我创建了一个＆＃34; Elastic Image＆＃34;我的头版幻灯片。它工作正常。但图像仍然相当小。将图像拉伸到屏幕的宽度上会更合适。
有人熟悉如何实现这一目标吗？我将在下面提供整个代码。
提前非常感谢你。
首先是CSS文件：
.ei-slider{
position: relative;
width: 100%;
max-width: 1999px;
height: 500px;
margin: 0 auto;
}
.ei-slider-loading{
width: 100%;
height: 100%;
position: absolute;
top: 0px;
left: 0px;
z-index:999;
background: rgba(0,0,0,0.9);
color: #fff;
text-align: center;
line-height: 400px;
}
.ei-slider-large{
height: 100%;
width: 100%;
position:relative;
overflow: hidden;
}
.ei-slider-large li{
position: absolute;
top: 20px;
left: 0px;
overflow: hidden;
height: 100%;
width: 100%;
}
.ei-slider-large li img{
width: 100%;
}
.ei-title h4{
position: absolute;
left: 50%;
margin-right: 13%;
top: 30%;
}
.ei-title h2, h3{
position: absolute;
right: 50%;
margin-right: 13%;
top: 30%;
}
.ei-title h2, .ei-title h3{
text-align: right;
}
.ei-title h4 {
text-align: left;
}
.ei-title h2{
font-size: 40px;
line-height: 50px;
font-family: 'Playfair Display', serif;
font-style: italic;
color: #b5b5b5;
}
.ei-title h3{
font-size: 20px;
line-height: 20px;
font-family: 'Open Sans Condensed', sans-serif;
text-transform: uppercase;
color: #000;
}
.ei-title h4{
font-size: 10px;
line-height: 20px;
font-family: 'sans-serif'; italic;
text-transform: uppercase;
color: #f0ffff;
}
/* the thumbs... */
.ei-slider-thumbs{
height: 1px;
margin: 0 auto;
position: relative;
}
.ei-slider-thumbs li{
position: relative;
float: left;
height: 10%;
}
.ei-slider-thumbs li.ei-slider-element{
top: 0px;
left: 0px;
position: absolute;
height: 10%;
z-index: 10;
text-indent: -9000px;
background: #000;
background: rgba(0,0,0,0.9);
}
.ei-slider-thumbs li a{
display: block;
text-indent: -9000px;
background: #666 ;
width: 100%;
height: 100%;
cursor: pointer;
-webkit-box-shadow:
0px 1px 1px 0px rgba(0,0,0,0.3),
0px 1px 0px 1px rgba(255,255,255,0.5);
-moz-box-shadow:
0px 1px 1px 0px rgba(0,0,0,0.3),
0px 1px 0px 1px rgba(255,255,255,0.5);
box-shadow:
0px 1px 1px 0px rgba(0,0,0,0.3),
0px 1px 0px 1px rgba(255,255,255,0.5);
-webkit-transition: background 0.2s ease;
-moz-transition: background 0.2s ease;
-o-transition: background 0.2s ease;
-ms-transition: background 0.2s ease;
transition: background 0.2s ease;
}
.ei-slider-thumbs li a:hover{
background-color: #f0f0f0;
}
.ei-slider-thumbs li img{
position: absolute;
bottom: 10px;
opacity: 0;
z-index: 999;
max-width: 100%;
-webkit-transition: all 0.4s ease;
-moz-transition: all 0.4s ease;
-o-transition: all 0.4s ease;
-ms-transition: all 0.4s ease;
transition: all 0.4s ease;
-webkit-box-reflect:
below 0px -webkit-gradient(
linear,
left top,
left bottom,
from(transparent),
color-stop(50%, transparent),
to(rgba(255,255,255,0.3))
);
-ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=0)";
}
.ei-slider-thumbs li:hover img{
opacity: -1;
bottom: -1px;
-ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=100)";
}
@media screen and (max-width: 830px) {
.ei-title{
position: absolute;
right: 0px;
margin-right: 0px;
width: 100%;
text-align: center;
top: auto;
bottom: 10px;
background: #fff;
background: rgba(255,255,255,0.9);
padding: 5px 0;
}
.ei-title h2, .ei-title h3, .ei-title h4 {
text-align: center;
}
.ei-title h2{
font-size: 30px;
line-height: 24px;
}
.ei-title h3{
font-size: 20px;
line-height: 20px;
}
.ei-title h4{
font-size: 10px;
line-height: 20px;
}
}
接下来，javascript文件：
(function( window, $, undefined ) {
/*
* smartresize: debounced resize event for jQuery
*
* latest version and complete README available on Github:
* https://github.com/louisremi/jquery.smartresize.js
*
* Copyright 2011 @louis_remi
* Licensed under the MIT license.
