我试图让两个alpha-24透明的.png文件相互交叉淡入淡出。我通过修改一个相当不错的小脚本开始了这个冒险(感谢jqueryfordesigners.com):
// wrap as a jQuery plugin and pass jQuery in to our anoymous function
(function ($) {
$.fn.cross = function (options) {
return this.each(function (i) {
// cache the copy of jQuery(this) - the start image
var $$ = $(this);
// get the target from the backgroundImage + regexp
var target = $$.css('backgroundImage').replace(/^url|[\(\)'"]/g, '');
// nice long chain: wrap img element in span
$$.wrap('<span style="position: relative;"></span>')
// change selector to parent - i.e. newly created span
.parent()
// prepend a new image inside the span
.prepend('<img>')
// change the selector to the newly created image
.find(':first-child')
// set the image to the target
.attr('src', target);
// the CSS styling of the start image needs to be handled
// differently for different browsers
if ($.browser.mozilla) {
$$.css({
'position' : 'absolute',
'left' : 0,
'background' : '',
'top' : this.offsetTop
});
} else if ($.browser.msie && $.browser.version == 8.0) {
$$.css({
'position' : 'absolute',
'left' : 0,
'background' : '',
'-ms-background-position-x' : '0px',
'-ms-background-position-y' : '0px'
});
} else if ($.browser.msie) {
$$.css({
'position' : 'absolute',
'left' : 0,
'background' : '',
'top' : 0
});
} else if ($.browser.opera && $.browser.version < 9.5) {
// Browser sniffing is bad - however opera < 9.5 has a render bug
// so this is required to get around it we can't apply the 'top' : 0
// separately because Mozilla strips the style set originally somehow...
$$.css({
'position' : 'absolute',
'left' : 0,
'background' : '',
'top' : "0"
});
} else { // Safari & Chrome
$$.css({
'position' : 'absolute',
'left' : 0,
'background' : ''
});
}
// similar effect as single image technique, except using .animate
// which will handle the fading up from the right opacity for us
$$.hover(function () {
$$.stop().animate({
opacity: 0
}, 250);
}, function () {
$$.stop().animate({
opacity: 1
}, 250);
});
});
};
})(jQuery);
// note that this uses the .bind('load') on the window object, rather than $(document).ready()
// because .ready() fires before the images have loaded, but we need to fire *after* because
// our code relies on the dimensions of the images already in place.
$(window).bind('load', function () {
$('img.fade').cross();
});
我做的主要修改是通过修复一些绝对定位错误使其在IE7 / 8和webkit中工作。现在唯一的问题是我遇到了一个问题 - [stackoverflow.com/questions/1156985,IE7和IE8]一次只能处理一个图像的透明度。交叉渐变给出了效果期间和之后灰显图像的结果。检查一下:http://dap-llc.com/work/
任何人都有办法解决这个问题吗?并没有建议我淡化容器元素的点 - 必须有一种方法在IE中的图像级别上执行此操作。
答案 0 :(得分:1)
查看jquery.innerfade。你所追求的已经写好了(而且效果很好)。
答案 1 :(得分:0)
在IE8上它可以正常工作..你有标准的内置IE或IETester吗?我有IE8的Windows 7,它可以正常工作。
编辑:它在IETester中也有效..即使在IE6 xD
中也是如此