【发布时间】：2023-04-01 11:57:02
【问题描述】：
我刚刚完成了一个我一直在做的轮播，它使用滑动/触摸，还使用 prev/next 等控件来控制轮播。现在我有一个关于轮播行为的问题。基本上我试图让它一张一张地滑动。这是我一直在处理的代码示例。现在它似乎在滑动 2 或 3，具体取决于我放置了多少轮播。
我也有一个关于使它也响应的问题
function fCarousel() {
// var activeSlide = 0;
// $('.faculty-carousel').attr('data-slide', '0');
var viewPortSize = $(window).width(),
facultyPanel = $('.faculty-carousel .faculty-items li'),
profileCount = facultyPanel.length,
activeSlide = 0,
carousel = $('.faculty-carousel .faculty-items');
$('.faculty-carousel').attr('data-slide', '0');
//Set Panel Size based on viewport
if (viewPortSize <= 1920 ) {
var profilePanelSize = viewPortSize / 5
}
if (viewPortSize < 1024 ) {
var profilePanelSize = viewPortSize / 4
}
if (viewPortSize < 768 ) {
var profilePanelSize = viewPortSize / 3
}
if (viewPortSize < 480 ) {
var profilePanelSize = viewPortSize
}
carousel.outerWidth( profilePanelSize * profileCount );
facultyPanel.outerWidth(profilePanelSize);
carousel.css('transform', 'translateX(' + 0 + '% )');
$('.prev').on('click', function(e) {
event.stopPropagation();
var carouselWrapper = $(this).closest('.faculty-carousel'),
facultyProfilePanel = carouselWrapper.find('.faculty-items li'),
facultyProfileCount = facultyProfilePanel.length,
viewPortSize = $(window).width(),
carousel = carouselWrapper.find('.faculty-items'),
position = 0,
currentSlide = parseInt(carouselWrapper.attr('data-slide'));
// Check if data-slide attribute is greater than 0
if (currentSlide > 0) {
// Decremement current slide
currentSlide--;
// Assign CSS position to clicked slider
var transformPercentage = -1 * currentSlide / facultyProfileCount * 100;
carousel.css('transform', 'translateX(' + transformPercentage + '% )');
// Update data-slide attribute
carouselWrapper.attr('data-slide', currentSlide);
activeSlide = currentSlide;
}
});
$('.next').on('click', function(e) {
event.stopPropagation();
// store variable relevent to clicked slider
var carouselWrapper = $(this).closest('.faculty-carousel'),
facultyProfilePanel = carouselWrapper.find('.faculty-items li'),
facultyProfileCount = facultyProfilePanel.length,
viewPortSize = $(window).width(),
carousel = carouselWrapper.find('.faculty-items'),
position = 0,
currentSlide = parseInt(carouselWrapper.attr('data-slide'));
// Check if dataslide is less than the total slides
if (currentSlide < facultyProfileCount - 1) {
// Increment current slide
currentSlide++;
// Assign CSS position to clicked slider
var transformPercentage = -1 * currentSlide / facultyProfileCount * 100;
carousel.css('transform', 'translateX(' + transformPercentage + '% )');
// Update data-slide attribute
carouselWrapper.attr('data-slide', currentSlide);
activeSlide = currentSlide;
}
})
$('.faculty-carousel .faculty-items').each(function() {
// create a simple instance
// by default, it only adds horizontal recognizers
var direction;
var touchSlider = this;
var mc = new Hammer.Manager(this),
itemLength = $(this).find('li').length,
count = 0,
slide = $(this),
timer;
var sliderWrapper = slide,
slideItems = sliderWrapper.find('li'),
//slider = sliderWrapper.find('li'),
totalPanels = slideItems.length,
currentSlide = parseInt(sliderWrapper.attr('data-slide'));
// mc.on("panleft panright", function(ev) {
// direction = ev.type;
// });
mc.add(new Hammer.Pan({
threshold: 0,
pointers: 0
}))
mc.on('pan', function(e) {
