我在浏览器窗口的底部放置了一个导航栏，位于所有div元素的上方和外部。当用户滚动并且它到达顶部时，我试图让导航栏粘在窗口的顶部..
我尝试过以下操作但是我似乎无法让它发挥作用;还尝试了其他一些在线解决方案，但没有运气。有没有人有任何想法？
$(document).ready(function() {
// Cache selectors for faster performance.
var $window = $(window),
$mainNavBar = $('#navBar'),
$mainNavBarAnchor = $('#navBarAnchor');
// Run this on scroll events.
$window.scroll(function() {
var window_top = $window.scrollTop();
var div_top = $mainNavBarAnchor.offset().top;
if (window_top > div_top) {
// Make the div sticky.
$mainNavBar.addClass('stick');
$mainNavBarAnchor.height($mainNavBar.height());
}
else {
// Unstick the div.
$mainNavBar.removeClass('stick');
$mainNavBarAnchor.height(0);
}
});
});
nav { height: 75px; width: 100%; position: absolute; bottom: 0; margin 0; padding 0; float: none; background-color: none; border: 0px solid #000; z-index: 100; color: #fff;}
ol { margin: auto; width: auto; height: auto; text-align: center; background-color: none; margin-top: 20px;}
ol li { display: inline-block; font-family: 'dinregular'; font-size: 1.6em; width: auto; margin: auto; background-color: none; color: #fff }
ol li:nth-child(1) { margin-right: 25px; margin-left: 0; }
ol li:nth-child(2) { margin-right: 25px; margin-left: 0;}
ol li:nth-child(3) { margin-right: 25px; margin-left: 0; }
.stick {
position: fixed;
top: 0;
background-color: white;
} <script src="https://code.jquery.com/jquery-1.11.0.js"></script>
<div id="navBarAnchor"></div>
<nav id="navbar">
<ol>
<a href="#About"><li>About</li> </a>
<a href="#Services"><li>Services</li> </a>
<a href="#Work"><li>Work</li> </a>
<a href="#Contact"><li>Contact</li> </a>
</ol>
</nav>
答案 0 :(得分：1)
我认为你正在寻找这样的事情：
var header = $("#navbar");
$(window).scroll(function() {
var scroll = $(window).scrollTop();
if (scroll >= window.innerHeight) {
header.addClass("fixed");
} else {
header.removeClass("fixed");
}
});#navbar.fixed {
position: fixed;
top: 0;
}
nav {
height: 100px;
width: 100%;
position: absolute;
bottom: 0;
margin 0;
padding 0;
float: none;
background-color: white;
border: 0px solid #000;
z-index: 100;
color: #fff;
}
.container {
padding-bottom: 50px;
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<nav id="navbar">
<ol>
<a href="#About">
<li>About</li>
</a>
<a href="#Services">
<li>Services</li>
</a>
<a href="#Work">
<li>Work</li>
</a>
<a href="#Contact">
<li>Contact</li>
</a>
</ol>
</nav>
<div class="container">
What is Lorem Ipsum? Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type
specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently
with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum. Why do we use it? It is a long established fact that a reader will be distracted by the readable content of a page when looking at its layout. The point of using
Lorem Ipsum is that it has a more-or-less normal distribution of letters, as opposed to using 'Content here, content here', making it look like readable English. Many desktop publishing packages and web page editors now use Lorem Ipsum as their default
model text, and a search for 'lorem ipsum' will uncover many web sites still in their infancy. Various versions have evolved over the years, sometimes by accident, sometimes on purpose (injected humour and the like). Where does it come from? Contrary
to popular belief, Lorem Ipsum is not simply random text. It has roots in a piece of classical Latin literature from 45 BC, making it over 2000 years old. Richard McClintock, a Latin professor at Hampden-Sydney College in Virginia, looked up one of
the more obscure Latin words, consectetur, from a Lorem Ipsum passage, and going through the cites of the word in classical literature, discovered the undoubtable source. Lorem Ipsum comes from sections 1.10.32 and 1.10.33 of "de Finibus Bonorum et
Malorum" (The Extremes of Good and Evil) by Cicero, written in 45 BC. This book is a treatise on the theory of ethics, very popular during the Renaissance. The first line of Lorem Ipsum, "Lorem ipsum dolor sit amet..", comes from a line in section 1.10.32.
