怎样实现H5+CSS3手指滑动切换图片的示例代码
(编辑：jimmy 日期: 2024/11/2 浏览：3 次 )
包含3个文件：html、slider-H5.js、jquery.js。在html中可配置滑动参数。具体代码如下：
HTML代码：
<!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手指滑动切换图片
</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="http://y2.ifengimg.com/df84c07b46e03f8e/2014/0512/rdn_53708f3d8533e.jpg">
</img>
</a>
</li>
<li>
<a href="#">
<img src="http://y2.ifengimg.com/df84c07b46e03f8e/2014/0512/rdn_53708f23aad06.jpg">
</img>
</a>
</li>
<li>
<a href="#">
<img src="http://y2.ifengimg.com/df84c07b46e03f8e/2014/0512/rdn_53708f345282b.jpg">
</img>
</a>
</li>
</ul>
</div>
<div>
这里通过回调显示当前滚动到多少页:
<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对象上有
next，prev，go三个方法，可以实现外部对滚动索引的控制。
如：scrollImg.next();//会切换到下一张图片
scrollImg.go(0);//会切换到第一张图片
*/
var scrollImg = $.mggScrollImg('.imgbox ul', {
loop: true,
//循环切换
auto: true,
//自动切换
auto_wait_time: 3000,
//轮播间隔
scroll_time: 300,
//滚动时长
callback: function(ind) { //这里传过来的是索引值
$('#page').text(ind + 1);
}
});
})()
</script>
</body>
</html>
slider-H5.js 代码：
(function($) {
/*
图片滚动效果
@jQuery or @String box : 滚动列表jQuery对象或者选择器 如：滚动元素为li的外层ul
@object config : {
@Number width : 一次滚动宽度，默认为box里面第一个一级子元素宽度[如果子元素宽度不均匀则滚动效果会错乱]
@Number size : 列表长度，默认为box里面所有一级子元素个数[如果size不等于一级子元素个数，则不支持循环滚动]
@Boolean loop : 是否支持循环滚动 默认 true
@Boolean auto : 是否自动滚动,支持自动滚动时必须支持循环滚动，否则设置无效,默认为true
@Number auto_wait_time : 自动轮播一次时间间隔,默认为：3000ms
@Function callback : 滚动完回调函数，参入一个参数当前滚动节点索引值
}
*/
function mggScrollImg(box, config) {
this.box = $(box);
this.config = $.extend({},
config || {});
this.width = this.config.width || this.box.children().eq(0).width(); //一次滚动的宽度
this.size = this.config.size || this.box.children().length;
this.loop = this.config.loop !== undefined ? (this.config.loop == true ? true: false) : true; //默认能循环滚动
this.auto = this.config.auto !== undefined ? (this.config.auto == true ? true: false) : true; //默认自动滚动
this.auto_wait_time = this.config.auto_wait_time || 3000; //轮播间隔
this.scroll_time = this.config.scroll_time !== undefined ? (this.config.scroll_time > 0 ? this.config.scroll_time: 0) : 300; //滚动时长
this.minleft = -this.width * (this.size - 1); //最小left值，注意是负数[不循环情况下的值]
this.maxleft = 0; //最大lfet值[不循环情况下的值]
this.now_left = 0; //初始位置信息[不循环情况下的值]
this.point_x = null; //记录一个x坐标
this.point_y = null; //记录一个y坐标
this.move_left = false; //记录向哪边滑动
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); //这里根据返回值觉得是否阻止默认touch事件
}
}).bind('touchend',
function(e) { ! self.busy && self.move_end();
});
},
/*
初始化循环滚动,当一次性需要滚动多个子元素时，暂不支持循环滚动效果,
如果想实现一次性滚动多个子元素效果，可以通过页面结构实现
循环滚动思路：复制首尾节点到尾首
*/
init_loop: function() {
if (this.box.children().length > 1 && this.box.children().length == this.size && this.loop) { //暂时只支持size和子节点数相等情况的循环
this.now_left = -this.width; //设置初始位置信息
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() { //自动滚动
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) { //滚动到指定索引页面
var self = this;
if (self.busy) return;
clearTimeout(self.timer);
self.busy = true;
if (self.loop) { //如果循环
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) { //循环滚动边界
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) { //动画完成回调
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() { //下一页滚动
if (!this.busy) {
this.go_index(this.index + 1);
}
},
prev: function() { //上一页滚动
if (!this.busy) {
this.go_index(this.index - 1);
} },
move: function(point_x, point_y) { //滑动屏幕处理函数
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)) { //滑动屏幕角度范围：PI/3 -- 2PI/3
return_value = true; //不阻止默认行为
}
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) { //手指向左滑动
ind = this.index + 1;
} else if (this.now_left > this.maxleft) { //手指向右滑动
ind = this.index - 1;
} else if (changeX != 0) {
if (this.move_left) { //手指向左滑动
ind = this.index + 1;
} else { //手指向右滑动
ind = this.index - 1;
}
} else {
ind = this.index;
}
this.point_x = this.point_y = null;
this.go_index(ind);
},
/*
获取动画样式，要兼容更多浏览器，可以扩展该方法
@int fig : 1 动画 2 没动画
*/
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)'
};
}
});
/*
这里对外提供调用接口，对外提供接口方法
next ：下一页
prev ：上一页
go ：滚动到指定页
*/
$.mggScrollImg = function(box, config) {
var scrollImg = new mggScrollImg(box, config);
return { //对外提供接口
next: function() {
scrollImg.next();
},
prev: function() {
scrollImg.prev();
},
go: function(ind) {
scrollImg.go_index(parseInt(ind) || 0);
}
}
}
})(jQuery)
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