Question

当我向下滚动网站显示时，顶部的黑色菜单栏看起来像浮动条。但我认为这涉及到jquery。我尝试过CSS，但似乎不像我想要的那样为我工作

#menucontainer {
    position:fixed;
    top:0;
    height: 250px
}

#firstElement {
    margin-top: 250px
}

以下是我希望菜单的基本概念：

http://avathemes.com/WP/Hexic/

Answer 1

将您的菜单包含在带有ID或类的div或部分中。

#yourID.fixed {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1;
    width: 100%;
    border-bottom: 5px solid #ffffff;
}

//STICKY NAV
$(document).ready(function () {  
  var top = $('#yourID').offset().top - parseFloat($('#yourID').css('marginTop').replace(/auto/, 100));
  $(window).scroll(function (event) {
    // what the y position of the scroll is
    var y = $(this).scrollTop();

    // whether that's below the form
    if (y >= top) {
      // if so, ad the fixed class
      $('#yourID').addClass('fixed');
    } else {
      // otherwise remove it
      $('#yourID').removeClass('fixed');
    }
  });
});

不记得我从哪里得到这个，所以对我没有任何敬意，但它对我有用。

Answer 2

我认为使用Twitter Bootstrap可以帮助您。

查看Navbar in bootstrap并搜索“固定到顶部”

编辑：如果你想要发布像你这样的东西，可以使用这样的东西Leave menu bar fixed on top when scrolled。

当菜单顶部偏移等于添加类“.navbar-fixed-top”。

Answer 3

试试这个

CSS

* {margin: 0; padding: 0; outline: 0;}


body {
    font-family: Helvetica, Arial, Verdana, sans-serif;
    color: #999;
    font-size: 12px;
    background:#bfbfbf;


}


h1, h2 {
    font-family: 'Open Sans', sans-serif;
    font-weight: 300;
    margin:0 0 15px 0;
}


h1 {
    font-size: 36px;
    letter-spacing: -2px;
    line-height: 100%;
}

h1.title {
    font-size: 46px;
    font-weight: 700;
    color: #6a6a6a;


}


h2 {
    font-size: 24px;
}

p {
    margin: 0 0 15px 0;
}

.menuBtn {

    background: center center no-repeat transparent;
    background: #000;
    display: block;
    width: 40px;
    height: 40px;
    position: absolute;
    top: 0;
    left: 10px;

}

.clear {
    clear: both;
}
.wrap {
        /*background:url(../images/bg.png) top left repeat-x;*/
        width: 100%;
        max-width: 1140px;
        min-width: 960px;
        z-index: 10;
        position: relative;
        margin: 0 auto;
        padding: 0;

}



.section {
    width: 100%;
    max-width: 1140px;
    min-width: 960px;
    z-index: 10;
    position: relative;
    margin: 0 auto;
    padding: 0 0 20px 0;
}


.inner {
    width: 960px;
    margin: 0 auto;
    position: relative;
    min-height: 50px;
    padding:30px 0;
    font-size: 18px;
    font-family: 'Open Sans', sans-serif;
    font-weight: 300;
    padding:30px 0;
}


/* This is the selector i used for my menu, it needs to be set as position:absolute; */
.subMenu {
    position: absolute;
    top: 462px;
    height: 50px;
    z-index: 1000;
    width: 100%;
    max-width: 1140px;
    min-width: 960px;
    background: #aabd46;

}

.subMenu .inner {
    padding:0;
    font-weight: 400;
}





.subNavBtn {
    display: block;
    height: 35px;
    width: 12%;
    float: left;
    margin: 0px 0px 0 0;
    text-decoration: none;
    font-size: 14px;
    padding: 15px 2% 0 2%;
    text-align: center;
    color: #fff;
}

.end {
    margin: 0;
}


/* SECTIONS */
.sTop {
    min-height: 630px;
    background:#e5e5e5;
    color:#3d3d3d;

}



.s1 {
    min-height: 500px;
    background: #2e2e2e;
}


.s2 {
    min-height: 500px;
    background: #3f3f3f;
}


.s3 {
    min-height: 500px;
    background: #504f4f;
}


.s4 {
    min-height: 500px;
    background: #6e87a1;
    color: white;
}

.s5 {
    min-height: 500px;
    background: #293b4d;
    color: white;
}

的JavaScript

  (function(){


        $.fn.smint = function( options ) {

            // adding a class to users div
            $(this).addClass('smint')

            var settings = $.extend({
                'scrollSpeed '  : 500
                }, options);


            return $('.smint a').each( function() {


                if ( settings.scrollSpeed ) {

                    var scrollSpeed = settings.scrollSpeed

                }


                ///////////////////////////////////

                // get initial top offset for the menu 
                var stickyTop = $('.smint').offset().top;   

                // check position and make sticky if needed
                var stickyMenu = function(){

                    // current distance top
                    var scrollTop = $(window).scrollTop(); 

                    // if we scroll more than the navigation, change its position to fixed and add class 'fxd', otherwise change it back to absolute and remove the class
                    if (scrollTop > stickyTop) { 
                        $('.smint').css({ 'position': 'fixed', 'top':0 }).addClass('fxd');