The standard chunk of Lorem Ipsum used since the 1500s is reproduced below for those interested. Sections 1.10.32 and 1.10.33 from "de Finibus Bonorum et Malorum" by Cicero are also reproduced in their exact original form, accompanied by English versions
from the 1914 translation by H. Rackham. What is Lorem Ipsum? Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley
of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing
Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum. Why do we use it? It is a long established fact that a reader will be distracted by the readable content of a page when
looking at its layout. The point of using Lorem Ipsum is that it has a more-or-less normal distribution of letters, as opposed to using 'Content here, content here', making it look like readable English. Many desktop publishing packages and web page
editors now use Lorem Ipsum as their default model text, and a search for 'lorem ipsum' will uncover many web sites still in their infancy. Various versions have evolved over the years, sometimes by accident, sometimes on purpose (injected humour and
the like). Where does it come from? Contrary to popular belief, Lorem Ipsum is not simply random text. It has roots in a piece of classical Latin literature from 45 BC, making it over 2000 years old. Richard McClintock, a Latin professor at Hampden-Sydney
College in Virginia, looked up one of the more obscure Latin words, consectetur, from a Lorem Ipsum passage, and going through the cites of the word in classical literature, discovered the undoubtable source. Lorem Ipsum comes from sections 1.10.32
and 1.10.33 of "de Finibus Bonorum et Malorum" (The Extremes of Good and Evil) by Cicero, written in 45 BC. This book is a treatise on the theory of ethics, very popular during the Renaissance. The first line of Lorem Ipsum, "Lorem ipsum dolor sit amet..",
comes from a line in section 1.10.32. The standard chunk of Lorem Ipsum used since the 1500s is reproduced below for those interested. Sections 1.10.32 and 1.10.33 from "de Finibus Bonorum et Malorum" by Cicero are also reproduced in their exact original
form, accompanied by English versions from the 1914 translation by H. Rackham. What is Lorem Ipsum? Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s,
when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with
the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum. Why do we use it? It is a long established fact that a reader will be distracted
by the readable content of a page when looking at its layout. The point of using Lorem Ipsum is that it has a more-or-less normal distribution of letters, as opposed to using 'Content here, content here', making it look like readable English. Many desktop
publishing packages and web page editors now use Lorem Ipsum as their default model text, and a search for 'lorem ipsum' will uncover many web sites still in their infancy. Various versions have evolved over the years, sometimes by accident, sometimes
on purpose (injected humour and the like). Where does it come from? Contrary to popular belief, Lorem Ipsum is not simply random text. It has roots in a piece of classical Latin literature from 45 BC, making it over 2000 years old. Richard McClintock,
a Latin professor at Hampden-Sydney College in Virginia, looked up one of the more obscure Latin words, consectetur, from a Lorem Ipsum passage, and going through the cites of the word in classical literature, discovered the undoubtable source. Lorem
Ipsum comes from sections 1.10.32 and 1.10.33 of "de Finibus Bonorum et Malorum" (The Extremes of Good and Evil) by Cicero, written in 45 BC. This book is a treatise on the theory of ethics, very popular during the Renaissance. The first line of Lorem
Ipsum, "Lorem ipsum dolor sit amet..", comes from a line in section 1.10.32. The standard chunk of Lorem Ipsum used since the 1500s is reproduced below for those interested. Sections 1.10.32 and 1.10.33 from "de Finibus Bonorum et Malorum" by Cicero
are also reproduced in their exact original form, accompanied by English versions from the 1914 translation by H. Rackham. What is Lorem Ipsum? Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's
standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged.
It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum. Why do we use it? It is a long established
fact that a reader will be distracted by the readable content of a page when looking at its layout. The point of using Lorem Ipsum is that it has a more-or-less normal distribution of letters, as opposed to using 'Content here, content here', making
it look like readable English. Many desktop publishing packages and web page editors now use Lorem Ipsum as their default model text, and a search for 'lorem ipsum' will uncover many web sites still in their infancy. Various versions have evolved over
the years, sometimes by accident, sometimes on purpose (injected humour and the like). Where does it come from? Contrary to popular belief, Lorem Ipsum is not simply random text. It has roots in a piece of classical Latin literature from 45 BC, making
it over 2000 years old. Richard McClintock, a Latin professor at Hampden-Sydney College in Virginia, looked up one of the more obscure Latin words, consectetur, from a Lorem Ipsum passage, and going through the cites of the word in classical literature,
discovered the undoubtable source. Lorem Ipsum comes from sections 1.10.32 and 1.10.33 of "de Finibus Bonorum et Malorum" (The Extremes of Good and Evil) by Cicero, written in 45 BC. This book is a treatise on the theory of ethics, very popular during
the Renaissance. The first line of Lorem Ipsum, "Lorem ipsum dolor sit amet..", comes from a line in section 1.10.32. The standard chunk of Lorem Ipsum used since the 1500s is reproduced below for those interested. Sections 1.10.32 and 1.10.33 from
"de Finibus Bonorum et Malorum" by Cicero are also reproduced in their exact original form, accompanied by English versions from the 1914 translation by H. Rackham. What is Lorem Ipsum? Lorem Ipsum is simply dummy text of the printing and typesetting
industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic
typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.
