css - Flexbox 父元素折叠

标签 css flexbox

我试图让我的 Logo 和导航菜单底部对齐，并将它们分别左右分开(好像 Logo 向左浮动，导航项向右浮动)但我无法控制垂直方向它们之间的对齐方式，因为子元素在下方不断消失，要看到它，我必须将溢出设置为在其父元素上可见。

我一直在努力处理试图强制高度的父容器，但它们一直在折叠，我找不到让它们包裹子元素的解决方案。

这是在桌面 View 中发生的:请参阅样式末尾的@media(最小宽度:1460px)。

我能得到一些帮助吗？ 提前致谢。

/*------------------------- reset */
html {
    box-sizing: border-box;
    font-size: 16px;
}

*,
*:before,
*:after {
    box-sizing: inherit;
}

body,
h1,
h2,
h3,
h4,
h5,
h6,
p,
ol,
ul {
    margin: 0;
    padding: 0;
}

ol,
ul {
    list-style: none;
}

img {
    width: 100%;
    height: auto;
}


/*-------------------- general styles  */

:root {
    --light-bg: rgba(0, 0, 0, .1);
    --main-bg-color: rgba(220, 220, 220, 0.8);
    --main-font: 'Lato', sans-serif;
    --title-bg: #555;
    --title-color: #fff;
    --title-font: "Poppins", sans-serif;
    --secondary-title-color: #444;
    --main-text-color: #444;
    --shadows: 0px 1px 15px rgba(0, 0, 0, .6);
    --hr: 1px solid rgba(0, 0, 0, .2);
}

body {
    background-color: var(--main-bg-color);
    color: #A1A1A1;
    font-family: var(--title-font);
    font-weight: 100;
    font-size: 0.9rem;
    letter-spacing: 1px;
    line-height: 1.3;
}

.container {
    position: relative;
    width: 100%;
    margin: 0 auto;
}

a {
    outline: none;
    text-decoration: none;
    padding: 2px 1px 0;
}

a:link {
    color: #778899;
}

a:visited {
    color: #778899;
}

a:focus {
    background: rgba(0, 0, 0, .3);
}

a:hover {
    color: #9aa6b1;
}

a:active {
    color: #fff;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--title-font);
    color: var(--secondary-title-color);
    font-weight: 300;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 16px;
    margin: 0 auto;
    padding: 10px;
    text-align: center;
}

h1 {
    color: var(--title-color);
    background-color: var(--title-bg);
    font-weight: 900;
    font-size: 1.5rem;
}

h2 {
    font-size: 1.5rem;
}


h3 {
    font-size: 1rem;
    text-align: left;
    padding: 20px 0;
}

p::first-letter,
li::first-letter {
    text-transform: uppercase;
}

/*---------------------------- HEADER  */
header {
    display: block;
    height: 120px;
    background-color: #fff;
    box-shadow: var(--shadows);
    width: 100%;
    position: relative;
    z-index: 999999;
}

.flex-container {
    overflow: hidden;
}

.logo {
}

.logo img {
    width: 250px;
    height: 100px;
    margin: 10px;
}


/* menu */
nav {
    width: 100%;
    position: absolute;
    z-index: 1;
    top: 10px;
    right: 10px;
}

nav ul {
    margin: 0 -10px 0 0;
    padding: 0;
    list-style: none;
    overflow: hidden;
    background-color: rgba(255, 255, 255, 1);
    top: 57px;
    position: relative;
    clear: both;
    max-height: 0;
    transition: max-height .2s ease-out;
    color: white;
    font-size: 1.3rem;
}

nav li a {
    display: block;
    padding: 20px 38px;
    border-bottom: var(--hr);
    text-decoration: none;
    color: darkseagreen;
    font-size: 1.3rem;
}

nav li a:hover,
nav .menu-btn:hover {
    background-color: #f4f4f4;
}

nav li a:hover {
    color: seagreen;
    font-size: 1.3rem;
}

/* menu icon */


.menu-icon {
    cursor: pointer;
    display: inline-block;
    float: right;
    padding: 25px 17px;
    position: relative;
    user-select: none;
    border: 1px solid #999;
    background-color: #b2bdcc;
    border-radius: 50%;
}

.menu-icon .navicon {
    background: #fff;
    display: block;
    height: 2px;
    position: relative;
    transition: background .2s ease-out;
    width: 18px;
}

.menu-icon .navicon:before,
.menu-icon .navicon:after {
    background: #fff;
    content: '';
    display: block;
    height: 100%;
    position: absolute;
    transition: all .2s ease-out;
    width: 100%;
}

.menu-icon .navicon:before {
    top: 5px;
}

.menu-icon .navicon:after {
    top: -5px;
}

/* menu btn */

.menu-btn {
    display: none;
}

.menu-btn:checked ~ ul {
    max-height: 476px;
}

.menu-btn:checked ~ .menu-icon .navicon {
    background: transparent;
}

.menu-btn:checked ~ .menu-icon .navicon:before {
    transform: rotate(-45deg);
}

