移动端布局之flex布局2

flex布局父项常见属性
- flex-flow属性
flex布局子项常见属性
- flex属性（重要）
- align-self控制子项自己在侧轴上的排列方式
- order属性定义项目的排列顺序
案例：携程网首页案例制作(曾经的版本)
- 技术选型
- 搭建相关文件夹结构
- 设置视口标签以及引入初始化样式
- 常用初始化样式
- - index.css
- 搜索模块布局
- 常见flex布局思路
- - index.html
  - index.css
- nav外观布局
- - index.html
  - index.css
- nav内容制作
- - index.html
  - index.css

flex布局父项常见属性

flex-flow属性

flex-flow属性是flex-direction和flex-wrap属性的复合属性

flex-flow:row wrap;

flex-direction：设置主轴方向
justify-content：设置主轴上的子元素排列方式
flex-wrap：设置子元素是否换行
align-items：设置侧轴上的子元素排列方式（单行）
align-content：设置侧轴上的子元素排列方式（多行）
flex-flow：复合属性，相当于同时设置了flex-direction和flex-wrap

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        div{
            width: 600px;
            height: 400px;
            background-color: pink;
            display: flex;
            /*flex-direction: column;
            flex-wrap: wrap;*/
            flex-flow:column wrap;
        }
        div span{
            width: 150px;
            height: 100px;
            background-color: skyblue;
        }
    </style>
</head>
<body>
<div>
    <span>1</span>
    <span>2</span>
    <span>3</span>
    <span>4</span>
    <span>5</span>
    <span>6</span>
</div>
</body>
</html>

在这里插入图片描述

flex布局子项常见属性

flex子项占的份数
align-self控制子项自己在侧轴的排列方式
order属性定义子项的排列顺序（前后顺序）

flex属性（重要）

flex属性定义子项目分配剩余空间，用flex来表示占多少份数

.item {
flex:<number>; /* default 0*/
}

京东商城移动端首页的搜索框部分另外写法：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        div{
            margin: 0 auto;
            width: 60%;
            height: 100px;
            background-color: pink;
            display: flex;
        }
        div span:nth-child(1){
            width: 100px;
            height: 100px;
            background-color: skyblue;
        }
        div span:nth-child(2){
            flex: 1;
            background-color: mediumpurple;
        }
        div span:nth-child(3){
            width: 100px;
            height: 100px;
            background-color: greenyellow;
        }
    </style>
</head>
<body>
<div>
    <span>1</span>
    <span>2</span>
    <span>3</span>
</div>
</body>
</html>

而且盒子可以随着页面宽度变化而变化
请添加图片描述
直接分成三份，其中一个占两份，剩下两个占各占两份：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        div{
            margin: 0 auto;
            width: 60%;
            height: 100px;
            background-color: pink;
            display: flex;
        }
        div span:nth-child(1){
            width: 100px;
            height: 100px;
            background-color: skyblue;
        }
        div span:nth-child(2){
            flex: 1;
            background-color: mediumpurple;
        }
        div span:nth-child(3){
            width: 100px;
            height: 100px;
            background-color: greenyellow;
        }
        p{
            width: 60%;
            height: 200px;
            margin: 20px auto;
            background-color: skyblue;
            display: flex;
        }
        p span{
            flex: 1;
        }
        p span:nth-child(2){
            flex: 2;
            background-color: mediumpurple;
        }
    </style>
</head>
<body>
<div>
    <span>1</span>
    <span>2</span>
    <span>3</span>
</div>
<p>
    <span>1</span>
    <span>2</span>
    <span>3</span>
</p>
</body>
</html>

在这里插入图片描述

align-self控制子项自己在侧轴上的排列方式

align-self属性允许单个项目有与其他项目不一样的对齐方式，可覆盖align-items属性，默认值为auto，表示继承父元素的align-items属性，如果没有父元素，则等同于stretch

span:nth-child(2) {
/* 设置自己在侧轴上的排列方式*/
align-self:flex-end;
}

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        div{
            width: 800px;
            height: 400px;
            background-color: pink;
            display: flex;
            /*让三个子盒子沿着侧轴底侧对齐*/
            /*align-items: flex-end;*/
        }
        div span{
            margin-right:20px;
            width: 150px;
            height: 100px;
            background-color: skyblue;
        }
        div span:nth-child(3){
            /*我们想只让第三个盒子下来底侧*/
            align-self: flex-end;
        }
    </style>
</head>
<body>
<div>
    <span>1</span>
    <span>2</span>
    <span>3</span>
</div>
</body>
</html>