var percentage = 100 / totalPanels * e.deltaX / window.innerWidth;
var transformPercentage = percentage - 100 / totalPanels * activeSlide;
touchSlider.style.transform = 'translateX( ' + transformPercentage + '% )';
var sliderWrapper = $(e.target).closest('.faculty-carousel')
if (e.isFinal) { // NEW: this only runs on event end
var newSlide = activeSlide;
if (percentage < 0)
newSlide = activeSlide + 1;
else if (percentage > 0)
newSlide = activeSlide - 1;
goToSlide(newSlide, sliderWrapper);
}
});
var goToSlide = function(number, sliderWrapper) {
if (number < 0)
activeSlide = 0;
else if (number > totalPanels - 1)
activeSlide = totalPanels - 1
else
activeSlide = number;
sliderWrapper.attr('data-slide', activeSlide);
touchSlider.classList.add('slide-animation');
var percentage = -(100 / totalPanels) * activeSlide;
touchSlider.style.transform = 'translateX( ' + percentage + '% )';
timer = setTimeout(function() {
touchSlider.classList.remove('slide-animation');
}, 400);
};
});
}
$(document).ready(function() {
fCarousel();
})
$(window).on('resize', function(){
fCarousel();
})/* http://meyerweb.com/eric/tools/css/reset/
v2.0 | 20110126
License: none (public domain)
*/
html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed,
figure, figcaption, footer, header, hgroup,
menu, nav, output, ruby, section, summary,
time, mark, audio, video {
margin: 0;
padding: 0;
border: 0;
font-size: 100%;
font: inherit;
vertical-align: baseline;
}
/* HTML5 display-role reset for older browsers */
article, aside, details, figcaption, figure,
footer, header, hgroup, menu, nav, section {
display: block;
}
body {
line-height: 1;
}
ol, ul {
list-style: none;
}
blockquote, q {
quotes: none;
}
blockquote:before, blockquote:after,
q:before, q:after {
content: '';
content: none;
}
table {
border-collapse: collapse;
border-spacing: 0;
}
.faculty-items li {
height : 100px;
}
.faculty-items li:nth-child(odd) {
background-color : grey;
}
.faculty-items li:nth-child(even) {
background-color : aqua
}
.faculty-items {
overflow : hidden;
position : relative;
right : 0;
display : flex;
-webkit-transition: transform 0.3s linear;
}
.faculty-carousel .controls {
display : block;
}<!doctype html>
<html>
<head>
<title>Carousel</title>
<link rel="stylesheet" href="style.css" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/hammer.js/2.0.8/hammer.min.js"></script>
</head>
<body>
<div class="faculty-carousel">
<ul class="faculty-items">
<li>Item 1</li>
<li>Item 2</li>
<li>Item 3</li>
<li>Item 4</li>
<li>Item 5</li>
<li>Item 6</li>
</ul>
<div class="controls">
<div class="prev">
prev
</div>
<div class="next">
next
</div>
</div>
</div>
<div class="faculty-carousel">
<ul class="faculty-items">
<li>Item 1</li>
<li>Item 2</li>
<li>Item 3</li>
<li>Item 4</li>
<li>Item 5</li>
<li>Item 6</li>
</ul>
<div class="controls">
<div class="prev">
prev
</div>
<div class="next">
next
</div>
</div>
</div>
<div class="faculty-carousel">
<ul class="faculty-items">
<li>Item 1</li>
<li>Item 2</li>
<li>Item 3</li>
<li>Item 4</li>
<li>Item 5</li>
<li>Item 6</li>
</ul>
<div class="controls">
<div class="prev">
prev
</div>
<div class="next">
next
</div>
</div>
</div>
</body>
</html>【问题讨论】：
-
为什么不直接使用已经存在的，而不是再次发明轮子呢？你的滑块看起来很光滑：kenwheeler.github.io/slick
-
@Red 这个练习的目的是让我可以学习如何构建 UI 组件，如滑块和轮播，而不是使用第三方资源。
标签： javascript jquery css hammer.js