你能帮我循环播放这个转盘吗？我对jquery及其属性一无所知。如果我在不知情的情况下弄乱它，我恐怕会搞砸。我从我买的模板中得到了这个。
/*!
* jCarousel - Riding carousels with jQuery
* http://sorgalla.com/jcarousel/
*
* Copyright (c) 2006 Jan Sorgalla (http://sorgalla.com)
* Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php)
* and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses.
*
* Built on top of the jQuery library
* http://jquery.com
*
* Inspired by the "Carousel Component" by Bill Scott
* http://billwscott.com/carousel/
*/
/*global window, jQuery */
(function($) {
// Default configuration properties.
var defaults = {
vertical: false,
rtl: false,
start: 1,
offset: 1,
size: null,
scroll: 1,
visible: null,
animation: 'normal',
easing: 'swing',
auto: 5,
wrap: null,
initCallback: null,
setupCallback: null,
reloadCallback: null,
itemLoadCallback: null,
itemFirstInCallback: null,
itemFirstOutCallback: null,
itemLastInCallback: null,
itemLastOutCallback: null,
itemVisibleInCallback: null,
itemVisibleOutCallback: null,
animationStepCallback: null,
buttonNextHTML: '<div></div>',
buttonPrevHTML: '<div></div>',
buttonNextEvent: 'click',
buttonPrevEvent: 'click',
buttonNextCallback: null,
buttonPrevCallback: null,
itemFallbackDimension: null
}, windowLoaded = false;
$(window).bind('load.jcarousel', function() { windowLoaded = true; });
/**
* The jCarousel object.
*
* @constructor
* @class jcarousel
* @param e {HTMLElement} The element to create the carousel for.
* @param o {Object} A set of key/value pairs to set as configuration properties.
* @cat Plugins/jCarousel
*/
$.jcarousel = function(e, o) {
this.options = $.extend({}, defaults, o || {});
this.locked = false;
this.autoStopped = false;
this.container = null;
this.clip = null;
this.list = null;
this.buttonNext = null;
this.buttonPrev = null;
this.buttonNextState = null;
this.buttonPrevState = null;
// Only set if not explicitly passed as option
if (!o || o.rtl === undefined) {
this.options.rtl = ($(e).attr('dir') || $('html').attr('dir') || '').toLowerCase() == 'rtl';
}
this.wh = !this.options.vertical ? 'width' : 'height';
this.lt = !this.options.vertical ? (this.options.rtl ? 'right' : 'left') : 'top';
// Extract skin class
var skin = '', split = e.className.split(' ');
for (var i = 0; i < split.length; i++) {
if (split[i].indexOf('jcarousel-skin') != -1) {
$(e).removeClass(split[i]);
skin = split[i];
break;
}
}
if (e.nodeName.toUpperCase() == 'UL' || e.nodeName.toUpperCase() == 'OL') {
this.list = $(e);
this.clip = this.list.parents('.jcarousel-clip');
this.container = this.list.parents('.jcarousel-container');
} else {
this.container = $(e);
this.list = this.container.find('ul,ol').eq(0);
this.clip = this.container.find('.jcarousel-clip');
}
if (this.clip.size() === 0) {
this.clip = this.list.wrap('<div></div>').parent();
}
if (this.container.size() === 0) {
this.container = this.clip.wrap('<div></div>').parent();
}
if (skin !== '' && this.container.parent()[0].className.indexOf('jcarousel-skin') == -1) {
this.container.wrap('<div class=" '+ skin + '"></div>');
}
this.buttonPrev = $('.jcarousel-prev', this.container);
if (this.buttonPrev.size() === 0 && this.options.buttonPrevHTML !== null) {
this.buttonPrev = $(this.options.buttonPrevHTML).appendTo(this.container);
}
this.buttonPrev.addClass(this.className('jcarousel-prev'));
this.buttonNext = $('.jcarousel-next', this.container);
if (this.buttonNext.size() === 0 && this.options.buttonNextHTML !== null) {
this.buttonNext = $(this.options.buttonNextHTML).appendTo(this.container);
}