在这里插入图片描述

order属性定义项目的排列顺序

数值越小，排列越靠前，默认为0
注意：和z-index不一样

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        div{
            width: 800px;
            height: 400px;
            background-color: pink;
            display: flex;
            /*让三个子盒子沿着侧轴底侧对齐*/
            /*align-items: flex-end;*/
        }
        div span{
            margin-right:20px;
            width: 150px;
            height: 100px;
            background-color: skyblue;
        }
        div span:nth-child(3){
            /*我们想只让第三个盒子下来底侧*/
            align-self: flex-end;
        }
        p{
            width: 800px;
            height: 400px;
            background-color: mediumpurple;
            display: flex;
        }
        p span{
            margin-right: 10px;
            width: 150px;
            height: 100px;
            background-color: palegoldenrod;
        }
        p span:nth-child(2){
            /*默认是0 -1比0小，所以在前面*/
            order: -1;
        }
    </style>
</head>
<body>
<div>
    <span>1</span>
    <span>2</span>
    <span>3</span>
</div>
<p>
    <span>1</span>
    <span>2</span>
    <span>3</span>
</p>
</body>
</html>

在这里插入图片描述

案例：携程网首页案例制作(曾经的版本)

技术选型

方案：我们采取单独制作移动页面方案
技术：布局采取flex布局

搭建相关文件夹结构

在这里插入图片描述

设置视口标签以及引入初始化样式

<meta name="viewport" content="width=device-width,user-scalable=no,
    initial-scale=1.0,maximum-scale=1.0,minimum-scale=1.0">
    <link rel="stylesheet" href="css/normalize.css">
    <link rel="stylesheet" href="css/index.css">

常用初始化样式

index.css

body{
    max-width: 540px;
    min-width: 320px;
    margin: 0 auto;
    background-color: #f2f2f2;
    font: normal 16px/1.5 PingFangSC-regular,Tahoma,Lucida Grande,Verdana,Microsoft Yahei,STXihei,hei;
    color: #000;
    overflow-x: hidden;
    -webkit-tap-highlight-color: transparent;
}

搜索模块布局

<body>
    <div class="search-index"></div>
</body>

/*搜索模块*/
.search-index{
    /*固定定位跟父级没有关系，它以屏幕为主*/
    position: fixed;
    top: 0;
    /*居中对齐*/
    left: 50%;
    transform: translateX(-50%);
    /*固定的盒子应该有宽度*/
    width: 100%;
    max-width: 540px;
    min-width: 320px;
    height: 44px;
    background-color: pink;
}

在这里插入图片描述

常见flex布局思路

在这里插入图片描述

index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>携程在手，收走就走</title>
    <meta name="viewport" content="width=device-width,user-scalable=no,
    initial-scale=1.0,maximum-scale=1.0,minimum-scale=1.0">
    <link rel="stylesheet" href="css/normalize.css">
    <link rel="stylesheet" href="css/index.css">
</head>
<body>
    <!--顶部搜索-->
    <div class="search-index">
        <div class="search">观音桥步行街门票·酒店·美食</div>
        <a href="#" class="user">旅游地图</a>
    </div>
    <!--焦点图模块-->
    <div class="focus">
        <img src="./upload/focus.jpg" alt="">
    </div>
    <!--局部导航栏-->
    <ul class="local-nav">
        <li>
            <a href="#" title="景点·玩乐">
                <span class="local-nav-icon"></span>
                <span>景点·玩乐</span>
            </a>
        </li>
        <li>
            <a href="#" title="周边游">
                <span class="local-nav-icon"></span>
                <span>周边游</span>
            </a>
        </li>
        <li>
            <a href="#" title="美食林">
                <span class="local-nav-icon"></span>
                <span>美食林</span>
            </a>
        </li>
        <li>
            <a href="#" title="一日游">
                <span class="local-nav-icon"></span>
                <span>一日游</span>
            </a>
        </li>
        <li>
            <a href="#" title="当地攻略">
                <span class="local-nav-icon"></span>
                <span>当地攻略</span>
            </a>
        </li>
    </ul>
</body>
</html>

