html - 如何在jQuery中创建左右按钮来移动产品轮播?
问题描述
调查并一点一点地整理我的代码,我已经实现了一个带有 mouseup 功能的轮播,它允许我通过按下鼠标左键而不释放它来移动产品,到目前为止它运行得很好,有时它仍然存在停滞不前,也就是说,如果我移动指针,则无需按下即可移动产品。
我想在我的代码中实现的是能够集成两个按钮,一个右一个左一个,也能够以这种方式移动轮播的产品。我怎样才能实现它,你能给我解释一下吗?
var direction_slider = "up";
var current_step = 0;
var scroll_product = false;
var scroll = -1;
$(function(){
// vars for clients list carousel
var $product_carousel = $('.slider');
var products = $product_carousel.children().length;
var product_width = (products * 140); // 140px width for each client item
$product_carousel.css('width',product_width);
var rotating = true;
//var product_speed = 1800;
//var see_products = setInterval(rotateClients, product_speed);
$(document).on({
mouseenter: function(){
rotating = false; // turn off rotation when hovering
},
mouseleave: function(){
rotating = true;
}
}, '#carousel');
$product_carousel.on("mousedown", function(e) {
scroll_product = true;
scroll = e.pageX;
event.preventDefault();
}).on("mouseup", function(e) {
scroll_product = false;
var num = Math.floor(Math.abs(scroll - e.pageX) / 140);
var dir = scroll - e.pageX < 0 ? "up" : "down";
for (var x = 0; x < num; x++) {
var $first = $('.slider .item:first');
var $last = $('.slider .item:last');
if (dir == "up") {
$last.prependTo(".slider");
} else {
$first.appendTo(".slider");
}
}
$(".slider").css("transform", "translate(0, 0)")
}).on("mousemove", function(e) {
if (scroll_product) {
$(".slider").css("transform", "translate(" + ( e.pageX - scroll ) +"px, 0)")
}
});
});
.carousel {
margin: 0 auto;
padding: 1em;
width: 100%;
max-width: 1170px;
margin-left: auto;
overflow: hidden;
}
.slider {
width: 100% !important;
display: flex;
}
.item {
display: inline-table;
width: 280px;
height: 325px;
margin: 0.5em;
border: 1px solid #ccc;
}
a {
color: #8563CF;
text-decoration: none;
font-weight: 100;
}
.thumbnail {
height: 150px;
position: relative;
}
.thumbnail img {
height: 100%;
width: 100%;
object-fit: cover;
object-position: 50% 15%;
}
img {
border: 0;
height: auto;
max-width: 100%;
vertical-align: middle;
}
.p1em {
padding: 1em;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<div class="carousel">
<div id="carousel">
<div class="slider" style="width: 280px; transform: translate(0px, 0px);">
<div class="item product">
<a href="#">
<div class="thumbnail image">
<img src="https://i.ytimg.com/vi/ZxrUVuOqsy0/maxresdefault.jpg">
</div>
<div class="box p1em">
<div class="heading ellipsis">
<h3>Prueba 1</h3>
</div>
<div class="author">
<span></span>
</div>
<div class="price right">
<p>
<label></label>
<em class="item-price">$40.130,00</em>
</p>
</div>
</div>
</a>
</div> <div class="item product">
<a href="#">
<div class="thumbnail image">
<img src="https://i.ytimg.com/vi/ZxrUVuOqsy0/maxresdefault.jpg">
</div>
<div class="box p1em">
<div class="heading ellipsis">
<h3>Curso de PHP 8 básico, intermedio y, avanzado. </h3>
</div>
<div class="author">
<span>Acaded</span>
</div>
<div class="purchased items-center">
<button>Ir al curso</button>
</div>
</div>
</a>
</div>
</div>
</div>
</div>
解决方案
这里的目标是将元素的顺序向左或向右移动。使用 jQuery,这非常容易。
逻辑是这样的:
要将顺序向右移动,请选择最后一项,将其删除,然后在第一项之前插入
要将顺序向左移动,请选择第一项,将其删除,然后在最后一项之后插入
为此,我们将click
事件侦听器附加到每个相应的按钮。我们使用选择器选择所有滑块项目$('.item.product')
,使用last()
andfirst()
获取第一个和最后一个项目,以及remove()
删除元素的功能。然后,为了重新排序,我们使用 jQueryinsertBefore()
和insertAfter()
.