this.buttonNext.addClass(this.className('jcarousel-next'));
this.clip.addClass(this.className('jcarousel-clip')).css({
position: 'relative'
});
this.list.addClass(this.className('jcarousel-list')).css({
overflow: 'hidden',
position: 'relative',
top: 0,
margin: 0,
padding: 0
}).css((this.options.rtl ? 'right' : 'left'), 0);
this.container.addClass(this.className('jcarousel-container')).css({
position: 'relative'
});
if (!this.options.vertical && this.options.rtl) {
this.container.addClass('jcarousel-direction-rtl').attr('dir', 'rtl');
}
var di = this.options.visible !== null ? Math.ceil(this.clipping() / this.options.visible) : null;
var li = this.list.children('li');
var self = this;
if (li.size() > 0) {
var wh = 0, j = this.options.offset;
li.each(function() {
self.format(this, j++);
wh += self.dimension(this, di);
});
this.list.css(this.wh, (wh + 100) + 'px');
// Only set if not explicitly passed as option
if (!o || o.size === undefined) {
this.options.size = li.size();
}
}
// For whatever reason, .show() does not work in Safari...
this.container.css('display', 'block');
this.buttonNext.css('display', 'block');
this.buttonPrev.css('display', 'block');
this.funcNext = function() { self.next(); };
this.funcPrev = function() { self.prev(); };
this.funcResize = function() {
if (self.resizeTimer) {
clearTimeout(self.resizeTimer);
}
self.resizeTimer = setTimeout(function() {
self.reload();
}, 100);
};
if (this.options.initCallback !== null) {
this.options.initCallback(this, 'init');
}
if (!windowLoaded && $.browser.safari) {
this.buttons(false, false);
$(window).bind('load.jcarousel', function() { self.setup(); });
} else {
this.setup();
}
};
// Create shortcut for internal use
var $jc = $.jcarousel;
$jc.fn = $jc.prototype = {
jcarousel: '0.2.8'
};
$jc.fn.extend = $jc.extend = $.extend;
$jc.fn.extend({
/**
* Setups the carousel.
*
* @method setup
* @return undefined
*/
setup: function() {
this.first = null;
this.last = null;
this.prevFirst = null;
this.prevLast = null;
this.animating = false;
this.timer = null;
this.resizeTimer = null;
this.tail = null;
this.inTail = false;
if (this.locked) {
return;
}
this.list.css(this.lt, this.pos(this.options.offset) + 'px');
var p = this.pos(this.options.start, true);
this.prevFirst = this.prevLast = null;
this.animate(p, false);
$(window).unbind('resize.jcarousel', this.funcResize).bind('resize.jcarousel', this.funcResize);
if (this.options.setupCallback !== null) {
this.options.setupCallback(this);
}
},
/**
* Clears the list and resets the carousel.
*
* @method reset
* @return undefined
*/
reset: function() {
this.list.empty();
this.list.css(this.lt, '0px');
this.list.css(this.wh, '10px');
if (this.options.initCallback !== null) {
this.options.initCallback(this, 'reset');
}
this.setup();
},
/**
* Reloads the carousel and adjusts positions.
*
* @method reload
* @return undefined
*/
reload: function() {
if (this.tail !== null && this.inTail) {
this.list.css(this.lt, $jc.intval(this.list.css(this.lt)) + this.tail);
}
this.tail = null;
this.inTail = false;
if (this.options.reloadCallback !== null) {
this.options.reloadCallback(this);
}
if (this.options.visible !== null) {
var self = this;
var di = Math.ceil(this.clipping() / this.options.visible), wh = 0, lt = 0;
this.list.children('li').each(function(i) {
wh += self.dimension(this, di);
if (i + 1 < self.first) {
lt = wh;
}
});
this.list.css(this.wh, wh + 'px');
this.list.css(this.lt, -lt + 'px');
}
this.scroll(this.first, false);
},
/**
* Locks the carousel.