index.css

body{
    max-width: 540px;
    min-width: 320px;
    margin: 0 auto;
    background-color: #f2f2f2;
    font: normal 16px/1.5 PingFangSC-regular,Tahoma,Lucida Grande,Verdana,Microsoft Yahei,STXihei,hei;
    color: #000;
    overflow-x: hidden;
    -webkit-tap-highlight-color: transparent;
    font-size: 14px;
}
ul{
    list-style: none;
    /*ul有默认的padding和margin值*/
    padding: 0;
    margin: 0;
}
a{
    text-decoration: none;
    color: #222;
}
div{
    box-sizing: border-box;
}
/*搜索模块*/
.search-index{
    /*固定定位跟父级没有关系，它以屏幕为主*/
    position: fixed;
    top: 0;
    /*居中对齐*/
    left: 50%;
    transform: translateX(-50%);
    /*固定的盒子应该有宽度*/
    width: 100%;
    max-width: 540px;
    min-width: 320px;
    height: 44px;
    background: linear-gradient(to right,#2fa2ff,#2285fa);
    display: flex;
}
.search{
    flex: 1;
    height: 26px;
    background-color: #fff;
    margin: 7px 10px;
    border-radius: 15px;
    position: relative;
    font-size: 12px;
    line-height: 26px;
    padding-left: 10px;
    color: #666;
}
.search::after{
    position: absolute;
    top: 1px;
    right: 1px;
    content: "搜索";
    width: 45px;
    height: 24px;
    font-size: 12px;
    border-radius: 15px;
    background: linear-gradient(to right,#33c6fc,#3fabff);
    text-align: center;
    line-height: 24px;
    color: #fff;
}
.user{
    width: 50px;
    height: 44px;
    font-size: 12px;
    color: #fff;
    text-align: center;
    /*background-color: mediumpurple;*/
}
.user::before{
    content: "";
    display: block;
    width: 24px;
    height: 24px;
    background: url(../images/map.png) no-repeat;
    background-size: 24px;
    margin: 0 auto;
}
/*focus*/
.focus{
    margin: 50px 10px 0;
}
.focus img{
    width: 100%;
    border-radius: 10px;
}
/*局部导航栏*/
.local-nav{
    height: 64px;
    margin: 3px 4px;
    background-color: #fff;
    border-radius: 8px;
    display: flex;
}
.local-nav li{
    flex: 1;
}
.local-nav a{
    display: flex;
    flex-direction: column;
    /*侧轴居中对齐，因为是单行*/
    align-items: center;
}
.local-nav-icon{
    margin-top: 8px;
    width: 32px;
    height: 32px;
}
ul li:nth-child(1) .local-nav-icon{
    background: url(../images/localnav_bg.png) no-repeat;
    background-size: 32px auto;
}
ul li:nth-child(2) .local-nav-icon{
    background: url(../images/localnav_bg.png) no-repeat 0 -32px;
    background-size: 32px auto;
}
ul li:nth-child(3) .local-nav-icon{
    margin-top: 8px;
    width: 32px;
    height: 32px;
    background: url(../images/localnav_bg.png) no-repeat 0 -64px;
    background-size: 32px auto;
}
ul li:nth-child(4) .local-nav-icon{
    margin-top: 8px;
    width: 32px;
    height: 32px;
    background: url(../images/localnav_bg.png) no-repeat 0 -96px;
    background-size: 32px auto;
}
ul li:nth-child(5) .local-nav-icon{
    margin-top: 8px;
    width: 32px;
    height: 32px;
    background: url(../images/localnav_bg.png) no-repeat 0 -128px;
    background-size: 32px auto;
}

