如何调整不带百分比的flex项目？

Question

我正在尝试创建一个基于flexbox的网格,内容为2/3宽度,侧边栏为剩余的1/3.

我已经在每个col中使用了百分比作为宽度,遗憾的是,它在导航和标题中给出了错误.

为什么是这样？如何在不使用百分比的情况下实现此目的,以避免错误？

CodePen演示

@import url(https://fonts.googleapis.com/css?family=Open+Sans:400,300,600,700);
*,
*:before,
*:after {
  box-sizing: border-box;
}

html body {
  margin: 0;
  padding: 0;
  font-family: 'Open Sans', sans-serif;
}

h1,
h2,
h3,
h4,
h5,
p,
a,
li,
ul {
  margin: 0;
  padding: 0;
}


/* centres content of website in a width of 950px */

.container {
  width: 80%;
  margin: 0 auto;
}


/* Header styling */

header {
  background: #66b3ff;
  /*   padding: 10px; */
}


/* Logo */

#logo h1 {
  font-weight: 300;
  margin-top: 30px;
}

#logo h1 span {
  font-weight: 600;
}


/* end of Logo */


/* Nav */

nav ul {
  margin: 0;
  padding: 0;
  display: flex;
  margin-top: 50px;
}

li {
  flex: 1;
  list-style: none;
}

a {
  text-decoration: none;
}


/* End of header styling */


/* Columns */

.col1,
.col2,
.col3,
.col4,
.col5,
.col6,
.col7,
.col8,
.col9,
.col10,
.col11,
.col12 {
  margin: 0 5px 0 5px;
}

.row {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
}

.col1 {
  width: 8%;
}

.col2 {
  width: 16%;
}

.col3 {
  width: 25%;
}

.col4 {
  width: 33%;
}

.col5 {
  width: 41%;
}

.col6 {
  width: 50%;
}

.col7 {
  width: 58%;
}

.col8 {
  width: 66%;
}

.col9 {
  width: 75%;
}

.col10 {
  width: 83%;
}

.col11 {
  width: 91%;
}

.col12 {
  width: 100%;
}

<header>
  <div class="container">
    <div class="row">
      <!--    row    -->

      <!--    header    -->
      <div id="logo" class="col col6">
        <h1>Bespoke<span>Design</span>Agency</h1>
      </div>
      <nav class="col col6">
        <ul>
          <!--    Navigation    -->
          <li><a href="">HOME</a>
          </li>
          <li><a href="">ABOUT</a>
          </li>
          <li><a href="">GALLERY</a>
          </li>
          <li><a href="">CONTACT</a>
          </li>
        </ul>
      </nav>
      <!--   end of Navigation    -->
    </div>

  </div>
  <!--  End of container  -->
</header>
<!--    end of header    -->
<!--    end of row    -->

<div class="container mainContentContainer">

  <!--   Website CONTENT   -->
  <div class="row">
    <!--    row    -->
    <!--    Main content    -->
    <div class="col col8" id="maincontent">
      <h1>Main Website content here</h1>
      <p>Authentic truffaut put a bird on it tacos crucifix. Kale chips craft beer austin, organic small batch salvia squid. Readymade health goth put a bird on it, yr semiotics shabby chic williamsburg selfies man braid godard. DIY blog lomo selvage. Pabst
        echo park tacos, kinfolk chicharrones thundercats farm-to-table offal twee keffiyeh affogato irony helvetica banjo. Bicycle rights XOXO irony mumblecore tofu, keffiyeh kitsch retro plaid seitan street art. Chartreuse ennui helvetica 90's you probably
        haven't heard of them godard, DIY keffiyeh listicle 3 wolf moon mustache.</p>
    </div>
    <!--    end of main content    -->
    <!--    sidebar content    -->
    <div id="sidebar" class="col col4">
      <h1>side bar here</h1>
    </div>
    <!--    end of sidebar    -->
  </div>
  <!--    end of row   -->

  <div class="row">
    <footer class="col col12">
      <h1>footer content</h1>
    </footer>
  </div>


</div>

Answer 1

请考虑使用该flex-grow属性来调整弹性项目的大小.此属性告诉flex项目它们应该吸收的容器中有多少可用空间.

以下是如何flex-grow在一行中分配空间的一些示例:

.container:nth-child(1) > .box { flex-grow: 1;  background-color: lightgreen; }
.container:nth-child(1) > .box:last-child { background-color: lightpink; }
.container:nth-child(2) > .box:nth-child(1) { flex-grow: 3; background-color: aqua; }
.container:nth-child(2) > .box:nth-child(2) { flex-grow: 7; background-color: orange; }
.container:nth-child(2) > .box:nth-child(3) { flex-grow: 1;  background-color: orangered;}
.container:nth-child(3) > .box:nth-child(1) { flex-grow: 10; background-color: yellow; }
.container:nth-child(3) > .box:nth-child(2) { flex-grow: 5; background-color: lightgreen; }
.container:nth-child(3) > .box:nth-child(3) { flex-grow: 1; background-color: tan; }
.container:nth-child(4) > .box:nth-child(1) { flex-grow: 5; bacground-color: pink; }
.container:nth-child(4) > .box:nth-child(2) { flex-grow: 10; background-color: aqua; }
.container:nth-child(4) > .box:nth-child(3) { flex-grow: 25; background-color: tan; }
.container:nth-child(4) > .box:nth-child(4) { flex-grow: 50; background-color: tomato; }
.container:nth-child(4) > .box:nth-child(5) { flex-grow: 99; background-color: yellow; }


body {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.container {
    display: flex;
    width: 95%;
    padding: 5px;
    border: 1px solid #ccc;
    background-color: lightyellow;
}

.box {
    height: 50px;
    background-color: lightgreen;
    border: 1px solid #aaa;
    display: flex;
    justify-content: center;
    align-items: center;
}

<div class="container">
    <div class="box"><span>flex-grow: 1</span></div>
    <div class="box"><span>flex-grow: 1</span></div>
</div>

<div class="container">
    <div class="box"><span>flex-grow: 3</span></div>
    <div class="box"><span>flex-grow: 7</span></div>
    <div class="box"><span>flex-grow: 1</span></div>
</div>

<div class="container">
    <div class="box"><span>flex-grow: 10</span></div>
    <div class="box"><span>flex-grow: 5</span></div>
    <div class="box"><span>flex-grow: 1</span></div>
</div>

<div class="container">
    <div class="box"><span>flex-grow: 5</span></div>
    <div class="box"><span>flex-grow: 10</span></div>
    <div class="box"><span>flex-grow: 25</span></div>
    <div class="box"><span>flex-grow: 50</span></div>
    <div class="box"><span>flex-grow: 99</span></div>
</div>

jsFiddle演示

请注意,flexbox规范建议将其flex-grow用作flex速记属性的一部分.

7.2灵活性的组成部分

鼓励作者使用flex 速记来控制灵活性,而不是直接使用其纵向属性,因为速记正确地重置任何未指定的组件以适应 常见用途.

有关flex-grow工作原理的详细说明,请参阅此帖子:

• flex-grow不按预期调整flex项目的大小

使用flex属性时,请参阅规范以获取常用值的摘要.

• 7.1.1.共同的价值观flex