H5实现滑动切换图片功能
程序员文章站
2022-07-07 15:37:52
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页面代码
下面是js外部代码：
核心代码参考：https://www.cnblogs.com/yinluhui0229/p/4864645.html
但是离我想要的效果还差一点，就是在底部需要有几个小点来，标注当前在第几页，还剩几张图，所以对代码做了小部分改动，写的不好，大神轻拍
最终效果件附件图片
<!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;}*/
div.imgbox {
width: 100%;
height: 100%;
overflow: hidden;
margin: 0 auto;
}
div.imgbox ul {
clear: both;
width: 32.5rem;
display: inline-block;
}
div.imgbox ul li {
float: left;
width: 32.5rem;
height: 100%;
overflow: hidden;
text-align: center;
}
div.imgbox ul li img {
width: 32.5rem;
height: 95%;
}
#page {
color: red;
}
#active {
width: 100%;
text-align: center;
}
#active label {
display: inline-block;
width: 10px;
height: 10px;
border-radius: 5px;
background: #bbb;
border-color: #777;
}
#active label:hover {
background: #ccc;
}
</style>
</head>
<body>
<div class="imgbox">
<ul>
<li>
<a href="#"><img src="img/111.jpg"></img>
</a>
</li>
<li>
<a href="#"><img src="img/222.jpg"></img>
</a>
</li>
<li>
<a href="#"><img src="img/333.jpg"></img>
</a>
</li>
<li>
<a href="#"><img src="img/444.jpg"></img>
</a>
</li>
</ul>
</div>
<div id="active">
<ul>
<li>
<label id="lable1"></label>
<label id="lable2"></label>
<label id="lable3"></label>
<label id="lable4"></label>
</li>
</ul>
</div>
<div hidden="true">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-1.11.1.min.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: false, //循环切换
auto: false, //自动切换
auto_wait_time: 3000, //轮播时间
scroll_time: 300, //滚动时长
callback: function(ind) { //这里是传过来的索引值
$('#page').text(ind + 1);
if($('#page').text()== 1)
{
$('#lable1').css("background-color","#333");
$('#lable2').css("background-color","#ccc");
$('#lable3').css("background-color","#ccc");
$('#lable4').css("background-color","#ccc");
}
if($('#page').text() == 2)
{
$('#lable1').css("background-color","#ccc");
$('#lable2').css("background-color","#333");
$('#lable3').css("background-color","#ccc");
$('#lable4').css("background-color","#ccc");
}
if($('#page').text() == 3)
{
$('#lable1').css("background-color","#ccc");
$('#lable2').css("background-color","#ccc");
$('#lable3').css("background-color","#333");
$('#lable4').css("background-color","#ccc");
}
if($('#page').text() == 4)
{
$('#lable1').css("background-color","#ccc");
$('#lable2').css("background-color","#ccc");
$('#lable3').css("background-color","#ccc");
$('#lable4').css("background-color","#333");
}
}
});
})()
</script>
</body>
</html>
下面是js外部代码：
(function($){
/*
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)
核心代码参考：https://www.cnblogs.com/yinluhui0229/p/4864645.html
但是离我想要的效果还差一点，就是在底部需要有几个小点来，标注当前在第几页，还剩几张图，所以对代码做了小部分改动，写的不好，大神轻拍
最终效果件附件图片
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