在这里插入图片描述

nav外观布局

index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>携程在手，收走就走</title>
    <meta name="viewport" content="width=device-width,user-scalable=no,
    initial-scale=1.0,maximum-scale=1.0,minimum-scale=1.0">
    <link rel="stylesheet" href="css/normalize.css">
    <link rel="stylesheet" href="css/index.css">
</head>
<body>
    <!--顶部搜索-->
    <div class="search-index">
        <div class="search">观音桥步行街门票·酒店·美食</div>
        <a href="#" class="user">旅游地图</a>
    </div>
    <!--焦点图模块-->
    <div class="focus">
        <img src="./upload/focus.jpg" alt="">
    </div>
    <!--局部导航栏-->
    <ul class="local-nav">
        <li>
            <a href="#" title="景点·玩乐">
                <span class="local-nav-icon-icon1"></span>
                <span>景点·玩乐</span>
            </a>
        </li>
        <li>
            <a href="#" title="周边游">
                <span class="local-nav-icon-icon2"></span>
                <span>周边游</span>
            </a>
        </li>
        <li>
            <a href="#" title="美食林">
                <span class="local-nav-icon-icon3"></span>
                <span>美食林</span>
            </a>
        </li>
        <li>
            <a href="#" title="一日游">
                <span class="local-nav-icon-icon4"></span>
                <span>一日游</span>
            </a>
        </li>
        <li>
            <a href="#" title="当地攻略">
                <span class="local-nav-icon-icon5"></span>
                <span>当地攻略</span>
            </a>
        </li>
    </ul>
    <!--主导航栏-->
    <nav>
        <div class="nav-common">
            <div class="nav-items">1</div>
            <div class="nav-items">1</div>
            <div class="nav-items">1</div>
        </div>
        <div class="nav-common">2</div>
        <div class="nav-common">3</div>
    </nav>
</body>
</html>

index.css

body{
    max-width: 540px;
    min-width: 320px;
    margin: 0 auto;
    background-color: #f2f2f2;
    font: normal 16px/1.5 PingFangSC-regular,Tahoma,Lucida Grande,Verdana,Microsoft Yahei,STXihei,hei;
    color: #000;
    overflow-x: hidden;
    -webkit-tap-highlight-color: transparent;
    font-size: 14px;
}
ul{
    list-style: none;
    /*ul有默认的padding和margin值*/
    padding: 0;
    margin: 0;
}
a{
    text-decoration: none;
    color: #222;
}
div{
    box-sizing: border-box;
}
/*搜索模块*/
.search-index{
    /*固定定位跟父级没有关系，它以屏幕为主*/
    position: fixed;
    top: 0;
    /*居中对齐*/
    left: 50%;
    transform: translateX(-50%);
    /*固定的盒子应该有宽度*/
    width: 100%;
    max-width: 540px;
    min-width: 320px;
    height: 44px;
    background: linear-gradient(to right,#2fa2ff,#2285fa);
    display: flex;
}
.search{
    flex: 1;
    height: 26px;
    background-color: #fff;
    margin: 7px 10px;
    border-radius: 15px;
    position: relative;
    font-size: 12px;
    line-height: 26px;
    padding-left: 10px;
    color: #666;
}
.search::after{
    position: absolute;
    top: 1px;
    right: 1px;
    content: "搜索";
    width: 45px;
    height: 24px;
    font-size: 12px;
    border-radius: 15px;
    background: linear-gradient(to right,#33c6fc,#3fabff);
    text-align: center;
    line-height: 24px;
    color: #fff;
}
.user{
    width: 50px;
    height: 44px;
    font-size: 12px;
    color: #fff;
    text-align: center;
    /*background-color: mediumpurple;*/
}
.user::before{
    content: "";
    display: block;
    width: 24px;
    height: 24px;
    background: url(../images/map.png) no-repeat;
    background-size: 24px;
    margin: 0 auto;
}
/*focus*/
.focus{
    margin: 50px 10px 0;
}
.focus img{
    width: 100%;
    border-radius: 10px;
}
/*局部导航栏*/
.local-nav{
    height: 64px;
    margin: 3px 4px;
    background-color: #fff;
    border-radius: 8px;
    display: flex;
}
.local-nav li{
    flex: 1;
}
.local-nav a{
    display: flex;
    flex-direction: column;
    /*侧轴居中对齐，因为是单行*/
    align-items: center;
}
/*使用属性选择器对各个图片进行替换*/
.local-nav li [class^="local-nav-icon"]{
    margin-top: 8px;
    width: 32px;
    height: 32px;
    background: url(../images/localnav_bg.png) no-repeat 0 0;
    background-size: 32px auto;
}
.local-nav li .local-nav-icon-icon2{
    background-position: 0 -32px;
}
.local-nav li .local-nav-icon-icon3{
    background-position: 0 -64px;
}
.local-nav li .local-nav-icon-icon4{
    background-position: 0 -96px;
}
.local-nav li .local-nav-icon-icon5{
    background-position: 0 -128px;
}
/*nav*/
nav{
    overflow:hidden;
    border-radius: 8px;
    margin: 0 4px 3px;
}
.nav-common{
    height: 88px;
    background-color: pink;
    display: flex;
}
.nav-common:nth-child(2){
    margin: 3px 0;
}
.nav-items{
    flex: 1;
}
/*-n+2就是选择前两个，n+2是从第二个开始*/
.nav-items:nth-child(-n+2){
    border-right: 1px solid #fff;
}