.menu-btn:checked ~ .menu-icon .navicon:after {
    transform: rotate(45deg);
}

.menu-btn:checked ~ .menu-icon:not(.steps) .navicon:before,
.menu-btn:checked ~ .menu-icon:not(.steps) .navicon:after {
    top: 0;
}

@media (min-width: 1460px) {

    .container {
        width: 80%;
    }

    .flex-container,
    nav ul {
        display: flex;
        flex-direction: row;
        flex-wrap: nowrap;
        justify-content: space-between;
    }
    .logo img{
        margin: 10px 0;
    }
    .logo {
        height: 120px;
    }

    /* menu */
    nav {
        display: flex;
        position: static;
        width: 70%;
    }
    
        nav ul {
     
        overflow: visible;
    }
    
    nav li{
        height: max-content;
    }

    nav li a {
        padding: 10px 20px;
        border-bottom: none;
        border-right: 1px solid #f4f4f4;
        margin: 0;
    }

    .menu-icon {
        display: none;
    }
}
<!DOCTYPE html>
<html lang="es">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title></title>
    <meta name="title" content="">
    <meta name="description" content="">
    <meta name="keywords" content="">
    <link href="css/responsive-menu.css" rel="stylesheet" type="text/css">
</head>

<body>

    <header>
        <div class="container">
            <div class="flex-container">
                <div class="logo">
                    <img src="https://dummyimage.com/250x100/b2bdcc/fff.png" />
                </div>
                <nav>
                    <input class="menu-btn" type="checkbox" id="menu-btn" />
                    <label class="menu-icon" for="menu-btn"><span class="navicon"></span></label>
                    <ul>
                        <li><a href="#">menu 1</a></li>
                        <li><a href="#">menu 2</a></li>
                        <li><a href="#">menu 3</a></li>
                        <li><a href="#">menu 4</a></li>
                        <li><a href="#">menu 5</a></li>
                        <li><a href="#">menu 6</a></li>
                        <li><a href="#">menu 7</a></li>
                    </ul>
                </nav>
            </div>
        </div>
    </header>
    <main>

    </main>
    <footer>

    </footer>
</body>

</html>

最佳答案

要在 min-width: 1460px 中分隔和底部对齐 Logo 和菜单，我只在您的媒体查询中进行了这些修改(它们都已注释):

@media (min-width: 1460px) {
        .container {
            width: 80%;
        }

        .flex-container,
        nav ul {
            display: flex;
            flex-direction: row;
            flex-wrap: nowrap;
            justify-content: space-between;
            max-height: none;  /*remove max-height:0 */
            top: 0; /* remove top:57px; */
            align-items: flex-end; /* This rule align your menu on bottom */
        }


        .logo img{
            margin: 10px 0;
        }
        .logo {
            height: 120px;
        }

        /* menu */
        nav {
            display: flex;
            position: static;
            /*width: 70%;*/
            width:auto;
            margin-left:auto; /* --> this rule put your nav on right */
        }

        /*nav ul {
            overflow: visible;  --> Removing max-height:0; this rule is not necessary 
        }*/

        nav li{
            height: max-content;
        }

        nav li a {
            padding: 10px 20px;
            border-bottom: none;
            border-right: 1px solid #f4f4f4;
            margin: 0;
        }

        .menu-icon {
            display: none;
        }
    }

这是结果。希望能帮助到你! :)

/*------------------------- reset */
html {
    box-sizing: border-box;
    font-size: 16px;
}

*,
*:before,
*:after {
    box-sizing: inherit;
}

body,
h1,
h2,
h3,
h4,
h5,
h6,
p,
ol,
ul {
    margin: 0;
    padding: 0;
}

ol,
ul {
    list-style: none;
}

img {
    width: 100%;
    height: auto;
}


/*-------------------- general styles  */

:root {
    --light-bg: rgba(0, 0, 0, .1);
    --main-bg-color: rgba(220, 220, 220, 0.8);
    --main-font: 'Lato', sans-serif;
    --title-bg: #555;
    --title-color: #fff;
    --title-font: "Poppins", sans-serif;
    --secondary-title-color: #444;
    --main-text-color: #444;
    --shadows: 0px 1px 15px rgba(0, 0, 0, .6);
    --hr: 1px solid rgba(0, 0, 0, .2);
}

body {
    background-color: var(--main-bg-color);
    color: #A1A1A1;
    font-family: var(--title-font);
    font-weight: 100;
    font-size: 0.9rem;
    letter-spacing: 1px;
    line-height: 1.3;
}

