我创建了一个可折叠的导航栏,该栏很好用,
每次向下滚动导航栏显示和每次向上滚动导航栏隐藏
我希望通过显示navbar hide bottom
对用户可见,可以隐藏navbar。
show/hide button
应该使用navbar进行滚动,并且每次navar隐藏该按钮时用户都可以看到它!
有什么办法吗?
// Hide Header on on scroll down
var didScroll;
var lastScrollTop = 0;
var delta = 5;
var navbarHeight = $('header').outerHeight();
$(window).scroll(function(event) {
didScroll = true;
});
setInterval(function() {
if (didScroll) {
hasScrolled();
didScroll = false;
}
}, 250);
function hasScrolled() {
var st = $(this).scrollTop();
// Make sure they scroll more than delta
if (Math.abs(lastScrollTop - st) <= delta)
return;
// If they scrolled down and are past the navbar, add class .nav-up.
// This is necessary so you never see what is "behind" the navbar.
if (st > lastScrollTop && st > navbarHeight) {
// Scroll Down
$('header').removeClass('nav-up').addClass('nav-down');
} else {
// Scroll Up
if (st + $(window).height() < $(document).height()) {
$('header').removeClass('nav-down').addClass('nav-up');
}
}
lastScrollTop = st;
}
body {
padding-top: 40px;
}
header {
background: #f5b335;
height: 40px;
position: fixed;
bottom: 0;
transition: bottom 0.2s ease-in-out;
width: 100%;
}
.nav-up {
bottom: -40px;
}
main {
background: url() repeat;
height: 2000px;
}
footer {
background: #ddd;
}
* {
color: transparent
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<header class="nav-down">
This is your menu.
</header>
<main>
This is your body.
</main>
<footer>
This is your footer.
</footer>
有人知道写这个的好方法吗? 谢谢您的帮助.....................................
答案 0 :(得分:0)
您可以这样做。我删除了CSS color: transparent
,供您查看。您只需要将navbar
的显示none
设置为''
;
// Hide Header on on scroll down
var didScroll;
var lastScrollTop = 0;
var delta = 5;
var navbarHeight = $('header').outerHeight();
$(window).scroll(function(event) {
didScroll = true;
});
setInterval(function() {
if (didScroll) {
hasScrolled();
didScroll = false;
}
}, 250);
function hasScrolled() {
var st = $(this).scrollTop();
// Make sure they scroll more than delta
if (Math.abs(lastScrollTop - st) <= delta)
return;
// If they scrolled down and are past the navbar, add class .nav-up.
// This is necessary so you never see what is "behind" the navbar.
if (st > lastScrollTop && st > navbarHeight) {
// Scroll Down
$('header').removeClass('nav-up');
$('div').removeClass('nav-up');
} else {
// Scroll Up
if (st + $(window).height() < $(document).height()) {
$('header').addClass('nav-up');
$('div').addClass('nav-up');
}
}
lastScrollTop = st;
}
$("div").click(function(){
$('header').slideToggle('fast', function() {
$("div").css("bottom", $("div").css("bottom") === '30px' ? '10px' : '30px');
});
});
body {
padding-top: 40px;
}
header {
background: #f5b335;
height: 40px;
position: fixed;
bottom: 0;
transition: bottom 0.2s ease-in-out;
width: 100%;
}
.nav-up {
bottom: -40px !important;
}
main {
height: 2000px;
}
footer {
background: #ddd;
}
div {
position: fixed;
bottom:30px;
right: 5px;
background:#f5b335;
border: 2px solid #f5b335;
border-radius: 5px;
outline: 0;
transition: bottom 0.2s ease-in-out;
cursor: pointer;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<header class="nav-down">
This is your menu.
</header>
<div> Show Navbar </div>
<main>
This is your body.
</main>
<footer>
This is your footer.
</footer>
答案 1 :(得分:0)
检查此解决方案。
已编辑
// Hide Header on on scroll down
var didScroll;
var lastScrollTop = 0;
var delta = 5;
var navbarHeight = $('header').outerHeight();
$(window).scroll(function(event) {
didScroll = true;
});
setInterval(function() {
if (didScroll) {
hasScrolled();
didScroll = false;
}
}, 250);
function hasScrolled() {
var st = $(this).scrollTop();
// Make sure they scroll more than delta
if (Math.abs(lastScrollTop - st) <= delta)
return;
// If they scrolled down and are past the navbar, add class .nav-up.
// This is necessary so you never see what is "behind" the navbar.
if (st > lastScrollTop && st > navbarHeight) {
// Scroll Down
if ($('header a').hasClass('Down-Arrow')){
$('header').removeClass('nav-up').addClass('nav-down');
} else {
$('.UP-Arrow').addClass('hide-arrow');
}
} else {
// Scroll Up
if (st + $(window).height() < $(document).height()) {
$('.UP-Arrow').removeClass('hide-arrow');
$('header').removeClass('nav-down').addClass('nav-up');
}
}
lastScrollTop = st;
}
$(document).on('click','.Down-Arrow',function(){
$(this).removeClass('Down-Arrow').addClass('UP-Arrow');
$('header').removeClass('nav-down').addClass('nav-up');
});
$(document).on('click','.UP-Arrow',function(){
$(this).removeClass('UP-Arrow').addClass('Down-Arrow');
$('header').removeClass('nav-up').addClass('nav-down');
});
body {
padding-top: 40px;
}
header {
background: #f5b335;
height: 40px;
position: fixed;
bottom: 0;
transition: bottom 0.2s ease-in-out;
width: 100%;
}
header a{
color:#000;
position:absolute;
width:30px;
height:30px;
padding:5px;
background:#f5b335;
bottom:40px;
right:20px;
border-radius: 2px 2px 0 0;
text-align:center;
transition-duration:0.3s;
cursor:pointer;
}
.Down-Arrow:after{
content: "˅";
position:absolute;
top:15px;
left:15px;
}
.UP-Arrow:after{
content: "˄";
position:absolute;
top:15px;
left:15px;
}
header.nav-up .Down-Arrow{
bottom:0px;
}
.hide-arrow{
bottom: -40px;
}
.nav-up {
bottom: -40px;
}
main {
background: url() repeat;
height: 2000px;
}
footer {
background: #ddd;
}
* {
color: transparent
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<header class="nav-down">
This is your menu.
<a class="Down-Arrow"></a>
</header>
<main>
This is your body.
</main>
<footer>
This is your footer.
</footer>