在这里插入图片描述

nav内容制作

index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>携程在手，收走就走</title>
    <meta name="viewport" content="width=device-width,user-scalable=no,
    initial-scale=1.0,maximum-scale=1.0,minimum-scale=1.0">
    <link rel="stylesheet" href="css/normalize.css">
    <link rel="stylesheet" href="css/index.css">
</head>
<body>
    <!--顶部搜索-->
    <div class="search-index">
        <div class="search">观音桥步行街门票·酒店·美食</div>
        <a href="#" class="user">旅游地图</a>
    </div>
    <!--焦点图模块-->
    <div class="focus">
        <img src="./upload/focus.jpg" alt="">
    </div>
    <!--局部导航栏-->
    <ul class="local-nav">
        <li>
            <a href="#" title="景点·玩乐">
                <span class="local-nav-icon-icon1"></span>
                <span>景点·玩乐</span>
            </a>
        </li>
        <li>
            <a href="#" title="周边游">
                <span class="local-nav-icon-icon2"></span>
                <span>周边游</span>
            </a>
        </li>
        <li>
            <a href="#" title="美食林">
                <span class="local-nav-icon-icon3"></span>
                <span>美食林</span>
            </a>
        </li>
        <li>
            <a href="#" title="一日游">
                <span class="local-nav-icon-icon4"></span>
                <span>一日游</span>
            </a>
        </li>
        <li>
            <a href="#" title="当地攻略">
                <span class="local-nav-icon-icon5"></span>
                <span>当地攻略</span>
            </a>
        </li>
    </ul>
    <!--主导航栏-->
    <nav>
        <div class="nav-common">
            <div class="nav-items">
                <a href="#">海外酒店</a>
            </div>
            <div class="nav-items">
                <a href="#">海外酒店</a>
                <a href="#">特价酒店</a>
            </div>
            <div class="nav-items">
                <a href="#">团购</a>
                <a href="#">民宿·客栈</a>
            </div>
        </div>
        <div class="nav-common">
            <div class="nav-items">
                <a href="#">机票</a>
            </div>
            <div class="nav-items">
                <a href="#">火车票</a>
                <a href="#">特价机票</a>
            </div>
            <div class="nav-items">
                <a href="#">汽车票·船票</a>
                <a href="#">专车·租车</a>
            </div>
        </div>
        <div class="nav-common">
            <div class="nav-items">
                <a href="#">旅游</a>
            </div>
            <div class="nav-items">
                <a href="#">门票</a>
                <a href="#">目的地攻略</a>
            </div>
            <div class="nav-items">
                <a href="#">邮轮旅行</a>
                <a href="#">定制旅行</a>
            </div>
        </div>
    </nav>
</body>
</html>

