imgSlider.js
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var $=require("jquery");
require('./lazyloadImage');
(function(global, undefined) {
var ImgSlider = function(element, options) {
this.options = options;
this.$wrap = $(element);
this.$element = $(element).find("ul");
this.$lis = this.$element.find("li");
this.$ctrl = $(this.options.slideCtrl).appendTo(this.$wrap);
this.$btnPrev = this.$ctrl.find('.slide-ctrl-prev');//上一张按钮
this.$btnNext = this.$ctrl.find('.slide-ctrl-next');//下一张按钮
this.len = this.$lis.length;
this.width = this.$lis.width() + parseInt(this.$lis.css("margin-right"));
this.index = 1;
this.page = 1;
this.init();
};
ImgSlider.DEFAULTS = {
slideCtrl:'<div class="slide-ctrl"><a class="slide-ctrl-prev" href="javascript:;"></a><a class="slide-ctrl-next" href="javascript:;"></a></div>',
pageNum :4,
itemClass:''
};
ImgSlider.prototype = {
constructor: ImgSlider,
init:function(){
var _this = this;
if(this.len<=4) return;
this._calculationWidth(this.len,this.width);
this.$btnPrev.hide();
// 绑定事件
this._bindEvent();
},
/*
* next
*/
next:function(){
this.$btnPrev.show();
this.index ++;
this._animate(-this.width);
},
/*
* prev
*/
prev:function(){
this.$btnNext.show();
this.index --;
this._animate(this.width);
},
/*
* 添加节点
*/
_addDom:function(){
var _this = this;
if(!this.$element.data("url")) return;
$.ajax({
type:'GET',
url:YohoConfig.mainUrl+_this.$element.data("url")+_this.page,
dataType:'json',
success:function(data){
var item = '',
msg = data.data,
len = msg.length;
for(var i=0;i<len;i++){
item += '<li class="'+_this.options.itemClass+'"><a href="javascript:;"><img src="" data-slide="'+msg[i].pics+'" data-original="'+msg[i].cover+'" data-imgzoom="'+msg[i].dynamic+'"/><span>'+msg[i].title+'</span></a></li>'
}
$(item).appendTo(_this.$element);
//添加节点后重新计算宽度
if(_this.options.itemClass !== ''){
_this.len = _this.$element.find("li."+_this.options.itemClass).length;
}else{
_this.len = _this.$element.find("li").length;
}
_this._calculationWidth(_this.len,_this.width);
_this.page++;
}
});
},
/*
* 插件事件绑定
*/
_bindEvent: function(){
var _this = this;
this.$btnNext.on("click",function(){
if (_this.$element.is(':animated')) return;
_this.next();
_this.$element.find("img").lazyload();
if (_this.index == _this.len-_this.options.pageNum+1) {
$(this).hide();
}
if((Math.ceil(_this.index/_this.options.pageNum))%3 === 0 && (Math.ceil((_this.index-1)/_this.options.pageNum))%3 !== 0){
_this._addDom();
}
});
this.$btnPrev.on("click",function(){
if (_this.$element.is(':animated')) return;
_this.prev();
if (_this.index == 1) {
$(this).hide();
}
});
},
/*
* 动画
*/
_animate: function(offset) {
var left = parseInt(this.$element.css('left')) + offset;
var _this = this;
if (offset>0) {
offset = '+=' + offset;
}
else {
offset = '-=' + Math.abs(offset);
}
this.$element.stop().animate({'left': offset}, 300);
},
//计算宽度
_calculationWidth: function(len,width){
this.$element.width(len*width);
},
//resize
resize:function(){
this.width = this.$lis.width() + parseInt(this.$lis.css("margin-right"));
if(this.options.itemClass !== ''){
this.len = this.$element.find("li."+this.options.itemClass).length;
}else{
this.len = this.$element.find("li").length;
}
this._calculationWidth(this.len,this.width);
this.$element.css({'left': -(this.index-1)*this.width});
};
};
function Plugin(option, _relatedTarget) {
return this.each(function() {
var $this = $(this);
var data = $this.data('yoho.ImgSlider');
var options = $.extend({}, ImgSlider.DEFAULTS, $this.data(), typeof option == 'object' && option);
// 如果没有初始化，则初始化该对象，并且把该对象绑定到此元素的yoho.PicSilder属性下。
if (!data) $this.data('yoho.ImgSlider', (data = new ImgSlider(this, options)));
// 如果传递的options是一个字符串，则表示调用改对象的原型方法。
if (typeof option == 'string') data[option](_relatedTarget);
});
}
$.fn.imgSlider = Plugin;
$.fn.imgSlider.Constructor = ImgSlider;
})($);