.container {
    position: relative;
    width: 100%;
    margin: 0 auto;
}

a {
    outline: none;
    text-decoration: none;
    padding: 2px 1px 0;
}

a:link {
    color: #778899;
}

a:visited {
    color: #778899;
}

a:focus {
    background: rgba(0, 0, 0, .3);
}

a:hover {
    color: #9aa6b1;
}

a:active {
    color: #fff;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--title-font);
    color: var(--secondary-title-color);
    font-weight: 300;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 16px;
    margin: 0 auto;
    padding: 10px;
    text-align: center;
}

h1 {
    color: var(--title-color);
    background-color: var(--title-bg);
    font-weight: 900;
    font-size: 1.5rem;
}

h2 {
    font-size: 1.5rem;
}


h3 {
    font-size: 1rem;
    text-align: left;
    padding: 20px 0;
}

p::first-letter,
li::first-letter {
    text-transform: uppercase;
}

/*---------------------------- HEADER  */
header {
    display: block;
    height: 120px;
    background-color: #fff;
    box-shadow: var(--shadows);
    width: 100%;
    position: relative;
    z-index: 999999;
}

.flex-container {
    overflow: hidden;
}

.logo {
}

.logo img {
    width: 250px;
    height: 100px;
    margin: 10px;
}


/* menu */
nav {
    width: 100%;
    position: absolute;
    z-index: 1;
    top: 10px;
    right: 10px;
}

nav ul {
    margin: 0 -10px 0 0;
    padding: 0;
    list-style: none;
    overflow: hidden;
    background-color: rgba(255, 255, 255, 1);
    top: 57px;
    position: relative;
    clear: both;
    max-height: 0;
    transition: max-height .2s ease-out;
    color: white;
    font-size: 1.3rem;
}

nav li a {
    display: block;
    padding: 20px 38px;
    border-bottom: var(--hr);
    text-decoration: none;
    color: darkseagreen;
    font-size: 1.3rem;
}

nav li a:hover,
nav .menu-btn:hover {
    background-color: #f4f4f4;
}

nav li a:hover {
    color: seagreen;
    font-size: 1.3rem;
}

/* menu icon */


.menu-icon {
    cursor: pointer;
    display: inline-block;
    float: right;
    padding: 25px 17px;
    position: relative;
    user-select: none;
    border: 1px solid #999;
    background-color: #b2bdcc;
    border-radius: 50%;
}

.menu-icon .navicon {
    background: #fff;
    display: block;
    height: 2px;
    position: relative;
    transition: background .2s ease-out;
    width: 18px;
}

.menu-icon .navicon:before,
.menu-icon .navicon:after {
    background: #fff;
    content: '';
    display: block;
    height: 100%;
    position: absolute;
    transition: all .2s ease-out;
    width: 100%;
}

.menu-icon .navicon:before {
    top: 5px;
}

.menu-icon .navicon:after {
    top: -5px;
}

/* menu btn */

.menu-btn {
    display: none;
}

.menu-btn:checked ~ ul {
    max-height: 476px;
}

.menu-btn:checked ~ .menu-icon .navicon {
    background: transparent;
}

.menu-btn:checked ~ .menu-icon .navicon:before {
    transform: rotate(-45deg);
}

.menu-btn:checked ~ .menu-icon .navicon:after {
    transform: rotate(45deg);
}

.menu-btn:checked ~ .menu-icon:not(.steps) .navicon:before,
.menu-btn:checked ~ .menu-icon:not(.steps) .navicon:after {
    top: 0;
}

@media (min-width: 1460px) {

    .container {
        width: 80%;
    }

    .flex-container,
    nav ul {
        display: flex;
        flex-direction: row;
        flex-wrap: nowrap;
        justify-content: space-between;
        max-height: none;  /*remove max-height:0 */
        top: 0; /* remove top:57px; */
        align-items: flex-end; /* This rule align your menu on bottom */
    }


    .logo img{
        margin: 10px 0;
    }
    .logo {
        height: 120px;
    }

    /* menu */
    nav {
        display: flex;
        position: static;
        /*width: 70%;*/
        width:auto;
        margin-left:auto; /* --> this rule put your nav on right */
    }

    /*nav ul {
        overflow: visible;  --> Removing max-height:0; this rule is not necessary 
    }*/

    nav li{
        height: max-content;
    }

    nav li a {
        padding: 10px 20px;
        border-bottom: none;
        border-right: 1px solid #f4f4f4;
        margin: 0;
    }

    .menu-icon {
        display: none;
    }
}
<header>
        <div class="container">
            <div class="flex-container">
                <div class="logo">
                    <img src="https://dummyimage.com/250x100/b2bdcc/fff.png" />
                </div>
                <nav>
                    <input class="menu-btn" type="checkbox" id="menu-btn" />
                    <label class="menu-icon" for="menu-btn"><span class="navicon"></span></label>
                    <ul>
                        <li><a href="#">menu 1</a></li>
                        <li><a href="#">menu 2</a></li>
                        <li><a href="#">menu 3</a></li>
                        <li><a href="#">menu 4</a></li>
                        <li><a href="#">menu 5</a></li>
                        <li><a href="#">menu 6</a></li>
                        <li><a href="#">menu 7</a></li>
                    </ul>
                </nav>
            </div>
        </div>
    </header>
    <main>

    </main>
    <footer>

    </footer>

关于css - Flexbox 父元素折叠，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/53204542/

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