*
* @method lock
* @return undefined
*/
lock: function() {
this.locked = true;
this.buttons();
},
/**
* Unlocks the carousel.
*
* @method unlock
* @return undefined
*/
unlock: function() {
this.locked = false;
this.buttons();
},
/**
* Sets the size of the carousel.
*
* @method size
* @return undefined
* @param s {Number} The size of the carousel.
*/
size: function(s) {
if (s !== undefined) {
this.options.size = s;
if (!this.locked) {
this.buttons();
}
}
return this.options.size;
},
/**
* Checks whether a list element exists for the given index (or index range).
*
* @method get
* @return bool
* @param i {Number} The index of the (first) element.
* @param i2 {Number} The index of the last element.
*/
has: function(i, i2) {
if (i2 === undefined || !i2) {
i2 = i;
}
if (this.options.size !== null && i2 > this.options.size) {
i2 = this.options.size;
}
for (var j = i; j <= i2; j++) {
var e = this.get(j);
if (!e.length || e.hasClass('jcarousel-item-placeholder')) {
return false;
}
}
return true;
},
/**
* Returns a jQuery object with list element for the given index.
*
* @method get
* @return jQuery
* @param i {Number} The index of the element.
*/
get: function(i) {
return $('>.jcarousel-item-' + i, this.list);
},
/**
* Adds an element for the given index to the list.
* If the element already exists, it updates the inner html.
* Returns the created element as jQuery object.
*
* @method add
* @return jQuery
* @param i {Number} The index of the element.
* @param s {String} The innerHTML of the element.
*/
add: function(i, s) {
var e = this.get(i), old = 0, n = $(s);
if (e.length === 0) {
var c, j = $jc.intval(i);
e = this.create(i);
while (true) {
c = this.get(--j);
if (j <= 0 || c.length) {
if (j <= 0) {
this.list.prepend(e);
} else {
c.after(e);
}
break;
}
}
} else {
old = this.dimension(e);
}
if (n.get(0).nodeName.toUpperCase() == 'LI') {
e.replaceWith(n);
e = n;
} else {
e.empty().append(s);
}
this.format(e.removeClass(this.className('jcarousel-item-placeholder')), i);
var di = this.options.visible !== null ? Math.ceil(this.clipping() / this.options.visible) : null;
var wh = this.dimension(e, di) - old;
if (i > 0 && i < this.first) {
this.list.css(this.lt, $jc.intval(this.list.css(this.lt)) - wh + 'px');
}
this.list.css(this.wh, $jc.intval(this.list.css(this.wh)) + wh + 'px');
return e;
},
/**
* Removes an element for the given index from the list.
*
* @method remove
* @return undefined
* @param i {Number} The index of the element.
*/
remove: function(i) {
var e = this.get(i);
// Check if item exists and is not currently visible
if (!e.length || (i >= this.first && i <= this.last)) {
return;
}
var d = this.dimension(e);
if (i < this.first) {
this.list.css(this.lt, $jc.intval(this.list.css(this.lt)) + d + 'px');
}
e.remove();
this.list.css(this.wh, $jc.intval(this.list.css(this.wh)) - d + 'px');
},
/**
* Moves the carousel forwards.
*
* @method next
* @return undefined
*/
next: function() {
if (this.tail !== null && !this.inTail) {
this.scrollTail(false);
} else {
this.scroll(((this.options.wrap == 'both' || this.options.wrap == 'last') && this.options.size !== null && this.last == this.options.size) ? 1 : this.first + this.options.scroll);
}
},
/**
* Moves the carousel backwards.
*
* @method prev
* @return undefined
*/
prev: function() {
if (this.tail !== null && this.inTail) {
this.scrollTail(true);
} else {
this.scroll(((this.options.wrap == 'both' || this.options.wrap == 'first') && this.options.size !== null && this.first == 1) ? this.options.size : this.first - this.options.scroll);
}
},
/**
* Scrolls the tail of the carousel.
