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如何實(shí)現(xiàn)H5+CSS3手指滑動(dòng)切換圖片

發(fā)布時(shí)間:2021-05-24 09:27:10 來源:億速云 閱讀:319 作者:小新 欄目:web開發(fā)

這篇文章將為大家詳細(xì)講解有關(guān)如何實(shí)現(xiàn)H5+CSS3手指滑動(dòng)切換圖片,小編覺得挺實(shí)用的,因此分享給大家做個(gè)參考,希望大家閱讀完這篇文章后可以有所收獲。

包含3個(gè)文件:html、slider-H5.js、jquery.js。在html中可配置滑動(dòng)參數(shù)。具體代碼如下:

HTML代碼:

<!DOCTYPE HTML>
<html>
    
    <head>
        <meta charset="utf-8" />
        <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />
        <meta name="viewport" content="width=device-width, target-densitydpi=high-dpi, initial-scale=1.0, maximum-scale=1.0, user-scalable=no"
        />
        <meta name="apple-mobile-web-app-capable" content="yes" />
        <meta name="apple-mobile-web-app-status-bar-style" content="black" />
        <meta content="telephone=no" name="format-detection" />
        <meta name="keywords" content="seokeywords" />
        <meta name="description" content="seodescription" />
        <title>
            H5手指滑動(dòng)切換圖片
        </title>
        <style>
            ul,li{margin:0;padding:0;} @media screen and (min-width:240px) { html,
            body{ font-size:9px; } } @media screen and (min-width:320px) { html, body{
            font-size:12px; } } @media screen and (min-width:480px) { html, body{ font-size:18px;
            } } @media screen and (min-width:640px) { html, body{ font-size:24px; }
            } @media screen and (min-width:960px) { html, body{ font-size:36px; } }
            div.imgbox{width:25rem;height:16.5rem;overflow:hidden;margin:0 auto;} div.imgbox
            ul{clear:both;width:75rem;display: inline-block;} div.imgbox ul li{float:left;width:25rem;height:16.5rem;overflow:hidden;text-align:center;}
            div.imgbox ul li img{width:24rem;height:16.5rem;} #page{color:red;}
        </style>                   
    </head>
                                       
    <body>
        <div class="imgbox">
            <ul>
                <li>
                    <a href="#">
                        <img src="https://cache.yisu.com/upload/information/20210312/296/131167.jpg">
                        </img>
                    </a>
                </li>
                <li>                      
                    <a href="#">
                        <img src="https://cache.yisu.com/upload/information/20210312/296/131168.jpg">
                        </img>
                    </a>
                </li>
                <li>
                    <a href="#">
                        <img src="https://cache.yisu.com/upload/information/20210312/296/131169.jpg">
                        </img>
                    </a>
                </li>
            </ul>
        </div>
        <div>
            這里通過回調(diào)顯示當(dāng)前滾動(dòng)到多少頁:
            <span id="page">
                0
            </span>
        </div>
        <script src="jquery-1.10.2yuan.js">
        </script>
        <script src="slider-H5.js">
        </script>
        <script>
            (function() {
                /*
    注意:$.mggScrollImg返回的scrollImg對象上有
            next,prev,go三個(gè)方法,可以實(shí)現(xiàn)外部對滾動(dòng)索引的控制。
    如:scrollImg.next();//會切換到下一張圖片
        scrollImg.go(0);//會切換到第一張圖片
*/
                var scrollImg = $.mggScrollImg('.imgbox ul', {
                    loop: true,
                    //循環(huán)切換
                    auto: true,
                    //自動(dòng)切換
                    auto_wait_time: 3000,
                    //輪播間隔
                    scroll_time: 300,
                    //滾動(dòng)時(shí)長
                    callback: function(ind) { //這里傳過來的是索引值
                        $('#page').text(ind + 1);
                    }
                });
            })()
        </script>
    </body>

</html>

slider-H5.js 代碼:

