jQuery -Bootstrap3 手机导航栏设置

在css样式部分，#sidebar-wrapper 中的left: 220px; width: 0; 和 margin-left: -220px; 搭配使用，促成sidebar-wrapper盒子的位置向左发生改变，通过鼠标点击button添加 .toggled 类使用宽度width: 220px; 恢复原来位置；

$(document).ready(function() {
    //前期条件获取
    var trigger = $('.hamburger'),
        overlay = $('.overlay'),
        isClosed = false;
    trigger.click(function() {
        hamburger_cross();
    });

    //执行函数
    function hamburger_cross() {
        if (isClosed == true) {
            overlay.hide();
            trigger.removeClass('is-open');
            trigger.addClass('is-closed');
            isClosed = false;
        } else {
            overlay.show();
            trigger.removeClass('is-closed');
            trigger.addClass('is-open');
            isClosed = true;
        }
    };

    /*
        HTML5 自定义的 data 属性 data-toggle 用于打开模态窗口，
        指以什么事件触发，常用的如modal,popover,tooltips等。

        [data-toggle="offcanvas"]：
        data-target="..." 是指在页面上加载的模态框的目标。可以在页面上创建多个模态框，然后
        为每个模态框创建不同的触发器。
        配合button中 data-toggle="offcanvas" 使用，这段代码
        的意思就是指将offcanvas这个Dom元素的内容以模态框的形式展示
    */
    $('[data-toggle="offcanvas"]').click(function() {
        $('#wrapper').toggleClass('toggled');
    });
});

@import "https://maxcdn.bootstrapcdn.com/font-awesome/4.4.0/css/font-awesome.min.css";
/*-------------------------------*/
/*          手机导航栏           */
/*-------------------------------*/
.g-navapp-box {
    display: none;
}

.nav .open > a {
  background-color: transparent;
}
.nav .open > a:hover {
  background-color: transparent;
}
.nav .open > a:focus {
  background-color: transparent;
}
/*-------------------------------*/
/*           Wrappers            */
/*-------------------------------*/
#wrapper {
  -moz-transition: all 0.2s ease-in-out;
  -o-transition: all 0.2s ease-in-out;
  -webkit-transition: all 0.2s ease-in-out;
  padding-left: 0;
  transition: all 0.2s ease-in-out;
}
#wrapper.toggled {
  padding-left: 220px;
}
#wrapper.toggled #sidebar-wrapper {
  width: 220px;
}
#wrapper.toggled #page-content-wrapper {
  margin-right: -220px;
  position: absolute;
}
#sidebar-wrapper {
  -moz-transition: all 0.2s ease-in-out;
  -o-transition: all 0.2s ease-in-out;
  -webkit-transition: all 0.2s ease-in-out;
  background: #1a1a1a;
  height: 100%;
  left: 220px;
  margin-left: -220px;
  overflow-x: hidden;
  overflow-y: auto;
  transition: all 0.2s ease-in-out;
  width: 0;
  z-index: 1000;
}
#sidebar-wrapper::-webkit-scrollbar {
  display: none;
}
#page-content-wrapper {
  padding-top: 70px;
  width: 100%;
}
/*-------------------------------*/
/*     Sidebar nav styles        */
/*-------------------------------*/
.sidebar-nav {
  list-style: none;
  margin: 0;
  padding: 0;
  position: absolute;
  top: 0;
  width: 220px;
}
.sidebar-nav li {
  display: inline-block;
  line-height: 20px;
  position: relative;
  width: 100%;
}
.sidebar-nav li:before {
  background-color: #1c1c1c;
  content: '';
  height: 100%;
  left: 0;
  position: absolute;
  top: 0;
  -webkit-transition: width 0.2s ease-in-out;
  transition: width 0.2s ease-in-out;
  width: 3px;
  z-index: -1;
}
.sidebar-nav li:first-child a {
  background-color: #1a1a1a;
  color: #ffffff;
}
.sidebar-nav li:nth-child(2):before {
  background-color: #402d5c;
}
.sidebar-nav li:nth-child(3):before {
  background-color: #4c366d;
}
.sidebar-nav li:nth-child(4):before {
  background-color: #583e7e;
}
.sidebar-nav li:nth-child(5):before {
  background-color: #64468f;
}
.sidebar-nav li:nth-child(6):before {
  background-color: #704fa0;
}
.sidebar-nav li:nth-child(7):before {
  background-color: #7c5aae;
}
.sidebar-nav li:nth-child(8):before {
  background-color: #8a6cb6;
}
.sidebar-nav li:nth-child(9):before {
  background-color: #987dbf;
}
.sidebar-nav li:hover:before {
  -webkit-transition: width 0.2s ease-in-out;
  transition: width 0.2s ease-in-out;
  width: 100%;
}
.sidebar-nav li a {
  color: #dddddd;
  display: block;
  padding: 10px 15px 10px 30px;
  text-decoration: none;
}
.sidebar-nav li.open:hover before {
  -webkit-transition: width 0.2s ease-in-out;
  transition: width 0.2s ease-in-out;
  width: 100%;
}
.sidebar-nav .dropdown-menu {
  background-color: #222222;
  border-radius: 0;
  border: none;
  box-shadow: none;
  margin: 0;
  padding: 0;
  position: relative;
  width: 100%;
}
.sidebar-nav li a:hover,
.sidebar-nav li a:active,
.sidebar-nav li a:focus,
.sidebar-nav li.open a:hover,
.sidebar-nav li.open a:active,
.sidebar-nav li.open a:focus {
  background-color: transparent;
  color: #ffffff;
  text-decoration: none;
}
.sidebar-nav > .sidebar-brand {
  font-size: 20px;
  height: 65px;
  line-height: 44px;
}

