css transform 3D幻灯片特效实现步骤解读

$(function(){
var length = $(".container a").length;
var $items = $(".container a");
$items.on("transitionend", function(event){
$items.removeClass("trans");
});
$(".container a").each(function(index, value){
var $child = $(this);
if (index === 0) {
$child.addClass("current showing");
} else if (index === 1) {
$child.addClass("left showing");
} else if (index == 2) {
$child.addClass("out-left");
} else if (index == (length - 2)) {
$child.addClass("out-right");
} else if (index === (length - 1)) {
$child.addClass("right showing");
} else {
$child.addClass("hiding");
};


$child.click(function(){
var $item = $(this);
//next item
var $nextItem = (index === (length - 1)) ? $items.eq(0) : $items.eq(index + 1);
//previous item
var $preItem = (index === 0) ? $items.eq(length - 1) : $items.eq(index - 1);
var $rightItem;
if(index == 0){
$rightItem = $items.eq(length - 2);
} else if (index == 1) {
$rightItem = $items.eq(length - 1);
} else {
$rightItem = $items.eq(index - 2);
}
var $leftItem;
if(index == length - 2){
$leftItem = $items.eq(0);
} else if (index == length - 1) {
$leftItem = $items.eq(1);
} else {
$leftItem = $items.eq(index + 2);
}
//current item click,return
if ($item.hasClass("current")) {
return false;
} else if ($item.hasClass("left")) {
//center move right
$preItem.attr("class","trans right showing");
//left move center
$item.attr("class","trans current showing");
//right item move out
$rightItem.attr("class","trans out-right");
//next move left
$nextItem.attr("class","trans left showing");
//left ready
$leftItem.attr("class","out-left");
} else if ($item.hasClass("right")) {
//center move left
$nextItem.attr("class","trans left showing");
//right move center
$item.attr("class","trans current showing");
//left item clear
$leftItem.attr("class","trans out-left");
//previous move right
$preItem.attr("class","trans right showing");
//right ready
$rightItem.attr("class","out-right");
};
});
});
});

body,div{margin: 0;padding: 0;}
.container{width: 100%;height: 450px; position: relative;}
.container .wapper{margin: 0 auto; width: 480px;height: 300px; position: relative;-webkit-transform-style: preserve-3d;-webkit-perspective: 1000px;-moz-transform-style: preserve-3d;-moz-perspective: 1000px;}
.container a{display: block;position: absolute;left: 0;top: 0;-webkit-box-shadow: 0px 1px 1px rgba(255,255,255,0.4);-moz-box-shadow:0px 1px 1px rgba(255,255,255,0.4);box-shadow: 0px 1px 1px rgba(255,255,255,0.4);cursor: pointer;}
.container a img{width: 480px;height: 300px;display: block;border: 0;}
.container .current{z-index: 2;}
.container .left{-webkit-transform: translateX(-350px) translateZ(-200px) rotateY(45deg);-moz-transform: translateX(-350px) translateZ(-200px) rotateY(45deg);z-index: 1;}
.container .right{-webkit-transform: translateX(350px) translateZ(-200px) rotateY(-45deg);-moz-transform: translateX(350px) translateZ(-200px) rotateY(-45deg);z-index: 1;}
.showing{opacity: 1;visibility: visible;}
.hiding{opacity: 0;visibility: hidden;}
.out-right{-webkit-transform: translateX(-450px) translateZ(-300px) rotateY(45deg);-moz-transform: translateX(-450px) translateZ(-300px) rotateY(45deg);z-index: 1;opacity: 0;visibility: hidden;}
.out-left{-webkit-transform: translateX(450px) translateZ(-300px) rotateY(-45deg);-moz-transform: translateX(450px) translateZ(-300px) rotateY(-45deg);z-index: 1;opacity: 0;visibility: hidden;}
.trans{-webkit-transition: all 1s ease-in-out;-moz-transition: all 1s ease-in-out;transition: all 1s ease-in-out;}