css 居中方式总结(包看包会)

码农天地 - 2021-01-07 14:02:19

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css 居中方式（包看包会)

<div>
<div><div>
</div>

1、水平居中方式一（推荐)

div:nth-of-type(1){
width: 100px;
height: 100px;
border: 1px solid black;
}
div:nth-of-type(1)>div{
margin: 0 auto;
width:50px;
height: 40px;
border: 1px solid black;
}

方式二：子元素设置为display:inline-block(不推荐)

div:nth-of-type(1){
width: 100px;
height: 100px;
border: 1px solid black;
text-align: center;
}
div:nth-of-type(1)>div{
display: inline-block;
width:50px;
height: 40px;
border: 1px solid black;
}

方式三 利用绝对定位，父亲设置相对定位，左右为设置为0

div:nth-of-type(1){
position: relative;
width: 100px;
height: 100px;
border: 1px solid black;
text-align: center;
}
div:nth-of-type(1)>div{
position: absolute;
left:0;
right: 0;
margin: auto;
width:50px;
height: 40px;
border: 1px solid black;
}

方式四 利用flex布局来实现

div:nth-of-type(1){
display: flex;
flex-direction: row;
justify-content: center;
width: 100px;
height: 100px;
border: 1px solid black;
text-align: center;
}
div:nth-of-type(1)>div{
width:50px;
height: 40px;
border: 1px solid black;
}

2、垂直居中方式一 利用绝对定位

div:nth-of-type(1){
position: relative;
width: 100px;
height: 100px;
border: 1px solid black;
text-align: center;
}
div:nth-of-type(1)>div{
position: absolute;
top:0;
bottom:0;
margin:auto;
width:50px;
height: 40px;
border: 1px solid black;
}

方式二 利用flex布局来实现

div:nth-of-type(1){
display: flex;
align-items: center;
width: 100px;
height: 100px;
border: 1px solid black;
text-align: center;
}
div:nth-of-type(1)>div{

width:50px;
height: 40px;
border: 1px solid black;
}

3 水平加垂直居中1、对内容进行居中

text-align:center

利用CSS进行元素的水平居中，比较简单，行级元素设置其父元素的text-align center，

line-height:200px #这里的200px为行的高度。自然内容就可以居中

2、使用display：flex 布局

div:nth-of-type(1){

    display: flex;
    flex-direction: row;
    justify-content: center;
      align-items: center;
    }

3、使用定位position 来居中方式一（不推荐)

div:nth-of-type(1){

    position: relative;
    width: 100px;
    height: 100px;
    border: 1px solid black;
}
div:nth-of-type(1)>div{
    position: absolute;
    top:50%;
    left:50%;
    margin-top:-20px;
    margin-left: -25px;
    width:50px;
    height: 40px;
    border: 1px solid black;
}

方式二（推荐)

div:nth-of-type(1){


    position: relative;
    width: 100px;
    height: 100px;
    border: 1px solid black;
}

div:nth-of-type(1)>div{
    position: absolute;
    top:0;
    left: 0;
    right: 0;
    bottom:0;
    margin:auto;
    width:50px;
    height: 40px;
    border: 1px solid black;
}

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