这是结果:
$('#right').click(function() {
$('.item.product').last().remove().insertBefore($('.item.product').first());
})
$('#left').click(function() {
$('.item.product').first().remove().insertAfter($('.item.product').last());
})
其余的只是样式问题(注意:使用Material Icons作为箭头图标)。定义两个按钮元素;
<button id="left" class="nav-btn"><i class="material-icons">chevron_left</i></button>
<button id="right" class="nav-btn"><i class="material-icons">chevron_right</i></button>
“chevron_right”和“chevron_left”是图标名称 | 图标列表
将它们的位置设置为固定,这样当用户滚动时它们的位置就不会丢失。将top
属性设置为calc(50vh - 50px)
,其中50vh
是视口高度的一半,50px
是按钮的高度(使其恰好位于“中心”)。
一个完整的例子(最好在全页模式下查看):
var direction_slider = "up";
var current_step = 0;
var scroll_product = false;
var scroll = -1;
$(function() {
$('#right').click(function() {
$('.item.product').last().remove().insertBefore($('.item.product').first());
})
$('#left').click(function() {
$('.item.product').first().remove().insertAfter($('.item.product').last());
})
var $product_carousel = $('.slider');
var products = $product_carousel.children().length;
var product_width = (products * 140);
$product_carousel.css('width', product_width);
var rotating = true;
$(document).on({
mouseenter: function() {
rotating = false;
},
mouseleave: function() {
rotating = true;
}
}, '#carousel');
$product_carousel.on("mousedown", function(e) {
scroll_product = true;
scroll = e.pageX;
event.preventDefault();
}).on("mouseup", function(e) {
scroll_product = false;
var num = Math.floor(Math.abs(scroll - e.pageX) / 140);
var dir = scroll - e.pageX < 0 ? "up" : "down";
for (var x = 0; x < num; x++) {
var $first = $('.slider .item:first');
var $last = $('.slider .item:last');
if (dir == "up") {
$last.prependTo(".slider");
} else {
$first.appendTo(".slider");
}
}
$(".slider").css("transform", "translate(0, 0)")
}).on("mousemove", function(e) {
if (scroll_product) {
$(".slider").css("transform", "translate(" + (e.pageX - scroll) + "px, 0)")
}
});
});
/* button integration styling (start) */
#left {
left: 10px;
}
#right {
right: 10px;
}
.nav-btn {
position: fixed;
top: calc(50vh - 50px);
z-index: 100;
z-index: 100;
height: 50px;
width: 50px;
border-radius: 50%;
cursor: pointer;
background-color: white;
box-shadow: 0 0 1px black;
transition: 0.2s;
}
.nav-btn:hover {
background-color: #d1d1d1;
}
/* button integration styling (end) */
.carousel {
margin: 0 auto;
padding: 1em;
width: 100%;
max-width: 1170px;
margin-left: auto;
overflow: hidden;
}
.slider {
width: 100% !important;
display: flex;
}
.item {
display: inline-table;
width: 280px;
height: 325px;
margin: 0.5em;
border: 1px solid #ccc;
}
a {
color: #8563CF;
text-decoration: none;
font-weight: 100;
}
.thumbnail {
height: 150px;
position: relative;
}
.thumbnail img {
height: 100%;
width: 100%;
object-fit: cover;
object-position: 50% 15%;
}
img {
border: 0;
height: auto;
max-width: 100%;
vertical-align: middle;
}
.p1em {
padding: 1em;
}
<link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<div class="carousel">
<button id="left" class="nav-btn"><i class="material-icons">chevron_left</i></button>
<button id="right" class="nav-btn"><i class="material-icons">chevron_right</i></button>
<div id="carousel">
<div class="slider" style="width: 280px; transform: translate(0px, 0px);">
<div class="item product">
<a href="#">
<div class="thumbnail image">
<img src="https://i.ytimg.com/vi/ZxrUVuOqsy0/maxresdefault.jpg">
</div>
<div class="box p1em">
<div class="heading ellipsis">
<h3>Prueba 1</h3>
</div>
<div class="author">
<span></span>
</div>
<div class="price right">
<p>
<label></label>
<em class="item-price">$40.130,00</em>
</p>
</div>
</div>
</a>
</div>
<div class="item product">
<a href="#">
<div class="thumbnail image">
<img src="https://i.ytimg.com/vi/ZxrUVuOqsy0/maxresdefault.jpg">
</div>
<div class="box p1em">
<div class="heading ellipsis">
<h3>Curso de PHP 8 básico, intermedio y, avanzado. </h3>
</div>
<div class="author">
<span>Acaded</span>
</div>
<div class="purchased items-center">
<button>Ir al curso</button>
</div>
</div>
</a>
</div>
<div class="item product">
<a href="#">
<div class="thumbnail image">
<img src="https://www.gravatar.com/avatar/0fdacb141bca7fa57c392b5f03872176?s=96&d=identicon&r=PG&f=1">
</div>
<div class="box p1em">
<div class="heading ellipsis">
<h3>Spectric</h3>
</div>
<div class="author">
<span>Spectric</span>
</div>
<div class="purchased items-center">
<button>Check out</button>
</div>
</div>
</a>
</div>
</div>
</div>
</div>
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