimeout(arguments.callee,20);
},20);
},
/**
渐隐元素
@param {Element} target 目标元素
**/
fadeOut : function(obj,time){
time = time || 200;
style.setOpacity(obj,1);
var opacity = 1,step = time / 20;
clearTimeout(obj.showT);
obj.showT = setTimeout(function(){
if(opacity <= 0){
obj.style.display = 'none';
style.setOpacity(obj,0);
return;
};
opacity -= 1/step;
obj.showT = setTimeout(arguments.callee,20);
},20);
},
/**
动画元素
@param {Element} target 目标元素
@param {String} key target样式
@param {Number} start key初始值
@param {Number} end key结束值
@param {Number} speed 速度
@param {Function} endFn 结束时的回调
@param {String} u 样式单位
**/
actPX : function(obj,key,start,end,speed,endFn,u){
if(typeof(u) == 'undefined'){u = 'px'};
clearTimeout(obj['_extend_actPX' + key.replace(/\-\.\=/,'_') + '_timeOut']);
if(start > end){
speed = - Math.abs(speed);
}else{
speed = Math.abs(speed);
};
var now = start;
var length = end - start;
obj['_extend_actPX' + key.replace(/\-\.\=/,'_') + '_timeOut'] = setTimeout(function(){
now += speed;
var space = end - now;
if(start < end){
if(space < length/3){
speed = Math.ceil(space/3);
};
if(space <= 0){
obj[key] = end + u;
if(endFn){endFn()};
return;
};
}else{
if(space > length/3){
speed = Math.floor(space/3);
};
if(space >= 0){
obj[key] = end + u;
if(endFn){endFn()};
return;
};
};
obj[key] = now + u;
obj['_extend_actPX' + key.replace(/\-\.\=/,'_') + '_timeOut'] = setTimeout(arguments.callee,20);
},20);
}
}
/**
配置
**/
var config = {
imgData: [], // 初使化图片信息
imgTargetId: '', // 初使化 Slide 目标 ID
imgWidth: '100%', // 初使化图片宽度
imgHeight: '100%', // 初使化图片高度
imgAuto: false, // 初使化自动播放
imgInterval: 3000, // 初使化间隔时间
imgDataLen: 0, // 初使化图片数量
goSwitch: true, // 鼠标悬停时切换状态
index: 4, // 焦点所在索引值
_index: 0,
curImg: 5,
indexShow : 5
};
/**
生成并插入 Slide 结构
**/
var buildSlide = function() {
// 注入 Slide 结构
var panelHtml = $('_slide').getElementsByTagName('ul')[0].innerHTML;
var aLi = $('_slide').getElementsByTagName('ul')[0].getElementsByTagName('li');
$('_slide').getElementsByTagName('ul')[0].innerHTML = panelHtml + panelHtml;
// 设置宽高
setSlideWH($(config.imgTargetId), config.imgWidth, config.imgHeight);
$('_slide').getElementsByTagName('ul')[0].style.left = '-' + aLi[0].offsetWidth * 4 + 'px';
};
quadEaseOut = function (t, b, c, d, s) {
return -c *(t/=d)*(t-2) + b;
};
var move = function(){
//var e = this;
clearTimeout(config.timer),
config.t < 50 ? (boxMoveTo(Math.round(quadEaseOut(config.t += 3, config.b, config.c, 50))), config.timer=setTimeout(function(){move()}, 30)) : boxMoveTo(config.target)
}
var boxMoveTo = function(e){
$('slide_list').style.left = e+"px"
}
//var dotNum = 0;
var d = false;
var run = function(e, t){
var slideList = $('slide_list').getElementsByTagName('li');
dotList = $("focus_dot").getElementsByTagName('li');
slideList[config._index].className = '';
for(var i=0; i
slideList[i].className = '';
slideList[i].getElementsByTagName("p")[0].style.display = 'none';
}
for(var i=0; i
dotList[i].className = '';
}
e = e < 0 ? config.imgData - 1 : e > config.imgData ? 1 : e,
config.target = -Math.abs(slideList[0].offsetWidth)*(config.index = e),
config.t = 0,
config.b = t ? config.target - slideList[0].offsetWidth : config.target + slideList[0].offsetWidth,
config.c = config.target - config.b,
move();
config.curImg = config.index + 1 > 6 ? 1 : (config.index + 1);
slideList[config.curImg].className = 'cur';
var dotN = 0;
if(config.index >= 4){
dotN = config.index - 4;
}else{
dotN = config.curImg;
}
dotList[dotN].className = "current";
slideList[config.curImg].getElementsByTagName("p")[0].style.display = 'block';
config._index = config.curImg;
}
/**
自动切换
