具体可见示例:模拟Marquee无缝滚动
代码如下:
/**
* @classDescription 模拟Marquee,无间断滚动内容
* @author Aken Li(www.kxbd.com)
* @DOM
*
* @CSS
* #marquee {width:200px;height:50px;overflow:hidden;}
* @Usage
* $('#marquee').kxbdMarquee(options);
* @options
* isEqual:true,//所有滚动的元素长宽是否相等,true,false
* loop: 0,//循环滚动次数,0时无限
* direction: 'left',//滚动方向,'left','right','up','down'
* scrollAmount:1,//步长
* scrollDelay:20//时长
*/
(function($){
$.fn.kxbdMarquee = function(options){
var opts = $.extend({},$.fn.kxbdMarquee.defaults, options);
return this.each(function(){
var $marquee = $(this);//滚动元素容器
var _scrollObj = $marquee.get(0);//滚动元素容器DOM
var scrollW = $marquee.width();//滚动元素容器的宽度
var scrollH = $marquee.height();//滚动元素容器的高度
var $element = $marquee.children(); //滚动元素
var $kids = $element.children();//滚动子元素
var scrollSize=0;//滚动元素尺寸
var _type = (opts.direction == 'left' || opts.direction == 'right') ? 1:0;//滚动类型,1左右,0上下
//防止滚动子元素比滚动元素宽而取不到实际滚动子元素宽度
$element.css(_type?'width':'height',10000);
//获取滚动元素的尺寸
if (opts.isEqual) {
scrollSize = $kids[_type?'outerWidth':'outerHeight']() * $kids.length;
}else{
$kids.each(function(){
scrollSize += $(this)[_type?'outerWidth':'outerHeight']();
});
}
//滚动元素总尺寸小于容器尺寸,不滚动
if (scrollSize<(_type?scrollW:scrollH)) return;
//克隆滚动子元素将其插入到滚动元素后,并设定滚动元素宽度
$element.append($kids.clone()).css(_type?'width':'height',scrollSize*2);
var numMoved = 0;
function scrollFunc(){
var _dir = (opts.direction == 'left' || opts.direction == 'right') ? 'scrollLeft':'scrollTop';
if (opts.loop > 0) {
numMoved+=opts.scrollAmount;
if(numMoved>scrollSize*opts.loop){
_scrollObj[_dir] = 0;
return clearInterval(moveId);
}
}
if(opts.direction == 'left' || opts.direction == 'up'){
_scrollObj[_dir] +=opts.scrollAmount;
if(_scrollObj[_dir]>=scrollSize){
_scrollObj[_dir] = 0;
}
}else{
_scrollObj[_dir] -=opts.scrollAmount;
if(_scrollObj[_dir]<=0){
_scrollObj[_dir] = scrollSize;
}
}
}
//滚动开始
var moveId = setInterval(scrollFunc, opts.scrollDelay);
//鼠标划过停止滚动
$marquee.hover(
function(){
clearInterval(moveId);
},
function(){
clearInterval(moveId);
moveId = setInterval(scrollFunc, opts.scrollDelay);
}
);
});
};
$.fn.kxbdMarquee.defaults = {
isEqual:true,//所有滚动的元素长宽是否相等,true,false
loop: 0,//循环滚动次数,0时无限
direction: 'left',//滚动方向,'left','right','up','down'
scrollAmount:1,//步长
scrollDelay:20//时长
};
$.fn.kxbdMarquee.setDefaults = function(settings) {
$.extend( $.fn.kxbdMarquee.defaults, settings );
};
})(jQuery);
调用页面 展示
kxbdMarquee - 模拟Marquee无缝滚动