                        } else {
                            $('.smint').css({ 'position': 'absolute', 'top':stickyTop }).removeClass('fxd'); 
                        }   
                };

                // run function
                stickyMenu();

                // run function every time you scroll
                $(window).scroll(function() {
                     stickyMenu();
                });

                ///////////////////////////////////////


                $(this).on('click', function(e){


                    // gets the height of the users div. This is used for off-setting the scroll so th emenu doesnt overlap any content in the div they jst scrolled to
                    var selectorHeight = $('.smint').height();   

                    // stops empty hrefs making the page jump when clicked
                    e.preventDefault();

                    // get id pf the button you just clicked
                    var id = $(this).attr('id');

                    // gets the distance from top of the div class that matches your button id minus the height of the nav menu. This means the nav wont initially overlap the content.
                    var goTo =  $('div.'+ id).offset().top -selectorHeight;

                    // Scroll the page to the desired position!
                    $("html, body").animate({ scrollTop: goTo }, scrollSpeed);

                }); 



            });

        }

    })();

HTML

<!DOCTYPE html>
<html>
<head>
<title>SMINT Demo</title>

<meta name = "keywords" content = "" />
<meta name = "description" content = "" />
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1, minimum-scale=1 user-scalable=no">

<link href='http://fonts.googleapis.com/css?family=Open+Sans:300,400,700' rel='stylesheet' type='text/css'>

<link href="css/demo.css" rel="stylesheet" type="text/css">

<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>

<script type="text/javascript"  src="js/jquery.smint.js"></script>

<script type="text/javascript">

$(document).ready( function() {
    $('.subMenu').smint({
        'scrollSpeed' : 1000
    });
});

</script>

</head>

<body>

    <div class="wrap">

      <div class="subMenu" >
        <div class="inner">
            <a href="#" id="sTop" class="subNavBtn">Home</a> 
            <a href="#" id="s1" class="subNavBtn">About me </a>
            <a href="#" id="s2" class="subNavBtn"> Portfolio</a>
            <a href="#" id="s3" class="subNavBtn">Working</a>
            <a href="#" id="s4" class="subNavBtn">Hello</a>
            <a href="#" id="s5" class="subNavBtn end">lets go</a>
        </div>



    </div>


    <div class="section sTop">



        <div class="inner">
            <h1>Welcome to my site </h1>
            <p>Click the links below !</p>

        </div>
        <br class="clear">
    </div>





    <div class="section s1">

        <div class="inner">

            <h1>About me </h1>

        </div>

    </div>

    <div class="section s2">
        <div class="inner">

            <h1>Portfolio</h1>

        </div>

    </div>

    <div class="section s3">
        <div class="inner">

        <h1>Working Standards</h1>

        </div>

    </div>

    <div class="section s4">
        <div class="inner">

            <h1>Hello</h1>

        </div>

    </div>

    <div class="section s5">
        <div class="inner">

        <h1>Lets Go</h1>

        </div>

    </div>



</div>
</body>
</html>

Answer 4

我为@Kortschot提供的解决方案多次尝试过，最后结果证明这个解决方案不适合我的情况。

使用@Kortschot提供的解决方案时，我遇到了问题：

当浮动条状态在修复或不修复之间发生变化时，浮动条的宽度无法维持
我希望所有流程都可以在一个脚本中完成，而提供的解决方案@Kortschot不适合。

这是我的解决方案，只需一个脚本即可完成所有工作（使用1.7+ jquery）：

<script>
//浮动条设置(set the floating bar)
$( function(){
    //add new .fixed style to the <head>
    var css = '#floating_bar.fixed{position:fixed;top:1px;z-index:9999;}',
        head = document.head || document.getElementsByTagName('head')[0],
        style = document.createElement('style');
    style.type = 'text/css';
    if (style.styleSheet){ style.styleSheet.cssText = css; } 
    else { style.appendChild(document.createTextNode(css)); }
    head.appendChild(style);

    var menuOffset = $("#floating_bar")[0].offsetTop;
    var menuWidth = document.getElementById("floating_bar").offsetWidth;
    $(document).on("scroll", function(){
        var docScroll = $(document).scrollTop();
        if(docScroll >= menuOffset) { 
            $("#floating_bar").addClass("fixed");
            //dynamically change the width of floating bar according to it's width of previous state 
            $("#floating_bar.fixed").width(menuWidth);
        }else {
            $("#floating_bar").removeClass("fixed");
        }
    });
});
</script>

Answer 5

在您提供的网址中，当您向下滚动页面的几行时，我会在浏览器顶部看到一个菜单栏。

所以我将你的问题分成两个问题：首先，如何制作一个固定的顶级菜单，滚动页面时不会消失。其次，如何在向下滚动几行后将菜单固定在顶部。

对于第一个问题，我更改了您的css代码。

#menucontainer {
    float:top;
    position:fixed;
    top:0;
    height: 100px;
    width: 100%;
    background-color: eeee00; /* makes other content won't be seen when the page scrolling */
}

我认为第二个问题需要写js。好吧，我还不知道。

向下滚动时如何构建浮动菜单栏

5 个答案:

CSS

的JavaScript

HTML