两列布局
效果：
4.1 左列定宽,右列自适应
(1)利用float+margin实现
html代码:
<body> <div id="left">左列定宽</div> <div id="right">右列自适应</div> </body>
css代码:
#left { background-color: #f00; float: left; width: 100px; height: 500px; } #right { background-color: #0f0; height: 500px; margin-left: 100px; /*大于等于#left的宽度*/ }
(2)利用float+margin(fix)实现
html代码:
<body> <div id="left">左列定宽</div> <div id="right-fix"> <div id="right">右列自适应</div> </div> </body>
css代码:
#left { background-color: #f00; float: left; width: 100px; height: 500px; } #right-fix { float: right; width: 100%; margin-left: -100px; /*正值大于或等于#left的宽度,才能显示在同一行*/ } #right{ margin-left: 100px; /*大于或等于#left的宽度*/ background-color: #0f0; height: 500px; }
(3)使用float+overflow实现
html代码:
<body> <div id="left">左列定宽</div> <div id="right">右列自适应</div> </body>
css代码:
#left { background-color: #f00; float: left; width: 100px; height: 500px; } #right { background-color: #0f0; height: 500px; overflow: hidden; /*触发bfc达到自适应*/ }
(4)使用table实现
html代码:
<div id="parent"> <div id="left">左列定宽</div> <div id="right">右列自适应</div> </div>
css代码:
#parent{
100%;
display: table;
height: 500px;
}
#left {
100px;
background-color: #f00;
}
#right {
background-color: #0f0;
}
#left,#right{
display: table-cell; /*利用单元格自动分配宽度*/
}
(5)使用绝对定位实现
html代码:
<body> <div id="parent"> <div id="left">左列定宽</div> <div id="right">右列自适应</div> </div> </body>
css代码:
#parent{ position: relative; /*子绝父相*/ } #left { position: absolute; top: 0; left: 0; background-color: #f00; width: 100px; height: 500px; } #right { position: absolute; top: 0; left: 100px; /*值大于等于#left的宽度*/ right: 0; background-color: #0f0; height: 500px; }
(6)使用flex实现
html代码:
<body> <div id="parent"> <div id="left">左列定宽</div> <div id="right">右列自适应</div> </div> </body>
css代码:
#parent{ width: 100%; height: 500px; display: flex; } #left { width: 100px; background-color: #f00; } #right { flex: 1; /*让所有弹性盒模型对象的子元素都有相同的长度，忽略它们内部的内容：*/ background-color: #0f0; }
4.2 左列自适应,右列定宽
html代码:
<body> <div id="parent"> <div id="left">左列自适应</div> <div id="right">右列定宽</div> </div> </body>
css代码:
#parent{ height: 500px; padding-left: 100px; /*抵消#left的margin-left以达到#parent水平居中*/ } #left { width: 100%; height: 500px; float: left; margin-left: -100px; /*正值等于#right的宽度*/ background-color: #f00; } #right { height: 500px; width: 100px; float: right; background-color: #0f0; }
(2)使用float+overflow实现
html代码:
<body> <div id="parent"> <div id="right">右列定宽</div> <div id="left">左列自适应</div> <!--顺序要换一下--> </div> </body>
css代码:
#left { overflow: hidden; /*触发bfc*/ height: 500px; background-color: #f00; } #right { margin-left: 10px; /*margin需要定义在#right中*/ float: right; width: 100px; height: 500px; background-color: #0f0; }
(3)使用table实现
html代码:
<body> <div id="parent"> <div id="left">左列自适应</div> <div id="right">右列定宽</div> </div> </body>
css代码:
#parent{ width: 100%; height: 500px; display: table; } #left { background-color: #f00; display: table-cell; } #right { width: 100px; background-color: #0f0; display: table-cell; }
(4)使用绝对定位实现
html代码:
<body> <div id="parent"> <div id="left">左列自适应</div> <div id="right">右列定宽</div> </div> </body>
css代码:
#parent{ position: relative; /*子绝父相*/ } #left { position: absolute; top: 0; left: 0; right: 100px; /*大于等于#rigth的宽度*/ background-color: #f00; height: 500px; } #right { position: absolute; top: 0; right: 0; background-color: #0f0; width: 100px; height: 500px; }
(5)使用flex实现
html代码:
<body> <div id="parent"> <div id="left">左列自适应</div> <div id="right">右列定宽</div> </div> </body>
css代码:
#parent{ height: 500px; display: flex; } #left { flex: 1; background-color: #f00; } #right { width: 100px; background-color: #0f0; }
4.3 一列不定,一列自适应
(盒子宽度随着内容增加或减少发生变化,另一个盒子自适应)
(1)使用float+overflow实现
html代码:
<body> <div id="parent"> <div id="left">左列不定宽</div> <div id="right">右列自适应</div> </div> </body>
css代码:
#left { margin-right: 10px; float: left; /*只设置浮动,不设宽度*/ height: 500px; background-color: #f00; } #right { overflow: hidden; /*触发bfc*/ height: 500px; background-color: #0f0; }
(2)使用flex实现
html代码:
<body> <div id="parent"> <div id="left">左列不定宽</div> <div id="right">右列自适应</div> </div> </body>
css代码:
#parent{ display: flex; } #left { /*不设宽度*/ margin-right: 10px; height: 500px; background-color: #f00; } #right { height: 500px; background-color: #0f0; flex: 1; /*均分#parent剩余的部分*/ }