*
* @method scrollTail
* @return undefined
* @param b {Boolean} Whether scroll the tail back or forward.
*/
scrollTail: function(b) {
if (this.locked || this.animating || !this.tail) {
return;
}
this.pauseAuto();
var pos = $jc.intval(this.list.css(this.lt));
pos = !b ? pos - this.tail : pos + this.tail;
this.inTail = !b;
// Save for callbacks
this.prevFirst = this.first;
this.prevLast = this.last;
this.animate(pos);
},
/**
* Scrolls the carousel to a certain position.
*
* @method scroll
* @return undefined
* @param i {Number} The index of the element to scoll to.
* @param a {Boolean} Flag indicating whether to perform animation.
*/
scroll: function(i, a) {
if (this.locked || this.animating) {
return;
}
this.pauseAuto();
this.animate(this.pos(i), a);
},
/**
* Prepares the carousel and return the position for a certian index.
*
* @method pos
* @return {Number}
* @param i {Number} The index of the element to scoll to.
* @param fv {Boolean} Whether to force last item to be visible.
*/
pos: function(i, fv) {
var pos = $jc.intval(this.list.css(this.lt));
if (this.locked || this.animating) {
return pos;
}
if (this.options.wrap != 'circular') {
i = i < 1 ? 1 : (this.options.size && i > this.options.size ? this.options.size : i);
}
var back = this.first > i;
// Create placeholders, new list width/height
// and new list position
var f = this.options.wrap != 'circular' && this.first <= 1 ? 1 : this.first;
var c = back ? this.get(f) : this.get(this.last);
var j = back ? f : f - 1;
var e = null, l = 0, p = false, d = 0, g;
while (back ? --j >= i : ++j < i) {
e = this.get(j);
p = !e.length;
if (e.length === 0) {
e = this.create(j).addClass(this.className('jcarousel-item-placeholder'));
c[back ? 'before' : 'after' ](e);
if (this.first !== null && this.options.wrap == 'circular' && this.options.size !== null && (j <= 0 || j > this.options.size)) {
g = this.get(this.index(j));
if (g.length) {
e = this.add(j, g.clone(true));
}
}
}
c = e;
d = this.dimension(e);
if (p) {
l += d;
}
if (this.first !== null && (this.options.wrap == 'circular' || (j >= 1 && (this.options.size === null || j <= this.options.size)))) {
pos = back ? pos + d : pos - d;
}
}
// Calculate visible items
var clipping = this.clipping(), cache = [], visible = 0, v = 0;
c = this.get(i - 1);
j = i;
while (++visible) {
e = this.get(j);
p = !e.length;
if (e.length === 0) {
e = this.create(j).addClass(this.className('jcarousel-item-placeholder'));
// This should only happen on a next scroll
if (c.length === 0) {
this.list.prepend(e);
} else {
c[back ? 'before' : 'after' ](e);
}
if (this.first !== null && this.options.wrap == 'circular' && this.options.size !== null && (j <= 0 || j > this.options.size)) {
g = this.get(this.index(j));
if (g.length) {
e = this.add(j, g.clone(true));
}
}
}
c = e;
d = this.dimension(e);
if (d === 0) {
throw new Error('jCarousel: No width/height set for items. This will cause an infinite loop. Aborting...');
}
if (this.options.wrap != 'circular' && this.options.size !== null && j > this.options.size) {
cache.push(e);
} else if (p) {
l += d;
}
v += d;
if (v >= clipping) {
break;
}
j++;
}
答案 0 :(得分：0)
您提供的是插件源代码。找到初始化轮播的代码。它看起来类似于
$('#jcarousel').jcarousel({
list: '.jcarousel-list'
});
您可以传递名为wrap的对象属性。所以最终的代码看起来像
$('#jcarousel').jcarousel({
wrap: 'circular'
});
Here您可以找到此文档