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Multifunctional carousel carousel example

高洛峰

Nov 05, 2016 pm 03:05 PM

JavaScript css html

今天项目需要用到旋转木马轮播功能，需要显示个可以切换的选项，这几个选项也许是图片，也许是文字，也许是一个iframe页面，也有可能是图文混排，还可能需要支持调用接口数据，需要显示多条信息，最少3条，最多不限，可能有10条，可能有10000条，于是就有了下面这个实现方法，看上去已经很完美了（样式和具体显示图片、文字或者是iframe页面、图文混排、调用接口数据等请自行在此实例基础上调试）

Multifunctional carousel carousel example

需要说明的是预先显示：2 1 9，是因为一共有9张图片，默认显示第一张在中间，往右是2，背后那张是3，不过背后那张无需进行设置。这是视觉初始的效果，可根据自己需要调整。

carrousel.html

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>旋转木马轮播</title>
<style type="text/css">
html, body {
    width: 100%;
    height: 100%;
}
.carrousel .arrow_left {
    background: #000;
    left: 20px;
}
.carrousel .arrow_right {
    background: #000;
    right: 20px;
}
.carrousel .arrow_left, .carrousel .arrow_right {
    position: absolute;
    top: 50%;
    width: 50px;
    line-height: 50px;
    height: 50px;
    text-align: center;
    color: #FFF;
    cursor: pointer;
}
.carrousel .back {
    z-index: 1;
    opacity: 0.3;
    margin: auto;
    width: 10%;
    height: 60px;
    left: 45%;
}
.carrousel .left {
    left: 10%;
}
.carrousel .right {
    right: 10%;
}
.carrousel .left, .carrousel .right {
    top: 53%;
    width: 60px;
    height: 60px;
    z-index: 2;
    opacity: 0.5;
}
.carrousel .front {
    left: 45%;
    top: 50%;
    margin: auto;
    width: 10%;
    height: 100px;
    z-index: 3;
    opacity: 1;
}
.carrousel .front, .carrousel .right, .carrousel .back, .carrousel .left, .carrousel .content {
    position: absolute;
    background: #666;
    text-align: center;
    color: #FFF;
    font-size: 20px;
}
.carrousel .content {
    width: 100%;
    top: 80%;
    text-align: center;
    color: #fff;
    margin: auto;
}
</style>
<script type="text/javascript" src="http://code.jquery.com/jquery-1.8.1.js"></script>
<script type="text/javascript">
//页面加载完成后
$(document).ready(function(e) {

    //复制一个旋转木马轮播
    var a = carrousel;

    //初始化
    a.init($("#carrousel_a"), [
        ["1", "这是第一张图或内容", "1.jpg"],
        ["2", "这是第二张图或内容", "2.jpg"],
        ["3", "这是第三张图或内容", "3.jpg"],
        ["4", "这是第四张图或内容", "4.jpg"],
        ["5", "这是第五张图或内容", "5.jpg"],
        ["6", "这是第六张图或内容", "6.jpg"],
        ["7", "这是第七张图或内容", "7.jpg"],
        ["8", "这是第八张图或内容", "8.jpg"],
        ["9", "这是第九张图或内容", "9.jpg"]
    ]);

    //左边箭头点击
    $("#carrousel_a .arrow_left").click(function() {
        a.rotate("left");
    });

    //右边箭头点击
    $("#carrousel_a .arrow_right").click(function() {
        a.rotate("right");
    });

});

/**
 * carrousel.js - v1.0.0 (2016-11-5)
 *
 * 旋转木马轮播
 * by tie. qq：2185987263
 *
 * Copyright (C) 2016, tie.
 * All rights reserved.
 *
 **/

var carrousel = {

    //>3~n
    data: [],

    obj: null,

    //初始化
    data_count: 0,
    init: function(obj, data) {

        var self = this;

        self.obj = obj;
        self.data = data;

        //左边图片计数器
        self.left_img_count = self.data.length - 1;

        //右边图片计数器
        self.right_img_count = 2;

        //数据计数器
        self.data_count = 0;

        //文字或图片
        self.obj.find(".left").html(self.data[1][0]);
        //car_back的top一定要是最大得
        self.obj.find(".back").css({
            "top": self.obj.find(".left").offset().top + 1
        });
        self.obj.find(".right").html(self.data[self.left_img_count][0][0]);
        self.obj.find(".front").html(self.data[0][0]);
        self.obj.find(".content").html(self.data[0][1]);
    },

    //往左旋转
    left_img_count: null,
    left_img_up: function() {

        var self = this;

        self.left_img_count--;
        if (self.left_img_count < 0) {
            self.left_img_count = self.data.length - 1;
        }

        var t, id;
        self.obj.find(".is_horse").each(function(i) {
            if (i > 0) {
                if ($(this).offset().top > t) {
                    id = $(this).attr("data-horse");
                    t = $(this).offset().top;
                }
            } else {
                id = $(this).attr("data-horse");
                t = $(this).offset().top;
            }
        });

        self.obj.find("." + id).html(self.data[self.left_img_count][0]);
        if (self.left_img_count <= 0) {
            self.left_img_count = self.data.length;
        }

        self.right_img_count--;
        if (self.right_img_count <= 0) {
            self.right_img_count = self.data.length;
        }

        self.show_content("left");

