我正在这里处理图像滑块。我正在尝试显示当前显示的图像数量，其不透明度为 1，显示在前面。如何检查图像的不透明度以及如何一次又一次地检查它，以便在下一个图像不透明度为 1 时显示 Dom 中的图像编号。这是我的代码html
<div id="Fader" class="fader">
<img class="slide" src="images/lounge/full/1.jpg" alt="bgImg" />
<img class="slide" src="images/lounge/full/2.jpg" alt="bgImg" />
<img class="slide" src="images/lounge/full/3.jpg" alt="bgImg" />
</div>
现在假设我有一段时间后不透明度为 1 的 2.jpg 我如何检查哪个不透明度为 1 显示在顶部？谢谢。
这是js代码
(function ($) {
function prefix(el) {
var prefixes = ["Webkit", "Moz", "O", "ms"];
for (var i = 0; i < prefixes.length; i++) {
if (prefixes[i] + "Transition" in el.style) {
return '-' + prefixes[i].toLowerCase() + '-';
};
};
return "transition" in el.style ? "" : false;
};
var methods = {
init: function (settings) {
return this.each(function () {
var config = {
slideDur: 3000,
fadeDur: 900
};
if (settings) {
$.extend(config, settings);
};
this.config = config;
var $container = $(this),
slideSelector = '.slide',
fading = false,
slideTimer,
activeSlide,
newSlide,
$slides = $container.find(slideSelector),
totalSlides = $slides.length,
$pagerList = $container.find('.pager_list');
prefix = prefix($container[0]);
function animateSlides(activeNdx, newNdx) {
function cleanUp() {
$slides.eq(activeNdx).removeAttr('style');
activeSlide = newNdx;
fading = false;
waitForNext();
};
if (fading || activeNdx == newNdx) {
return false;
};
fading = true;
$pagers.removeClass('active').eq(newSlide).addClass('active');
$slides.eq(activeNdx).css('z-index', 3);
$slides.eq(newNdx).css({
'z-index': 2,
'opacity': 1
});
if (!prefix) {
$slides.eq(activeNdx).animate({ 'opacity': 0 }, config.fadeDur,
function () {
cleanUp();
});
} else {
var styles = {};
styles[prefix + 'transition'] = 'opacity ' + config.fadeDur + 'ms';
styles['opacity'] = 0;
$slides.eq(activeNdx).css(styles);
var fadeTimer = setTimeout(function () {
cleanUp();
}, config.fadeDur);
};
};
function changeSlides(target) {
if (target == 'next') {
newSlide = activeSlide + 1;
if (newSlide > totalSlides - 1) {
newSlide = 0;
}
} else if (target == 'prev') {
newSlide = activeSlide - 1;
if (newSlide < 0) {
newSlide = totalSlides - 1;
};
} else {
newSlide = target;
};
animateSlides(activeSlide, newSlide);
};
function waitForNext() {
slideTimer = setTimeout(function () {
changeSlides('next');
}, config.slideDur);
};
for (var i = 0; i < totalSlides; i++) {
$pagerList
.append('<li class="page" data-target="' + i + '">' + i + '</li>');
};
$container.find('.page').bind('click', function () {
var target = $(this).attr('data-target');
clearTimeout(slideTimer);
changeSlides(target);
});
var $pagers = $pagerList.find('.page');
$slides.eq(0).css('opacity', 1);
$pagers.eq(0).addClass('active');
activeSlide = 0;
waitForNext();
});
}
};
$.fn.easyFader = function (settings) {
return methods.init.apply(this, arguments);
};
})(jQuery);
$(function () {
$('#Fader').easyFader({
slideDur: 6000,
fadeDur: 1000
});
});