CSS flex儿童排水沟的边缘

Question

我有一个画廊布局，我想用保证金分隔每个方框。问题是每行中的最后一个框与网格不对齐;右侧还有空间，如何在不使用填充的情况下执行此操作？ （这将迫使我添加另一个包装div）

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
ul {
  list-style-type: none;
}
.flex {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-flex-wrap: wrap;
  -ms-flex-wrap: wrap;
  flex-wrap: wrap;
}
.align-center {
  -webkit-box-align: center;
  -webkit-align-items: center;
  -ms-flex-align: center;
  align-items: center;
}
.space-between {
  -webkit-box-pack: justify;
  -webkit-justify-content: space-between;
  -ms-flex-pack: justify;
  justify-content: space-between;
}
.container {
  max-width: 1000px;
  margin: 0 auto;
  height: 100%;
  padding: 0 1em;
  border: 1px solid;
}
nav {
  background: #464646;
  height: 70px;
}
.box {
  background: lightblue;
  padding: 1em;
  -webkit-box-flex: 0;
  -webkit-flex: 0 0 calc(50% - 1em);
  -ms-flex: 0 0 calc(50% - 1em);
  flex: 0 0 calc(50% - 1em);
  text-align: center;
  margin-right: 1em;
  margin-bottom: 1em;
}

<nav>
  <div class="container flex align-center space-between">

    <ul>
      <li>Logo</li>
    </ul>

    <ul>
      <li>Home</li>
    </ul>

  </div>
</nav>

<div class="container">

  <header>
    <h1>Header</h1>
  </header>

</div>

<div class="container">

  <div class="gallery flex">
    <div class="box">BOX 1</div>
    <div class="box">BOX 2</div>
    <div class="box">BOX 3</div>
  </div>

</div>

注意：我不能使用flex grow：1因为我并不总是连续两个盒子。

我之间不能使用空格，因为网格是动态的，例如如果框的宽度是33.33％而你有五个框，第二行将有两个框，一个在左侧，第二个在右边。

Answer 1

方法＃01：

分别在parnet和child上添加以下css（此方法仅在连续只有2个框时才有效）：

/* For Parent Element */
.flex {
  justify-content: space-between;
}

/* For Child Element */
.flex-child {
  flex: 0 0 calc(50% - 0.5em);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
ul {
  list-style-type: none;
}
.flex {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-flex-wrap: wrap;
  -ms-flex-wrap: wrap;
  flex-wrap: wrap;
}
.align-center {
  -webkit-box-align: center;
  -webkit-align-items: center;
  -ms-flex-align: center;
  align-items: center;
}
.space-between {
  -webkit-box-pack: justify;
  -webkit-justify-content: space-between;
  -ms-flex-pack: justify;
  justify-content: space-between;
}
.container {
  max-width: 1000px;
  margin: 0 auto;
  height: 100%;
  padding: 0 1em;
  border: 1px solid;
}
nav {
  background: #464646;
  height: 70px;
}
.box {
  background: lightblue;
  padding: 1em;
  -webkit-box-flex: 0;
  -webkit-flex: 0 0 calc(50% - 0.5em);
  -ms-flex: 0 0 calc(50% - 0.5em);
  flex: 0 0 calc(50% - 0.5em);
  text-align: center;
  margin-bottom: 1em;
}

<nav>
  <div class="container flex align-center space-between">
    <ul>
      <li>Logo</li>
    </ul>
    <ul>
      <li>Home</li>
    </ul>
  </div>
</nav>
<div class="container">
  <header>
    <h1>Header</h1>
  </header>
</div>
<div class="container">
  <div class="gallery flex space-between">
    <div class="box">BOX 1</div>
    <div class="box">BOX 2</div>
    <div class="box">BOX 3</div>
    <div class="box">BOX 4</div>
    <div class="box">BOX 5</div>
    <div class="box">BOX 6</div>
    <div class="box">BOX 7</div>
    <div class="box">BOX 8</div>
    <div class="box">BOX 9</div>
  </div>
</div>