(function($) {
    /*
        圖片滾動(dòng)效果
        @jQuery or @String box : 滾動(dòng)列表jQuery對象或者選擇器 如:滾動(dòng)元素為li的外層ul
        @object config : {
                @Number width : 一次滾動(dòng)寬度,默認(rèn)為box里面第一個(gè)一級子元素寬度[如果子元素寬度不均勻則滾動(dòng)效果會錯(cuò)亂]
                @Number size : 列表長度,默認(rèn)為box里面所有一級子元素個(gè)數(shù)[如果size不等于一級子元素個(gè)數(shù),則不支持循環(huán)滾動(dòng)]
                @Boolean loop : 是否支持循環(huán)滾動(dòng) 默認(rèn) true
                @Boolean auto : 是否自動(dòng)滾動(dòng),支持自動(dòng)滾動(dòng)時(shí)必須支持循環(huán)滾動(dòng),否則設(shè)置無效,默認(rèn)為true
                @Number auto_wait_time : 自動(dòng)輪播一次時(shí)間間隔,默認(rèn)為:3000ms
                @Function callback : 滾動(dòng)完回調(diào)函數(shù),參入一個(gè)參數(shù)當(dāng)前滾動(dòng)節(jié)點(diǎn)索引值
            }
    */
    function mggScrollImg(box, config) {
        this.box = $(box);
        this.config = $.extend({},
        config || {});
        this.width = this.config.width || this.box.children().eq(0).width(); //一次滾動(dòng)的寬度
        this.size = this.config.size || this.box.children().length;
        this.loop = this.config.loop !== undefined ? (this.config.loop == true ? true: false) : true; //默認(rèn)能循環(huán)滾動(dòng)
        this.auto = this.config.auto !== undefined ? (this.config.auto == true ? true: false) : true; //默認(rèn)自動(dòng)滾動(dòng)
        this.auto_wait_time = this.config.auto_wait_time || 3000; //輪播間隔
        this.scroll_time = this.config.scroll_time !== undefined ? (this.config.scroll_time > 0 ? this.config.scroll_time: 0) : 300; //滾動(dòng)時(shí)長
        this.minleft = -this.width * (this.size - 1); //最小left值,注意是負(fù)數(shù)[不循環(huán)情況下的值]
        this.maxleft = 0; //最大lfet值[不循環(huán)情況下的值]
        this.now_left = 0; //初始位置信息[不循環(huán)情況下的值]
        this.point_x = null; //記錄一個(gè)x坐標(biāo)
        this.point_y = null; //記錄一個(gè)y坐標(biāo)
        this.move_left = false; //記錄向哪邊滑動(dòng)
        this.index = 0;
        this.busy = false;
        this.timer;
        this.init();
    }                                     
    $.extend(mggScrollImg.prototype, {
        init: function() {
            this.bind_event();
            this.init_loop();
            this.auto_scroll();
        },
        bind_event: function() {
            var self = this;
            self.box.bind('touchstart',
            function(e) {
                var t = e.touches ? e.touches: e.originalEvent.targetTouches;
                if (t.length == 1 && !self.busy) {
                    self.point_x = t[0].screenX;
                    self.point_y = t[0].screenY;
                }
            }).bind('touchmove',
            function(e) {
                var t = e.touches ? e.touches: e.originalEvent.targetTouches;
                if (t.length == 1 && !self.busy) {
                    return self.move(t[0].screenX, t[0].screenY); //這里根據(jù)返回值覺得是否阻止默認(rèn)touch事件
                }
            }).bind('touchend',
            function(e) { ! self.busy && self.move_end();
            });
        },
        /*
            初始化循環(huán)滾動(dòng),當(dāng)一次性需要滾動(dòng)多個(gè)子元素時(shí),暫不支持循環(huán)滾動(dòng)效果,
            如果想實(shí)現(xiàn)一次性滾動(dòng)多個(gè)子元素效果,可以通過頁面結(jié)構(gòu)實(shí)現(xiàn)
            循環(huán)滾動(dòng)思路:復(fù)制首尾節(jié)點(diǎn)到尾首
        */
        init_loop: function() {
            if (this.box.children().length > 1 && this.box.children().length == this.size && this.loop) { //暫時(shí)只支持size和子節(jié)點(diǎn)數(shù)相等情況的循環(huán)
                this.now_left = -this.width; //設(shè)置初始位置信息
                this.minleft = -this.width * this.size; //最小left值
                this.maxleft = -this.width;
                this.box.prepend(this.box.children().eq(this.size - 1).clone()).append(this.box.children().eq(1).clone()).css(this.get_style(2));
                this.box.css('width', this.width * (this.size + 2));
            } else {
                this.loop = false;
                this.box.css('width', this.width * this.size);
            }                           
        },
        auto_scroll: function() { //自動(dòng)滾動(dòng)
            var self = this;
            if (!self.auto) return;
            clearTimeout(self.timer);
            self.timer = setTimeout(function() {
                self.go_index(self.index + 1);
            },
            self.auto_wait_time);
        },
        go_index: function(ind) { //滾動(dòng)到指定索引頁面
            var self = this;
            if (self.busy) return;
            clearTimeout(self.timer);
            self.busy = true;
            if (self.loop) { //如果循環(huán)
                ind = ind < 0 ? -1 : ind;