index.css

body{
    max-width: 540px;
    min-width: 320px;
    margin: 0 auto;
    background-color: #f2f2f2;
    font: normal 16px/1.5 PingFangSC-regular,Tahoma,Lucida Grande,Verdana,Microsoft Yahei,STXihei,hei;
    color: #000;
    overflow-x: hidden;
    -webkit-tap-highlight-color: transparent;
    font-size: 14px;
}
ul{
    list-style: none;
    /*ul有默认的padding和margin值*/
    padding: 0;
    margin: 0;
}
a{
    text-decoration: none;
    color: #222;
}
div{
    box-sizing: border-box;
}
/*搜索模块*/
.search-index{
    /*固定定位跟父级没有关系，它以屏幕为主*/
    position: fixed;
    top: 0;
    /*居中对齐*/
    left: 50%;
    transform: translateX(-50%);
    /*固定的盒子应该有宽度*/
    width: 100%;
    max-width: 540px;
    min-width: 320px;
    height: 44px;
    background: linear-gradient(to right,#2fa2ff,#2285fa);
    display: flex;
}
.search{
    flex: 1;
    height: 26px;
    background-color: #fff;
    margin: 7px 10px;
    border-radius: 15px;
    position: relative;
    font-size: 12px;
    line-height: 26px;
    padding-left: 10px;
    color: #666;
}
.search::after{
    position: absolute;
    top: 1px;
    right: 1px;
    content: "搜索";
    width: 45px;
    height: 24px;
    font-size: 12px;
    border-radius: 15px;
    background: linear-gradient(to right,#33c6fc,#3fabff);
    text-align: center;
    line-height: 24px;
    color: #fff;
}
.user{
    width: 50px;
    height: 44px;
    font-size: 12px;
    color: #fff;
    text-align: center;
    /*background-color: mediumpurple;*/
}
.user::before{
    content: "";
    display: block;
    width: 24px;
    height: 24px;
    background: url(../images/map.png) no-repeat;
    background-size: 24px;
    margin: 0 auto;
}
/*focus*/
.focus{
    margin: 50px 10px 0;
}
.focus img{
    width: 100%;
    border-radius: 10px;
}
/*局部导航栏*/
.local-nav{
    height: 64px;
    margin: 3px 4px;
    background-color: #fff;
    border-radius: 8px;
    display: flex;
}
.local-nav li{
    flex: 1;
}
.local-nav a{
    display: flex;
    flex-direction: column;
    /*侧轴居中对齐，因为是单行*/
    align-items: center;
}
/*使用属性选择器对各个图片进行替换*/
.local-nav li [class^="local-nav-icon"]{
    margin-top: 8px;
    width: 32px;
    height: 32px;
    background: url(../images/localnav_bg.png) no-repeat 0 0;
    background-size: 32px auto;
}
.local-nav li .local-nav-icon-icon2{
    background-position: 0 -32px;
}
.local-nav li .local-nav-icon-icon3{
    background-position: 0 -64px;
}
.local-nav li .local-nav-icon-icon4{
    background-position: 0 -96px;
}
.local-nav li .local-nav-icon-icon5{
    background-position: 0 -128px;
}
/*nav*/
nav{
    overflow:hidden;
    border-radius: 8px;
    margin: 0 4px 3px;
}
.nav-common{
    height: 88px;
    background-color: pink;
    display: flex;
}
.nav-common:nth-child(2){
    margin: 3px 0;
}
.nav-items{
    /*子也可以当父成为flex容器*/
    flex: 1;
    display: flex;
    flex-direction: column;
}
/*-n+2就是选择前两个，n+2是从第二个开始*/
.nav-items:nth-child(-n+2){
    border-right: 1px solid #fff;
}
.nav-items a{
    flex: 1;
    line-height: 44px;
    text-align: center;
    color: #ffff;
    /*文字阴影*/
    text-shadow: 1px 1px rgba(0,0,0,0.2);
}
.nav-items a:nth-child(1){
    border-bottom: 1px solid #fff;
}
.nav-items:nth-child(1) a{
    border-bottom: 0;
    background: url(../images/hotel.png) no-repeat bottom center;
    background-size: 121px auto;
}