CSS / Flexbox：弹性项目上的滚动条？

问题描述 投票：0回答：2

如何获得作为弹性项的div上的滚动条？我有以下设置：

    <div class="main">
        <div class="search-bar">
            <input type="text"></input>
        </div>

        <div class="search-results">
            <table>
                <tr>
                    <td>
                        <div class="main-info">
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                        </div>
                    </td>
                </tr>

                <tr>
                    <td>
                        <div class="main-info">
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                        </div>
                    </td>
                </tr>

                <tr>
                    <td>
                        <div class="main-info">
                            Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test
                        </div>
                    </td>
                </tr>
            </table>
        </div>
    </div>

使用CSS：

    .main-info {
        width: 650px;
        height: 350px;
        box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
    }
    .main {
        display: flex;
        flex-direction: column;
    }
    .search-bar {
        flex : 1;
    }
    .search-results {
        flex: 1;
        overflow-y: auto;
    }

当表格项目不适合页面时，整个页面都会显示滚动条。但是我想要的是search-results div可垂直滚动，而search-bar保持固定在页面顶部。我注意到，如果我为max-height指定一个search-results并给它一个较小的值，如100px，那么div将获得滚动条，但是如何在不指定此最小高度的情况下得到它呢？

JSFiddle：https://jsfiddle.net/gw7f8shy/

javascript html css flexbox
2个回答
0
投票

您应在CSS中使用max-height属性

<div class="main">
        <div class="search-bar">
            <input type="text"></input>
        </div>

        <div class="search-results">
            <table>
                <tr>
                    <td>
                        <div class="main-info">
                            Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test
                        </div>
                    </td>
                </tr>

                <tr>
                    <td>
                        <div class="main-info">
                            Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test
                        </div>
                    </td>
                </tr>

                <tr>
                    <td>
                        <div class="main-info">
                            Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test
                        </div>
                    </td>
                </tr>
            </table>
        </div>
    </div>

此处的CSS代码：

.main-info {
        width: 650px;
        height: 350px;
        box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
    }
    .main {
        display: flex;
        flex-direction: column;
    }
    .search-bar {
        flex : 1;
    }
    .search-results {
        flex: 1;
        overflow-y: auto;
        max-height: 400px;
    }
0
投票

我希望这是您的期望。

更改这些CSS属性。

.search-bar {
    flex: 1;
    position: sticky; /* or u can use position:fixed */
    top: 0;
    z-index: 9;
}


.main-info {
  width: 650px;
  height: inherit;
  box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
}

.main-info {
  height: calc(100vh - 30px);
}

.main {
  display: flex;
  flex-direction: column;
}

.search-bar {
  flex: 1;
  position: sticky;
  /* or u can use position:fixed */
  top: 0;
  z-index: 9;
}

.search-results {
  flex: 1;
  max-height: calc(100vh - 30px);
  overflow-y: auto;
}
<html>

<head>
  <title>Subway-Mobile</title>
</head>

<body>

  <div class="main">
    <div class="search-bar">
      <input type="text" />
    </div>

    <div class="search-results">
      <table>
        <tr>
          <td>
            <div class="main-info">
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            </div>
          </td>
        </tr>

        <tr>
          <td>
            <div class="main-info">
              Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test
            </div>
          </td>
        </tr>

        <tr>
          <td>
            <div class="main-info">
              Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test
            </div>
          </td>
        </tr>


        <tr>
          <td>
            <div class="main-info">
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            </div>
          </td>
        </tr>

        <tr>
          <td>
            <div class="main-info">
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            </div>
          </td>
        </tr>


        <tr>
          <td>
            <div class="main-info">
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            </div>
          </td>
        </tr>
      </table>
    </div>
  </div>
</body>

</html>
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