*/
var $event = $.event, resizeTimeout;
$event.special.smartresize = {
setup: function() {
$(this).bind( "resize", $event.special.smartresize.handler );
},
teardown: function() {
$(this).unbind( "resize", $event.special.smartresize.handler );
},
handler: function( event, execAsap ) {
// Save the context
var context = this,
args = arguments;
// set correct event type
event.type = "smartresize";
if ( resizeTimeout ) { clearTimeout( resizeTimeout ); }
resizeTimeout = setTimeout(function() {
jQuery.event.handle.apply( context, args );
}, execAsap === "execAsap"? 0 : 100 );
}
};
$.fn.smartresize = function( fn ) {
return fn ? this.bind( "smartresize", fn ) : this.trigger( "smartresize", ["execAsap"] );
};
$.Slideshow = function( options, element ) {
this.$el = $( element );
/***** images ****/
// list of image items
this.$list = this.$el.find('ul.ei-slider-large');
// image items
this.$imgItems = this.$list.children('li');
// total number of items
this.itemsCount = this.$imgItems.length;
// images
this.$images = this.$imgItems.find('img:first');
/***** thumbs ****/
// thumbs wrapper
this.$sliderthumbs = this.$el.find('ul.ei-slider-thumbs').hide();
// slider elements
this.$sliderElems = this.$sliderthumbs.children('li');
// sliding div
this.$sliderElem = this.$sliderthumbs.children('li.ei-slider-element');
// thumbs
this.$thumbs = this.$sliderElems.not('.ei-slider-element');
// initialize slideshow
this._init( options );
};
$.Slideshow.defaults = {
// animation types:
// "sides" : new slides will slide in from left / right
// "center": new slides will appear in the center
animation : 'sides', // sides || center
// if true the slider will automatically slide, and it will only stop if the user clicks on a thumb
autoplay : false,
// interval for the slideshow
slideshow_interval : 3000,
// speed for the sliding animation
speed : 1000,
// easing for the sliding animation
easing : '',
// percentage of speed for the titles animation. Speed will be speed * titlesFactor
titlesFactor : 0.60,
// titles animation speed
titlespeed : 900,
// titles animation easing
titleeasing : '',
// maximum width for the thumbs in pixels
thumbMaxWidth : 150
};
$.Slideshow.prototype = {
_init : function( options ) {
this.options = $.extend( true, {}, $.Slideshow.defaults, options );
// set the opacity of the title elements and the image items
this.$imgItems.css( 'opacity', 0 );
this.$imgItems.find('div.ei-title > *').css( 'opacity', 0 );
// index of current visible slider
this.current = 0;
var _self = this;
// preload images
// add loading status
this.$loading = $('<div class="ei-slider-loading">Loading</div>').prependTo( _self.$el );
$.when( this._preloadImages() ).done( function() {
// hide loading status
_self.$loading.hide();
// calculate size and position for each image
_self._setImagesSize();
// configure thumbs container
_self._initThumbs();
// show first
_self.$imgItems.eq( _self.current ).css({
'opacity' : 1,
'z-index' : 10
}).show().find('div.ei-title > *').css( 'opacity', 1 );
// if autoplay is true
if( _self.options.autoplay ) {
_self._startSlideshow();
}
// initialize the events
_self._initEvents();
});
},
_preloadImages : function() {
// preloads all the large images
var _self = this,
loaded = 0;
return $.Deferred(
function(dfd) {
_self.$images.each( function( i ) {
$('<img/>').load( function() {
if( ++loaded === _self.itemsCount ) {
dfd.resolve();
}
}).attr( 'src', $(this).attr('src') );
});
}
).promise();
},
_setImagesSize : function() {
// save ei-slider's width
this.elWidth = this.$el.width();
var _self = this;
this.$images.each( function( i ) {
var $img = $(this);
imgDim = _self._getImageDim( $img.attr('src') );
$img.css({
width : imgDim.width,
height : imgDim.height,
marginLeft : imgDim.left,
marginTop : imgDim.top
});
});
},
_getImageDim : function( src ) {
var $img = new Image();
$img.src = src;
var c_w = this.elWidth,
c_h = this.$el.height(),
r_w = c_h / c_w,
i_w = $img.width,
i_h = $img.height,
r_i = i_h / i_w,
new_w, new_h, new_left, new_top;
if( r_w > r_i ) {
new_h = c_h;
new_w = c_h / r_i;
}
else {
new_h = c_w * r_i;
new_w = c_w;
}
return {
width : new_w,
height : new_h,
left : ( c_w - new_w ) / 2,
top : ( c_h - new_h ) / 2
};
},
_initThumbs : function() {
// set the max-width of the slider elements to the one set in the plugin's options
// also, the width of each slider element will be 100% / total number of elements
this.$sliderElems.css({
'max-width' : this.options.thumbMaxWidth + 'px',
'width' : 100 / this.itemsCount + '%'
});
// set the max-width of the slider and show it
this.$sliderthumbs.css( 'max-width', this.options.thumbMaxWidth * this.itemsCount + 'px' ).show();
},
_startSlideshow : function() {
var _self = this;
this.slideshow = setTimeout( function() {
var pos;
