幻燈片（響應式設計）（jquery實現）

時間 2019-12-17

原文原文鏈接

Html代碼：javascript

<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>detail</title>
	<meta name="viewport" content="initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
	<link rel="stylesheet" href="/Style/detail.css">
	<script type="text/javascript" src="/Javascript/jquery.js"></script>
	<script type="text/javascript" src="/Javascript/detail.js"></script>
	<script type="text/javascript">
		$(document).ready(function(){
	  		$.focus(".slider");
		});
	</script>
</head>
<body>
	<div class="main">
		     <div class="slider">
                <ul>
                    <li><a href="javascript:void(0);" type='0'>
                        <img src="http://img.17u.cn/ly/cn/img/zizhuyou/rimage/500_270/2014/9/11/201409110148547940.jpg" ></a></li>
                    <li><a href="javascript:void(0);" type='0'>
                        <img src="http://img.17u.cn/ly/cn/img/zizhuyou/rimage/500_270/2014/10/14/201410140439098138.jpg"></a></li>
                    <li><a href="javascript:void(0);" type='0'>
                        <img src="http://img.17u.cn/ly/cn/img/zizhuyou/rimage/500_270/2014/1/21/201401211150391745.jpg"></a></li>
                </ul>
            </div>
	</div>
</body>
</html>

css代碼：css

*{margin: 0;padding: 0;}
ul{ list-style:none;}
body {
    -webkit-tap-highlight-color: transparent;
    -webkit-font-smoothing: antialiased;
    -webkit-user-select: none;
    -moz-user-select: none;
    font-size: 14px;
	line-height: 1.5;
	color: #333;
	font-family: arial,sans-serif;
	margin: 0 auto;
	max-width: 640px;
}
.main {
    background: #f0f0f0;
    width: 100%;
}
/* 如下特效CSS */
.slider {width:100%;  margin:0 auto; overflow:hidden; position:relative;}
.slider ul { position:relative;width: 100%;}
.slider li:first-child {position: static;}
.slider ul li {  overflow:hidden; position:absolute; background:#000; top:0px; width: 100%; }
.slider ul li img {border:0;width: 100%;display: block;}
.slider ul li div {position:absolute; overflow:hidden;}
.slider .btnBg {position:absolute; width:100%; height:20px; left:0; bottom:0; background:#000; display:none;}
.slider .btn {position:absolute; width:95%; height:23px; padding:0px 10px 0px 10px; right:0; bottom:6px; text-align:right;}
.slider .btn span {display:inline-block; _display:inline; _zoom:1; width:25px; height:24px; line-height:24px; text-align:center; _font-size:0; margin-left:5px; cursor:pointer; background:#fff;}
.slider .btn span.on {background:#fff;}

　　javascript代碼：html

$(function() {
	jQuery.focus = function(slid) {
		var sWidth = $(slid).width(); //獲取焦點圖的寬度（顯示面積）
		var len = $(slid).find("ul li").length; //獲取焦點圖個數
		var index = 0;
		var picTimer;
		
		//如下代碼添加數字按鈕和按鈕後的半透明條，還有上一頁、下一頁兩個按鈕
		var btn = "<div class='btnBg'></div><div class='btn'>";
		for(var i=0; i < len; i++) {
			var ii = i+1;
			btn += "<span>"+ii+"</span>";
		}
		//btn += "</div><div class='preNext pre'></div><div class='preNext next'></div>";
		$(slid).append(btn);
		$(slid).find("div.btnBg").css("opacity",0.5);
	
		//爲小按鈕添加鼠標滑入事件，以顯示相應的內容
		$(slid+" div.btn span").css("opacity",0.4).mouseenter(function() {
			index = $(slid+" .btn span").index(this);
			showPics(index);
		}).eq(0).trigger("mouseenter");
	
		//上一頁、下一頁按鈕透明度處理
		$(slid+" .preNext").css("opacity",0.2).hover(function() {
			$(this).stop(true,false).animate({"opacity":"0.5"},300);
		},function() {
			$(this).stop(true,false).animate({"opacity":"0.2"},300);
		});
	
		//上一頁按鈕
		/*$(slid+" .pre").click(function() {
			index -= 1;
			if(index == -1) {index = len - 1;}
			showPics(index);
		});
	
		//下一頁按鈕
		$(slid+" .next").click(function() {
			index += 1;
			if(index == len) {index = 0;}
			showPics(index);
		});*/
	
		//本例爲左右滾動，即全部li元素都是在同一排向左浮動，因此這裏須要計算出外圍ul元素的寬度
		//$(slid+" ul").css("width",sWidth * (len));
		//$(slid+" ul li").css("width",sWidth);
		$(slid+" ul li").each(function(index, el) {
			$(this).css("left",index*sWidth);
		});
		
		//鼠標滑上焦點圖時中止自動播放，滑出時開始自動播放
		$(slid).hover(function() {
			clearInterval(picTimer);
		},function() {
			picTimer = setInterval(function() {
				showPics(index);
				index++;
				if(index == len) {index = 0;}
			},2000); //此4000表明自動播放的間隔，單位：毫秒
		}).trigger("mouseleave");
		
		//顯示圖片函數，根據接收的index值顯示相應的內容
		function showPics(index) { //普通切換
			var nowLeft = -index*sWidth; //根據index值計算ul元素的left值
			$(slid+" ul").stop(true,false).animate({"margin-left":nowLeft},300); //經過animate()調整ul元素滾動到計算出的position
			$(slid+" .btn span").removeClass("on").eq(index).addClass("on"); //爲當前的按鈕切換到選中的效果
			$(slid+" .btn span").stop(true,false).animate({"opacity":"0.4"},300).eq(index).stop(true,false).animate({"opacity":"1"},300); //爲當前的按鈕切換到選中的效果
		}
	
	};
	
});