**/
var b = false, c = false, timerA = null;
var autoSwitch = function() {
var slideList = $('slide_list').getElementsByTagName('li');
// 遍历触发器
for (var i=0; i
// 找到当前触发器
if (slideList[i].className == 'cur') {
// 获得当前触发器的索引
config.index = getIndex(slideList[i], slideList);
}
}
var autoFun = function() {
if (config.goSwitch) {
config.index = config.index == 5 ? 0 : config.index;
if(!b){
b = true;
config.index = 0;
}
if(config.index == 3 && !c){
clearInterval(timerA);
timerA = setInterval(autoFun, 10000);
c = true;
}else if(c){
c = false;
clearInterval(timerA);
timerA = setInterval(autoFun, config.imgInterval);
}
//console.log(config.index);
run(config.index, !1);
config.index += 1;
}
};
timerA = setInterval(autoFun, config.imgInterval);
};
/**
手指事件
**/
var touchFun = function(evt){
var $ = function(o){ return document.querySelector(o)}, $$ = function(o){ return document.querySelectorAll(o)}, touchInfo = {startX:0, endX:0}, slide = $('#slide'), btnL = $('#sliderL'), btnR = $('#sliderR');
slide.addEventListener('touchstart', function(evt) {
evt.preventDefault();
if(evt.changedTouches.length == 0) return;
touchInfo.startX = evt.changedTouches[0].pageX;
}, false);
slide.addEventListener('touchend', function(evt) {
evt.preventDefault();
if(evt.changedTouches.length == 0) return;
touchInfo.endX = evt.changedTouches[0].pageX;
var offset = touchInfo.endX - touchInfo.startX;
if(offset < 0) {
run(++config.index, !1)
} else if(offset > 0) {
run(--config.index, !0)
}else{
if(evt.target.parentNode.parentNode.className == 'cur'){
window.open(evt.target.parentNode.getAttribute('href'), '_blank');
}else{
return;
}
}
},false);
btnL.addEventListener('touchend', function() {run(++config.index, !1)}, false)
btnR.addEventListener('touchend', function() {run(--config.index, !0)}, false)
};
return {
init: function(obj, e) {
// 获取配置信息
config.imgData = obj.data; // 设置图片信息
config.imgTargetId = obj.targetId; // 设置 Slide 目标 ID
config.imgWidth = obj.width || config.imgWidth; // 设置图片宽度
config.imgHeight = obj.height || config.imgHeight; // 设置图片高度
config.imgAuto = obj.auto || config.imgAuto; // 设置自动播放
config.imgInterval = obj.interval || config.imgInterval;// 设置间隔时间
//config.imgDataLen = config.imgData.length; // 设置图片数量
// 生成 Slide 结构
buildSlide();
var slideList = $('slide_list').getElementsByTagName('li');
$('slide_list').style.width = slideList[0].offsetWidth*slideList.length + 'px';
slideList[config.curImg].className = 'cur';
var btnL = $('sliderL'), btnR = $('sliderR'), btnClose = $('slidClosed');
btnR.onclick = function(){
clearInterval(timerA);
config.index += 1;
run(config.index, !1)
}
btnL.onclick = function(){
clearInterval(timerA);
config.index -= 1;
run(config.index, !0)
}
$('slide').onmouseover = function(event){
config.index = Math.ceil(Math.abs(parseInt($('_slide').getElementsByTagName('ul')[0].style.left)/slideList[0].offsetWidth));
clearInterval(timerA);
timerA = null;
event.stopPropagation();
}
$('slide').onmouseout = function(event){
if (config.imgAuto) {
autoSwitch();
}
config.index = config.curImg;
event.stopPropagation();
}
if(/ipad;/i.test(navigator.userAgent.toLowerCase())){
touchFun(e);
}
// 自动切换
if (config.imgAuto) {
autoSwitch();
}
dotList = $("focus_dot").getElementsByTagName('li');
var n;
for(n = 0; n < dotList.length; n++ ){
dotList[n].index = n;
dotList[n].onclick = function() {
if(config.curImg == this.index || config.curImg == this.index + 5) return;
var n = 0;
n = config.curImg > 4 ? 0 : config.curImg;
if(this.index > n){
run(this.index-1, !1);
}else{
run(this.index-1, !0)
}
config.curImg = this.index;
}
}
}
}
})();
html
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