javascript中的輪播圖插件化的封裝範例
- 黄舟原創
- 2017-07-17 16:16:341216瀏覽
本文實例為大家分享了js輪播圖的外掛程式封裝程式碼，供大家參考，具體內容如下
具體程式碼如下:
~function(){
function AutoBanner(curEleId,ajaxURL,interval){
//把之前存储获取元素的变量都作为当前实例的私有属性
this.banner = document.getElementById(curEleId);
this.bannerInner = utils.firstChild(this.banner);
this.bannerTip = utils.children(this.banner,"ul")[0];
this.bannerLink = utils.children(this.banner,'a');
this.bannerLeft = this.bannerLink[0];
this.bannerRight = this.bannerLink[1];
this.pList = this.bannerInner.getElementsByTagName('p');
this.imgList = this.bannerInner.getElementsByTagName('img');
this.oLis = this.bannerTip.getElementsByTagName('li');
//之前的全局变量也应该变为自己的私有属性
this.jsonData = null;
this.interval = interval || 3000;
this.autoTimer = null;
this.step = 0;
this.ajaxURL = ajaxURL;
//返回当前实例
return this.init();
}
AutoBanner.prototype = {
constructor:AutoBanner,
//Ajax请求数据
getData:function(){
var _this = this;
var xhr = new XMLHttpRequest;
xhr.open("get",this.ajaxURL + "?_="+Math.random(),false);
xhr.onreadystatechange = function(){
if(xhr.readyState ===4 && /^2\d{2}$/.test(xhr.status)){
_this.jsonData = utils.formatJSON(xhr.responseText)
}
}
xhr.send(null)
},
//实现数据绑定
bindData:function(){
var str = "",str2 = "";
if(this.jsonData){
for(var i = 0,len=this.jsonData.length;i<len;i++){
var curData = this.jsonData[i];
str+='<p><img src="" alt="" trueImg="'+curData['img']+'"></p>';
i===0?str2+="<li class='bg'></li>":str2+="<li></li>"
}
}
this.bannerInner.innerHTMl = str;
this.bannerTip.innerHTML = str2;
},
//延迟加载
lazyImg:function(){
var _this = this;
for(var i = 0,len = this.imgList.length;i<len;i++){
~function(i){
var curImg = _this.imgList[i];
var oImg = new Image;
oImg.src = curImg.getAttribute('trueImg');
oImg.onload = function(){
curImg.src = this.src;
curImg.style.display = block;
//只对第一张处理
if(i===0){
var curp = curImg.parentNode;
curp.style.zIndex = 1;
myAnimate(curp,{opacity:1},200);
}
oImg = null;
}
}(i)
}
},
//自动轮播
autoMove:function(){
if(this.step === this.jsonData.length-1){
this.step = -1
}
this.step++;
this.setBanner();
},
//切换效果和焦点对齐
setBanner:function(){
for(var i = 0,len = this.pList.length;i<len;i++){
var curp = this.pList[i];
if(i===this.step){
utils.css(curp,"zIndex",1)
//2、让当前的透明度从0变为1,当动画结束，我们需要让其他的p的透明度的值直接变为0
myAnimate(curp,{opacity:1},200,function(){
var curpSib = utils.siblings(this);
for(var k = 0,len = curpSib.length;k<len;k++){
utils.css(curpSib[k],'opacity',0)
}
})
continue
}
utils.css(curp,"zIndex",0)
}
//实现焦点对其
for(i = 0,len = this.oLis.length;i<len;i++){
var curLi = this.oLis[i];
i === this.step?utils.addClass(curLi,"bg"):utils.removeClass(curLi,"bg");
}
},
//控制自动轮播
mouseEvent:function(){
var _this = this;
this.banner.onmouseover = function(){
window.clearInterval(_this.autoTimer);
_this.bannerLeft.style.display = _this.bannerRight.style.display = "block"
}
this.banner.onmouseout = function(){
_this.autoTimer = window.setInterval(function(){
_this.autoMove.call(_this)
},_this.interval);
_this.bannerLeft.style.display = _this.bannerRight.style.display = "none"