Why do we use it? It is a long established fact that a reader will be distracted by the readable content of a page when looking at its layout. The point of using Lorem Ipsum is that it has a more-or-less normal distribution of letters, as opposed to
using 'Content here, content here', making it look like readable English. Many desktop publishing packages and web page editors now use Lorem Ipsum as their default model text, and a search for 'lorem ipsum' will uncover many web sites still in their
infancy. Various versions have evolved over the years, sometimes by accident, sometimes on purpose (injected humour and the like). Where does it come from? Contrary to popular belief, Lorem Ipsum is not simply random text. It has roots in a piece of
classical Latin literature from 45 BC, making it over 2000 years old. Richard McClintock, a Latin professor at Hampden-Sydney College in Virginia, looked up one of the more obscure Latin words, consectetur, from a Lorem Ipsum passage, and going through
the cites of the word in classical literature, discovered the undoubtable source. Lorem Ipsum comes from sections 1.10.32 and 1.10.33 of "de Finibus Bonorum et Malorum" (The Extremes of Good and Evil) by Cicero, written in 45 BC. This book is a treatise
on the theory of ethics, very popular during the Renaissance. The first line of Lorem Ipsum, "Lorem ipsum dolor sit amet..", comes from a line in section 1.10.32. The standard chunk of Lorem Ipsum used since the 1500s is reproduced below for those interested.
Sections 1.10.32 and 1.10.33 from "de Finibus Bonorum et Malorum" by Cicero are also reproduced in their exact original form, accompanied by English versions from the 1914 translation by H. Rackham. What is Lorem Ipsum? Lorem Ipsum is simply dummy text
of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries,
but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker
including versions of Lorem Ipsum. Why do we use it? It is a long established fact that a reader will be distracted by the readable content of a page when looking at its layout. The point of using Lorem Ipsum is that it has a more-or-less normal distribution
of letters, as opposed to using 'Content here, content here', making it look like readable English. Many desktop publishing packages and web page editors now use Lorem Ipsum as their default model text, and a search for 'lorem ipsum' will uncover many
web sites still in their infancy. Various versions have evolved over the years, sometimes by accident, sometimes on purpose (injected humour and the like). Where does it come from? Contrary to popular belief, Lorem Ipsum is not simply random text. It
has roots in a piece of classical Latin literature from 45 BC, making it over 2000 years old. Richard McClintock, a Latin professor at Hampden-Sydney College in Virginia, looked up one of the more obscure Latin words, consectetur, from a Lorem Ipsum
passage, and going through the cites of the word in classical literature, discovered the undoubtable source. Lorem Ipsum comes from sections 1.10.32 and 1.10.33 of "de Finibus Bonorum et Malorum" (The Extremes of Good and Evil) by Cicero, written in
45 BC. This book is a treatise on the theory of ethics, very popular during the Renaissance. The first line of Lorem Ipsum, "Lorem ipsum dolor sit amet..", comes from a line in section 1.10.32. The standard chunk of Lorem Ipsum used since the 1500s
is reproduced below for those interested. Sections 1.10.32 and 1.10.33 from "de Finibus Bonorum et Malorum" by Cicero are also reproduced in their exact original form, accompanied by English versions from the 1914 translation by H. Rackham.
</div>
答案 1 :(得分：0)
当add/remove为＆gt;时，position: fixed只能window.scrollTop上课nav然后偏移元素的顶部或在这种情况下var nav = $('nav'), w = $(window), sTop = nav.offset().top
w.resize(function() {
sTop = nav.offset().top
})
w.scroll(function() {
if(w.scrollTop() > sTop) {
nav.addClass('fixed')
} else {
nav.removeClass('fixed')
}
})。您还可以在调整大小时重新计算偏移顶部。
.content {
height: 100vh;
}
nav {
width: 100%;
}
ol {
display: flex;
justify-content: space-between;
padding: 0;
border: 1px solid black;
margin: 0;
}
body {
height: 2500px;
margin: 0;
}
.fixed {
position: fixed;
top: 0;
left: 0;
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="content"></div>
<nav id="navbar">
<ol>
<a href="#About"><li>About</li> </a>
<a href="#Services"><li>Services</li> </a>
<a href="#Work"><li>Work</li> </a>
<a href="#Contact"><li>Contact</li> </a>
</ol>
</nav>self.scrollView.frame=self.view.frame;
self.scrollView.contentSize=self.scrollView.frame.size;
[self.view addSubview:self.scrollView];
答案 2 :(得分：0)
您首先获得导航的位置，这样您就可以获得＆＃34;触发器＆＃34;职位this will be different on other screen resolutions。
然后你只需要监听窗口的滚动事件，然后添加/删除一个类来修复导航栏。
看看我的jsFiddle：https://jsfiddle.net/xopq0r2h/1/
HTML
<div class="content">
CONTENT 0
</div>
<div class="navigation">
<a>Link 1</a>
<a>Link 2</a>
<a>Link 3</a>
</div>
<div class="content">
CONTENT 1
</div>
<div class="content">
CONTENT 2
</div>
<div class="content">
CONTENT 3
</div>
Jquery的
$(function()
{
var navigationYPosition = $('.navigation').position().top;
$(window).scroll(function () {
var $navigation = $('.navigation');
if ($(window).scrollTop() > 400) {
$navigation.addClass('fixed-top');
}
if ($(window).scrollTop() < 401) {
$navigation.removeClass('fixed-top');
}
});
});
CSS
.navigation{
margin: 0;
width: 100%;
min-height: 32px;
background-color: #000;
padding: 5px;
}
.content{
height: 400px;
border: solid 1px #f0f;
}
.fixed-top{
position: fixed;
top: 0;
}
a{
margin-left: 3px;
background-color: #fff;
}