方法＃02：

1. 在子元素的两边添加边距。
2. 使用相同数量的负边距从左/右延伸父级。

注意 ：如果出现水平滚动，请在overflow: hidden的父级上添加.gallery。

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
ul {
  list-style-type: none;
}
.flex {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-flex-wrap: wrap;
  -ms-flex-wrap: wrap;
  flex-wrap: wrap;
  margin: 0 -0.5em;
}
.align-center {
  -webkit-box-align: center;
  -webkit-align-items: center;
  -ms-flex-align: center;
  align-items: center;
}
.space-between {
  -webkit-box-pack: justify;
  -webkit-justify-content: space-between;
  -ms-flex-pack: justify;
  justify-content: space-between;
}
.container {
  max-width: 1000px;
  margin: 0 auto;
  height: 100%;
  padding: 0 1em;
  border: 1px solid;
}
nav {
  background: #464646;
  height: 70px;
}
.box {
  background: lightblue;
  padding: 1em;
  -webkit-box-flex: 0;
  -webkit-flex: 0 0 calc(50% - 1em);
  -ms-flex: 0 0 calc(50% - 1em);
  flex: 0 0 calc(50% - 1em);
  text-align: center;
  margin: 0 0.5em 1em;
}

<nav>
  <div class="container flex align-center space-between">
    <ul>
      <li>Logo</li>
    </ul>
    <ul>
      <li>Home</li>
    </ul>
  </div>
</nav>
<div class="container">
  <header>
    <h1>Header</h1>
  </header>
</div>
<div class="container">
  <div class="gallery flex">
    <div class="box">BOX 1</div>
    <div class="box">BOX 2</div>
    <div class="box">BOX 3</div>
  </div>
</div>

Answer 2

检查下面的代码段。已解决

使用CSS

  

框：第n个孩子（2N + 1）{保证金左：0像素;}

   

 * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    ul {
      list-style-type: none;
    }
    .flex {
      display: -webkit-box;
      display: -webkit-flex;
      display: -ms-flexbox;
      display: flex;
      -webkit-flex-wrap: wrap;
      -ms-flex-wrap: wrap;
      flex-wrap: wrap;
    }
    .align-center {
      -webkit-box-align: center;
      -webkit-align-items: center;
      -ms-flex-align: center;
      align-items: center;
    }
    .space-between {
      -webkit-box-pack: justify;
      -webkit-justify-content: space-between;
      -ms-flex-pack: justify;
      justify-content: space-between;
    }
    .container {
      max-width: 1000px;
      margin: 0 auto;
      height: 100%;
      padding: 0 1em;
      border: 1px solid;
    }
    nav {
      background: #464646;
      height: 70px;
    }
    .box {
      background: lightblue;
      padding: 1em;
      -webkit-box-flex: 0;
      -webkit-flex: 0 0 calc(50% - 1em);
      -ms-flex: 0 0 calc(50% - 1em);
      flex: 0 0 calc(50% - 1em);
      text-align: center;
      margin-left: 2em;
      margin-bottom: 1em;
      }
    .box:nth-child(2n+1){
      margin-left:0px;
      }

   

 <nav>
      <div class="container flex align-center space-between">

        <ul>
          <li>Logo</li>
        </ul>

        <ul>
          <li>Home</li>
        </ul>

      </div>
    </nav>

    <div class="container">

      <header>
        <h1>Header</h1>
      </header>

    </div>

    <div class="container">

      <div class="gallery flex">
        <div class="box">BOX 1</div>
        <div class="box">BOX 2</div>
        <div class="box">BOX 3</div>
      </div>

    </div>

Answer 3

改变两件事： -

1. 删除margin-right：1em;盒子类的风格。
2. 添加新样式justify-content：space-between;在你的flex类中。