    },

    //往右旋转
    right_img_count: null,
    right_img_up: function() {

        var self = this;

        self.left_img_count++;
        if (self.left_img_count >= self.data.length) {
            self.left_img_count = 0;
        }
        if (self.right_img_count >= self.data.length) {
            self.right_img_count = 0;
        }

        var t, id;
        self.obj.find(".is_horse").each(function(i) {
            if (i > 0) {
                if ($(this).offset().top > t) {
                    id = $(this).attr("data-horse");
                    t = $(this).offset().top;
                }
            } else {
                id = $(this).attr("data-horse");
                t = $(this).offset().top;
            }
        });

        self.obj.find("." + id).html(self.data[self.right_img_count][0]);

        self.right_img_count++;

        self.show_content("right");
    },

    //显示内容
    show_content: function(direction) {

        var self = this;

        if (direction == "left") {
            self.data_count--;
            if (self.data_count < 0) {
                self.data_count = self.data.length - 1;
            }
        }

        if (direction == "right") {
            self.data_count++;
            if (self.data_count >= self.data.length) {
                self.data_count = 0;
            }
        }

        self.obj.find(".content").animate({
            opacity: 0
        }, 500, &#39;&#39;, function() {
            self.obj.find(".content").html(self.data[self.data_count][1]).animate({
                opacity: 1
            }, 500);
        });
    },

    //旋转
    direction_lock: false,
    rotate: function(direction) {

        var self = this;

        if (self.direction_lock) {
            return false;
        }
        self.direction_lock = true;

        var ol = self.obj.find(".left"),
            ob = self.obj.find(".back"),
            or = self.obj.find(".right"),
            of = self.obj.find(".front"),
            t1 = "opacity";
        t2 = "z-index";

        var l_l = ol.offset().left,
            l_t = ol.offset().top,
            l_w = ol.width(),
            l_h = ol.height(),
            l_o = ol.css(t1),
            l_z = ol.css(t2),

            r_l = or.offset().left,
            r_t = or.offset().top,
            r_w = or.width(),
            r_h = or.height(),
            r_o = or.css(t1),
            r_z = or.css(t2),

            b_l = ob.offset().left,
            b_t = ob.offset().top,
            b_w = ob.width(),
            b_h = ob.height(),
            b_o = ob.css(t1),
            b_z = ob.css(t2),

            f_l = of.offset().left,
            f_t = of.offset().top,
            f_w = of.width(),
            f_h = of.height(),
            f_o = of.css(t1),
            f_z = of.css(t2);

        var _l_l, _l_t, _l_w, _l_h, _r_l, _r_t, _r_w, _r_h, _b_l, _b_t, _b_w, _b_h, _f_l, _f_t, _f_w, _f_h;

        if (direction == "left") {
            self.left_img_up();
            _f_l = l_l, _f_t = l_t, _f_w = l_w, _f_h = l_h, _f_o = l_o, _f_z = l_z;
            _b_l = r_l, _b_t = r_t, _b_w = r_w, _b_h = r_h, _b_o = r_o, _b_z = r_z;
            _r_l = f_l, _r_t = f_t, _r_w = f_w, _r_h = f_h, _r_o = f_o, _r_z = f_z;
            _l_l = b_l, _l_t = b_t, _l_w = b_w, _l_h = b_h, _l_o = b_o, _l_z = b_z;
        }
        if (direction == "right") {
            self.right_img_up();
            _f_l = r_l, _f_t = r_t, _f_w = r_w, _f_h = r_h, _f_o = r_o, _f_z = r_z;
            _b_l = l_l, _b_t = l_t, _b_w = l_w, _b_h = l_h, _b_o = l_o, _b_z = l_z;
            _r_l = b_l, _r_t = b_t, _r_w = b_w, _r_h = b_h, _r_o = b_o, _r_z = b_z;
            _l_l = f_l, _l_t = f_t, _l_w = f_w, _l_h = f_h, _l_o = f_o, _l_z = f_z;
        }
        ol.animate({
            width: _l_w,
            height: _l_h,
            left: _l_l,
            top: _l_t,
            opacity: _l_o,
            zIndex: _l_z
        }, 500);
        ob.animate({
            width: _b_w,
            height: _b_h,
            left: _b_l,
            top: _b_t,
            opacity: _b_o,
            zIndex: _b_z
        }, 500);
        or.animate({
            width: _r_w,
            height: _r_h,
            left: _r_l,
            top: _r_t,
            opacity: _r_o,
            zIndex: _r_z
        }, 500);
        of.animate({
            width: _f_w,
            height: _f_h,
            left: _f_l,
            top: _f_t,
            opacity: _f_o,
            zIndex: _f_z
        }, 500, &#39;&#39;, function() {
            self.direction_lock = false;
        });
    }
}
</script>
</head>

<body>
<div id="carrousel_a" class="carrousel">
  <div class="arrow_left"><</div>
  <div class="arrow_right">></div>
  <div class="left is_horse" data-horse="left"></div>
  <div class="back is_horse" data-horse="back"></div>
  <div class="right is_horse" data-horse="right"></div>
  <div class="front is_horse" data-horse="front"></div>
  <div class="content"></div>
</div>
</body>
</html>

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