<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>今日頭條APP頂部點擊可居中導航</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no"/>
<link rel="stylesheet" href="https://cdn.bootcss.com/Swiper/4.0.6/css/swiper.min.css">
<script src="https://cdn.bootcss.com/jquery/3.2.1/jquery.min.js"></script>
<script src="resources/js/swiper.min.js"></script>
<style>
* {
margin: 0;
padding: 0;
}
#topNav {
width: 100%;
overflow: hidden;
font: 18px hiragino sans gb, microsoft yahei, simsun;
}
#topNav .swiper-slide {
padding: 0 1.1rem;
letter-spacing:2px;
width:3rem;
text-align:center;
}
#topNav .swiper-slide span{
transition:all .3s ease;
display:block;
}
#topNav .active span{
transform:scale(1.1);
color:#FF2D2D;
border-bottom: 3px solid #FF2D2D;
}
</style>
</head>
<body>
<div id="topNav" class="swiper-container">
<div class="swiper-wrapper">
<div class="swiper-slide active"><span>推薦</span></div>
<div class="swiper-slide"><span>熱點</span></div>
<div class="swiper-slide"><span>深圳</span></div>
<div class="swiper-slide"><span>視頻</span></div>
<div class="swiper-slide"><span>社會</span></div>
<div class="swiper-slide"><span>娛樂</span></div>
<div class="swiper-slide"><span>科技</span></div>
<div class="swiper-slide"><span>問答</span></div>
<div class="swiper-slide"><span>汽車</span></div>
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<div class="swiper-slide"><span>健康</span></div>
<div class="swiper-slide"><span>特產</span></div>
<div class="swiper-slide"><span>房產</span></div>
</div>
</div>
<img src="images/img02.png">
<script type="text/javascript">
var mySwiper = new Swiper('#topNav', {
freeMode: true,
freeModeMomentumRatio: 0.5,
slidesPerView: 'auto',
});
swiperWidth = mySwiper.container[0].clientWidth
maxTranslate = mySwiper.maxTranslate();
maxWidth = -maxTranslate + swiperWidth / 2
$(".swiper-container").on('touchstart', function(e) {
e.preventDefault()
})
//
mySwiper.on('tap', function(swiper, e) {
// e.preventDefault()
slide = swiper.slides[swiper.clickedIndex]
slideLeft = slide.offsetLeft
slideWidth = slide.clientWidth
slideCenter = slideLeft + slideWidth / 2
// 被點擊slide的中心點
mySwiper.setWrapperTransition(300)
if (slideCenter < swiperWidth / 2) {
mySwiper.setWrapperTranslate(0)
} else if (slideCenter > maxWidth) {
mySwiper.setWrapperTranslate(maxTranslate)
} else {
nowTlanslate = slideCenter - swiperWidth / 2
mySwiper.setWrapperTranslate(-nowTlanslate)
}
$("#topNav .active").removeClass('active')
$("#topNav .swiper-slide").eq(swiper.clickedIndex).addClass('active')
})
</script>
</body>
</html>