( _self.current === _self.itemsCount - 1 ) ? pos = 0 : pos = _self.current + 1;
_self._slideTo( pos );
if( _self.options.autoplay ) {
_self._startSlideshow();
}
}, this.options.slideshow_interval);
},
// shows the clicked thumb's slide
_slideTo : function( pos ) {
// return if clicking the same element or if currently animating
if( pos === this.current || this.isAnimating )
return false;
this.isAnimating = true;
var $currentSlide = this.$imgItems.eq( this.current ),
$nextSlide = this.$imgItems.eq( pos ),
_self = this,
preCSS = {zIndex : 10},
animCSS = {opacity : 1};
// new slide will slide in from left or right side
if( this.options.animation === 'sides' ) {
preCSS.left = ( pos > this.current ) ? -1 * this.elWidth : this.elWidth;
animCSS.left = 0;
}
// titles animation
$nextSlide.find('div.ei-title > h2')
.css( 'margin-right', 50 + 'px' )
.stop()
.delay( this.options.speed * this.options.titlesFactor )
.animate({ marginRight : 0 + 'px', opacity : 1 }, this.options.titlespeed, this.options.titleeasing )
.end()
.find('div.ei-title > h3')
.css( 'margin-right', -50 + 'px' )
.stop()
.delay( this.options.speed * this.options.titlesFactor )
.animate({ marginRight : 0 + 'px', opacity : 1 }, this.options.titlespeed, this.options.titleeasing )
$.when(
// fade out current titles
$currentSlide.css( 'z-index' , 1 ).find('div.ei-title > *').stop().fadeOut( this.options.speed / 2, function() {
// reset style
$(this).show().css( 'opacity', 0 );
}),
// animate next slide in
$nextSlide.css( preCSS ).stop().animate( animCSS, this.options.speed, this.options.easing ),
// "sliding div" moves to new position
this.$sliderElem.stop().animate({
left : this.$thumbs.eq( pos ).position().left
}, this.options.speed )
).done( function() {
// reset values
$currentSlide.css( 'opacity' , 0 ).find('div.ei-title > *').css( 'opacity', 0 );
_self.current = pos;
_self.isAnimating = false;
});
},
_initEvents : function() {
var _self = this;
// window resize
$(window).on( 'smartresize.eislideshow', function( event ) {
// resize the images
_self._setImagesSize();
// reset position of thumbs sliding div
_self.$sliderElem.css( 'left', _self.$thumbs.eq( _self.current ).position().left );
});
// click the thumbs
this.$thumbs.on( 'click.eislideshow', function( event ) {
if( _self.options.autoplay ) {
clearTimeout( _self.slideshow );
_self.options.autoplay = false;
}
var $thumb = $(this),
idx = $thumb.index() - 1; // exclude sliding div
_self._slideTo( idx );
return false;
});
}
};
var logError = function( message ) {
if ( this.console ) {
console.error( message );
}
};
$.fn.eislideshow = function( options ) {
if ( typeof options === 'string' ) {
var args = Array.prototype.slice.call( arguments, 1 );
this.each(function() {
var instance = $.data( this, 'eislideshow' );
if ( !instance ) {
logError( "cannot call methods on eislideshow prior to initialization; " +
"attempted to call method '" + options + "'" );
return;
}
if ( !$.isFunction( instance[options] ) || options.charAt(0) === "_" ) {
logError( "no such method '" + options + "' for eislideshow instance" );
return;
}
instance[ options ].apply( instance, args );
});
}
else {
this.each(function() {
var instance = $.data( this, 'eislideshow' );
if ( !instance ) {
$.data( this, 'eislideshow', new $.Slideshow( options, this ) );
}
});
}
return this;
};
})( window, jQuery );
最后，HTML：
<div class="wrapper">
<div id="ei-slider" class="ei-slider">
<ul class="ei-slider-large">
<li>
<img src="uploads/2016/01/slider-3.jpg" alt="image01">
<div class="ei-title">
<h2>High end Management Tools</h2>
<h3>Available at your fingertips!</h3>
<h4>With the available technologies, we provide the methods and tools that will help society to excel to new heights</h4>
</div>
</li>
<li>
<img src="uploads/2016/01/about-1.jpg" alt="image02" />
<div class="ei-title">
<h2>Enterprises, Administration Managers</h2>
<h3>Improve your Performance!</h3>
<h4>Regardless of your position, we have the solutions for all levels of professionals, and students alike.... </h4>
</div>
</li>
<li>
<img src="uploads/2016/01/home-parallax.jpg" alt="image03" />
<div class="ei-title">
<h2>Stunning Solutions</h2>
<h3>For Remarkable results!</h3>
<h4>We are bringing today's technology to assist the traditional family with promising results.</h4>
</div>
</li>
</ul><!-- ei-slider-large -->
</div><!-- ei-slider -->
</div><!-- wrapper -->
</div>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.0/jquery.min.js"></script>
<script type="text/javascript" src="js/jquery.eislideshow.js"></script>
<script type="text/javascript" src="js/jquery.easing.1.3.js"></script>
<script type="text/javascript">
$(function() {
$('#ei-slider').eislideshow({
animation : 'center',
autoplay : true,
slideshow_interval : 6000,
titlesFactor : 0
});
});
</script>