                ind = ind > self.size ? self.size: ind;
            } else {
                ind = ind < 0 ? 0 : ind;
                ind = ind >= self.size ? (self.size - 1) : ind;
            }
            if (!self.loop && (self.now_left == -(self.width * ind))) {
                self.complete(ind);
            } else if (self.loop && (self.now_left == -self.width * (ind + 1))) {
                self.complete(ind);
            } else {
                if (ind == -1 || ind == self.size) { //循環(huán)滾動(dòng)邊界
                    self.index = ind == -1 ? (self.size - 1) : 0;
                    self.now_left = ind == -1 ? 0 : -self.width * (self.size + 1);
                } else {
                    self.index = ind;
                    self.now_left = -(self.width * (self.index + (self.loop ? 1 : 0)));
                }
                self.box.css(this.get_style(1));
                setTimeout(function() {
                    self.complete(ind);
                },
                self.scroll_time);
            }
        },
        complete: function(ind) { //動(dòng)畫完成回調(diào)
            var self = this;
            self.busy = false;
            self.config.callback && self.config.callback(self.index);
            if (ind == -1) {
                self.now_left = self.minleft;
            } else if (ind == self.size) {
                self.now_left = self.maxleft;
            }
            self.box.css(this.get_style(2));
            self.auto_scroll();
        },
        next: function() { //下一頁滾動(dòng)
            if (!this.busy) {
                this.go_index(this.index + 1);
            }
        },
        prev: function() { //上一頁滾動(dòng)
            if (!this.busy) {
                this.go_index(this.index - 1);
            }                                     },
        move: function(point_x, point_y) { //滑動(dòng)屏幕處理函數(shù)
            var changeX = point_x - (this.point_x === null ? point_x: this.point_x),
            changeY = point_y - (this.point_y === null ? point_y: this.point_y),
            marginleft = this.now_left,
            return_value = false,
            sin = changeY / Math.sqrt(changeX * changeX + changeY * changeY);
            this.now_left = marginleft + changeX;
            this.move_left = changeX < 0;
            if (sin > Math.sin(Math.PI / 3) || sin < -Math.sin(Math.PI / 3)) { //滑動(dòng)屏幕角度范圍:PI/3  -- 2PI/3
                return_value = true; //不阻止默認(rèn)行為
            }
            this.point_x = point_x;
            this.point_y = point_y;
            this.box.css(this.get_style(2));
            return return_value;
        },
        move_end: function() {
            var changeX = this.now_left % this.width,
            ind;
            if (this.now_left < this.minleft) { //手指向左滑動(dòng)
                ind = this.index + 1;
            } else if (this.now_left > this.maxleft) { //手指向右滑動(dòng)
                ind = this.index - 1;
            } else if (changeX != 0) {
                if (this.move_left) { //手指向左滑動(dòng)
                    ind = this.index + 1;
                } else { //手指向右滑動(dòng)
                    ind = this.index - 1;
                }
            } else {
                ind = this.index;
            }
            this.point_x = this.point_y = null;
            this.go_index(ind);
        },
        /*
            獲取動(dòng)畫樣式,要兼容更多瀏覽器,可以擴(kuò)展該方法
            @int fig : 1 動(dòng)畫 2  沒動(dòng)畫
        */
        get_style: function(fig) {
            var x = this.now_left,
            time = fig == 1 ? this.scroll_time: 0;
            return {
                '-webkit-transition': '-webkit-transform ' + time + 'ms',
                '-webkit-transform': 'translate3d(' + x + 'px,0,0)',
                '-webkit-backface-visibility': 'hidden',
                'transition': 'transform ' + time + 'ms',
                'transform': 'translate3d(' + x + 'px,0,0)'
            };
        }           

    });
    /*
        這里對外提供調(diào)用接口,對外提供接口方法
        next :下一頁
        prev :上一頁
        go :滾動(dòng)到指定頁
    */
    $.mggScrollImg = function(box, config) {
        var scrollImg = new mggScrollImg(box, config);
        return { //對外提供接口
            next: function() {
                scrollImg.next();
            },
            prev: function() {
                scrollImg.prev();
            },
            go: function(ind) {
                scrollImg.go_index(parseInt(ind) || 0);
            }
        }
    }
})(jQuery)

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