Float, table, flex solve the problems and solutions of equal layout
Solve the problem
Solve the problem of float
Problem 1: If you add spacing to the sub-blocks, it will cause a row to be insufficiently divided and some blocks will be squeezed
盒子模型：box-sizing：
content-box:盒子模型 width宽度 = width + padding-left/right + border-left/right
border-box:怪异盒模型 width宽度 =width（padding+border已经计算进去了）
margin 不影响盒子模型的大小 => 间距 / 位置移动
- The solution to problem one. Method one to solve the border line: add box-sizing: border-box
Problem 2: After the margin is made with the box model, there is a gap in the left margin of the first module.
- Wrong approach: Although you can deceive yourself visually, the leftmost module is actually bigger than the others
.col1:first-child{
border: 0px;
}
Solution to problem two:
Solution one: move the whole to the left-hide the spacing
#parent{
height: 300px;
/*对问题二的解决：整体往左边移动 - 间距隐藏起来*/
margin-left: -10px;
}
Solution 2: The padding has been calculated into 25%, and the padding is part of the content.
The code block after the solution:
.col1,
.col2,
.col3,
.col4 {
height: 300px;
/*等分 = float 100%/4*/
width: 25%;
float: left;
/*解决方法二：padding已经计算进了25%，padding是内容的一部分*/
padding-left: 10px;
box-sizing: border-box;
}
Resolved code block:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>5.1等分布局利用float+盒子模型用padding解决（解决方法二）</title>
<style>
*{
margin: 0;padding: 0;}
/* clearfix进行清浮动的封装 => 公用代码*/
.clearfix::after{
content: '';
display: block;
clear: both;
}
.parent-fix {
overflow: hidden;
}
#parent{
height: 300px;
margin-left: -10px;
}
.col1,
.col2,
.col3,
.col4 {
height: 300px;
/*等分 = float 100%/4*/
width: 25%;
float: left;
/*解决方法二：padding已经计算进了25%，padding是内容的一部分*/
padding-left: 10px;
box-sizing: border-box;
}
.col1 .inner{
height: 300px; background-color:hotpink}
.col2 .inner{
height: 300px; background-color:rgb(105, 220, 255)}
.col3 .inner{
height: 300px; background-color:rgb(21, 255, 33)}
.col4 .inner{
height: 300px; background-color:rgb(203, 255, 13)}
</style>
</head>
<body>
<div class="parent-fix">
<!-- 作为父级容器 -->
<div id="parent" class="clearfix">
<div class="col1">
<div class="inner"></div>
</div>
<div class="col2">
<div class="inner"></div>
</div>
<div class="col3">
<div class="inner"></div>
</div>
<div class="col4">
<div class="inner"></div>
</div>
</div>
</div>
</body>
</html>
Solve the problem of table
Problem margin-left: -10px; causes the right side to be misaligned
Problem: If the padding-left: 10px; is removed from the first module, the first module will disappear directly
solution:
/*解决右边又不对齐*/
.parent-wrap {
margin-left:-10px;
}
解决的代码：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>5.1等分布局利用float+盒子模型用padding解决（解决方法二）</title>
<style>
*{
margin: 0;padding: 0;}
/*解决右边又不对齐*/
.parent-wrap {
margin-left:-10px;
}
#parent{
width: 100%;
/*问题 margin-left: -10px;导致右边不对齐了 */
/*table*/
display:table;
}
.col1,
.col2,
.col3,
.col4 {
/*td*/
display:table-cell;
height: 300px;
padding-left: 10px;
/*内部计算 padding-left*/
}
/*问题：第一个模块如果去掉padding-left: 10px;会导致第一个模块直接消失了*/
/* .col1{
padding-left: 0px;
} */
.col1 .inner{
height: 300px; background-color:hotpink}
.col2 .inner{
height: 300px; background-color:rgb(105, 220, 255)}
.col3 .inner{
height: 300px; background-color:rgb(21, 255, 33)}
.col4 .inner{
height: 300px; background-color:rgb(203, 255, 13)}
</style>
</head>
<body>
<div class="parent-wrap">
<!-- 作为父级容器 -->
<div id="parent">
<div class="col1">
<div class="inner"></div>
</div>
<div class="col2">
<div class="inner"></div>
</div>
<div class="col3">
<div class="inner"></div>
</div>
<div class="col4">
<div class="inner"></div>
</div>
</div>
</div>
</body>
</html>
Solve the problem of flex
Code:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>5.1等分布局利用float+盒子模型用padding解决（解决方法二）</title>
<style>
*{
margin: 0;padding: 0;}
/*解决右边又不对齐*/
.parent-wrap {
margin-left:-10px;
}
#parent{
width: 100%;
/*问题 margin-left: -10px;导致右边不对齐了 */
/*table*/
display:table;
}
.col1,
.col2,
.col3,
.col4 {
/*td*/
display:table-cell;
height: 300px;
padding-left: 10px;
/*内部计算 padding-left*/
}
/*问题：第一个模块如果去掉padding-left: 10px;会导致第一个模块直接消失了*/
/* .col1{
padding-left: 0px;
} */
.col1 .inner{
height: 300px; background-color:hotpink}
.col2 .inner{
height: 300px; background-color:rgb(105, 220, 255)}
.col3 .inner{
height: 300px; background-color:rgb(21, 255, 33)}
.col4 .inner{
height: 300px; background-color:rgb(203, 255, 13)}
</style>
</head>
<body>
<div class="parent-wrap">
<!-- 作为父级容器 -->
<div id="parent">
<div class="col1">
<div class="inner"></div>
</div>
<div class="col2">
<div class="inner"></div>
</div>
<div class="col3">
<div class="inner"></div>
</div>
<div class="col4">
<div class="inner"></div>
</div>
</div>
</div>
</body>
</html>