}
},
//实现焦点切换
tipEvent:function(){
var _this = this;
for(var i = 0,len = this.oLis.length;i<len;i++){
var curLi = this.oLis[i];
curLi.index = i;
curLi.onclick = function(){
_this.step = this.index;
_this.setBanner();
}
}
},
//实现左右切换
leftRight:function(){
var _this = this;
this.bannerRight.onclick = function(){
_this.autoMove();
};
this.bannerLeft.onclick = function(){
if(_this.step === 0){
_this.step = _this.jsonData.length;
}
_this.step--;
_this.setBanner();
}
},
//当前插件的唯一入口 命令模式:init相当于指挥室，指挥各军队协同作战
init:function(){
var _this = this;
this.getData();
this.bindData();
window.setTimeout(function(){
_this.lazyImg();
},500);
this.autoTimer = window.setInterval(function(){
_this.autoMove();
},this.interval);
this.mouseEvent();
this.tipEvent();
this.leftRight();
return this;
}
}
window.AutoBanner = AutoBanner
}()
//使用
var banner1 = new AutoBanner('banner','json/banner.txt',1000)程式碼界的小白，工作上需要多次呼叫左右轉換的輪播圖，我就給封裝了。但是總覺得自己寫的程式碼比較繁瑣。方法比較笨，求大神給簡潔化一下，順便學習。 另外如果預設值是top的話。動畫效果會沒有。
$.fn.zuoyouzhuan = function(options) {
this.each(function(i, ele) {
slide(ele, options)
})
return this
}
var slide = function(ele, options) {
var des = $.extend({
fangxiang: 'left',
duoshaotu: '4',
sudu: '3000'
}, options)
var $ele = $(ele)
var $ul = $ele.find('ul')
var $li = $ele.find('li')
var x_width = $ele.find('li').width()
var y_height = $ele.find('li').height()
var num = $ele.find('li').length;
if(des.fangxiang == "top") {
var topmar = parseInt($li.css('margin-bottom'))
var boderw= parseInt($('li').css('border-width'))
$ul.css({ 'heigth': (num * (y_height + topmar + boderw*2)) + 'px' });
}
if(des.fangxiang == "left") {
var boderw= parseInt($('li').css('border-width'))
var rightmar = parseInt($li.css('margin-right'))
$ul.css({ 'width': (num * (x_width + rightmar+boderw*2)) + 'px' });
}
var t;
if(num > des.duoshaotu) {
var t = setInterval(sidebarFlipAuto, des.sudu);
function sidebarFlipAuto() {
if(des.fangxiang == "left") {
$ul.stop(true, true).animate({ "left": (x_width + rightmar) + 'px' }, 300, function() {
$ul.find('li:first').appendTo($ul);
$ul.css("left", '0');
});
}
if(des.fangxiang == "top") {
$ul.stop(true, true).animate({ "top": (y_height + topmar) + 'px' }, 300, function() {
$ul.find('li:first').appendTo($ul);
$ul.css("top", '0');
});
}
}
$ul.hover(function() {
clearInterval(t);
}, function() {
t = setInterval(sidebarFlipAuto, 4000);
})
$ele.find('span').eq(0).unbind('click').click(function() {
$ul.find('li:last').prependTo($ul);
if(des.fangxiang == "left") {
$ul.css({ "left": (x_width + rightmar) + 'px' });
$ul.stop(true, true).animate({ "left": '0' }, 300);
}
if(des.fangxiang == "top") {
$ul.css({ "top": (y_height + rightmar) + 'px' });
$ul.stop(true, true).animate({ "top": '0' }, 300);
}
})
$ele.find('span').eq(1).unbind('click').click(function() {
sidebarFlipAuto();
})
}
}
那个.unbind('click').click不写这个有时会执行两次，所以百度了一下这个方法。
求简洁化。以上是javascript中的輪播圖插件化的封裝範例的詳細內容。更多資訊請關注PHP中文網其他相關文章！
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