/* button按钮 */
.hamburger {
  background: transparent;
  border: none;
  display: block;
  height: 32px;
  margin-left: 15px;
  position: fixed;
  top: 20px;
  width: 32px;
  z-index: 999;
}
.hamburger:hover, .hamburger:focus, .hamburger:active {
  outline: none;
}
.hamburger.is-closed:before {
  -webkit-transform: translate3d(0, 0, 0);
  -webkit-transition: all 0.35s ease-in-out;
  color: #ffffff;
  content: '';
  display: block;
  font-size: 14px;
  line-height: 32px;
  opacity: 0;
  text-align: center;
  width: 100px;
}
.hamburger.is-closed:hover before {
  -webkit-transform: translate3d(-100px, 0, 0);
  -webkit-transition: all 0.2s ease-in-out;
  display: block;
  opacity: 1;
}
.hamburger.is-closed:hover .hamb-top {
  -webkit-transition: all 0.2s ease-in-out;
  top: 5px;
}
.hamburger.is-closed:hover .hamb-bottom {
  -webkit-transition: all 0.2s ease-in-out;
  bottom: 5px;
}
.hamburger.is-closed .hamb-top {
  -webkit-transition: all 0.2s ease-in-out;
  top: 5px;
}
.hamburger.is-closed .hamb-middle {
  margin-top: -2px;
  top: 50%;
}
.hamburger.is-closed .hamb-bottom {
  -webkit-transition: all 0.2s ease-in-out;
  bottom: 5px;
}
.hamburger.is-closed .hamb-top,
.hamburger.is-closed .hamb-middle,
.hamburger.is-closed .hamb-bottom,
.hamburger.is-open .hamb-top,
.hamburger.is-open .hamb-middle,
.hamburger.is-open .hamb-bottom {
  height: 4px;
  left: 0;
  position: absolute;
  width: 100%;
  border-radius: 2px;
  background-color: blue;
}
/* Button的三个横线 */
.hamburger.is-open .hamb-top {
  -webkit-transform: rotate(45deg);
  -webkit-transition: -webkit-transform 0.2s cubic-bezier(0.73, 1, 0.28, 0.08);
  margin-top: -2px;
  top: 50%;
}
.hamburger.is-open .hamb-middle {
  display: none;
}
.hamburger.is-open .hamb-bottom {
  -webkit-transform: rotate(-45deg);
  -webkit-transition: -webkit-transform 0.2s cubic-bezier(0.73, 1, 0.28, 0.08);
  margin-top: -2px;
  top: 50%;
}
.hamburger.is-open:before {
  -webkit-transform: translate3d(0, 0, 0);
  -webkit-transition: all 0.2s ease-in-out;
  color: #ffffff;
  content: '';
  display: block;
  font-size: 14px;
  line-height: 32px;
  opacity: 0;
  text-align: center;
  width: 100px;
}
.hamburger.is-open:hover before {
  -webkit-transform: translate3d(-100px, 0, 0);
  -webkit-transition: all 0.2s ease-in-out;
  display: block;
  opacity: 1;
}
/*-------------------------------*/
/*       ---    END   ---        */
/*-------------------------------*/


@media only screen and (max-width: 480px) {
    .g-navapp-box {
        display: block;
    }
}

    
    <section class="g-navapp-box">
        <div id="wrapper">
            <div class="overlay">div>
            <nav class="navbar navbar-inverse navbar-fixed-top" id="sidebar-wrapper" role="navigation">
                <ul class="nav sidebar-nav">
                    <li class="sidebar-brand">
                        <a href="#">
                           Bootstrap 3
                        a>
                    li>
                    <li>
                        <a href="#"><i class="fa fa-fw fa-home">i> Homea>
                    li>
                    <li>
                        <a href="#"><i class="fa fa-fw fa-folder">i> Page onea>
                    li>
                    <li>
                        <a href="#"><i class="fa fa-fw fa-file-o">i> Second pagea>
                    li>
                    <li>
                        <a href="#"><i class="fa fa-fw fa-cog">i> Third pagea>
                    li>
                    <li class="dropdown">
                      <a href="#" class="dropdown-toggle" data-toggle="dropdown"><i class="fa fa-fw fa-plus">i> Dropdown <span class="caret">span>a>
                      <ul class="dropdown-menu" role="menu">
                        <li class="dropdown-header">Dropdown headingli>
                        <li><a href="#">Actiona>li>
                        <li><a href="#">Another actiona>li>
                        <li><a href="#">Something else herea>li>
                        <li><a href="#">Separated linka>li>
                        <li><a href="#">One more separated linka>li>
                      ul>
                    li>
                    <li>
                        <a href="#"><i class="fa fa-fw fa-bank">i> Page foura>
                    li>
                    <li>
                        <a href="#"><i class="fa fa-fw fa-dropbox">i> Page 5a>
                    li>
                    <li>
                        <a href="#"><i class="fa fa-fw fa-twitter">i> Last pagea>
                    li>
                ul>
            nav>
            <div id="page-content-wrapper">
                <button type="button" class="hamburger is-closed animated fadeInLeft" data-toggle="offcanvas">
                    <span class="hamb-top">span>
                    <span class="hamb-middle">span>
                    <span class="hamb-bottom">span>
                button>
            div>
        div>
    section>