所属分类：web前端开发
原代码：
微博登录
QQ登录<!DOCTYPE html><html><head lang="en">
<meta charset="UTF-8">
<title></title>
<style type="text/css">
#content{
border: 1px red solid;
}
.fl{
border: 1px blueviolet solid;
height: 100px;
width: 100px;
float: left;
}
.fr{
border: 1px green solid;
height: 200px;
width: 200px;
float: right;
}
</style></head><body><p id="content">
<p class="fl">内容一</p>
<p class="fr">内容二</p></p></body></html>登录后复制显示如下：
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1、设置父元素高度：
height: 500px; /*设置父元素高度*/
登录后复制<!DOCTYPE html><html><head lang="en">
<meta charset="UTF-8">
<title></title>
<style type="text/css">
#content{
border: 1px red solid;
height: 500px; /*设置父元素高度*/
}
.fl{
border: 1px blueviolet solid;
height: 100px;
width: 100px;
float: left;
}
.fr{
border: 1px green solid;
height: 200px;
width: 200px;
float: right;
}
</style></head><body><p id="content">
<p class="fl">内容一</p>
<p class="fr">内容二</p></p></body></html>登录后复制2、父元素绝对定位：position:absolute;
<!DOCTYPE html><html><head lang="en">
<meta charset="UTF-8">
<title></title>
<style type="text/css">
#content{
border: 1px red solid;
position: absolute; /*父元素绝对定位*/ }
.fl{
border: 1px blueviolet solid;
height: 100px;
width: 100px;
float: left;
}
.fr{
border: 1px green solid;
height: 200px;
width: 200px;
float: right;
}
</style></head><body><p id="content">
<p class="fl">内容一</p>
<p class="fr">内容二</p></p></body></html>登录后复制3、父元素设置overflow：hidden
<!DOCTYPE html><html><head lang="en">
<meta charset="UTF-8">
<title></title>
<style type="text/css">
#content{
border: 1px red solid;
overflow: hidden;
}
.fl{
border: 1px blueviolet solid;
height: 100px;
width: 100px;
float: left;
}
.fr{
border: 1px green solid;
height: 200px;
width: 200px;
float: right;
}
</style></head><body><p id="content">
<p class="fl">内容一</p>
<p class="fr">内容二</p></p></body></html>登录后复制4、父元素设置浮动：float：left/right
<!DOCTYPE html><html><head lang="en">
<meta charset="UTF-8">
<title></title>
<style type="text/css">
#content{
border: 1px red solid;
float: left;
}
.fl{
border: 1px blueviolet solid;
height: 100px;
width: 100px;
float: left;
}
.fr{
border: 1px green solid;
height: 200px;
width: 200px;
float: right;
}
</style></head><body><p id="content">
<p class="fl">内容一</p>
<p class="fr">内容二</p></p></body></html>登录后复制5、在子元素最后添加一个空盒子，并设置样式为clear:both;
<!DOCTYPE html><html><head lang="en">
<meta charset="UTF-8">
<title></title>
<style type="text/css">
#content{
border: 1px red solid;
}
.fl{
border: 1px blueviolet solid;
height: 100px;
width: 100px;
float: left;
}
.fr{
border: 1px green solid;
height: 200px;
width: 200px;
float: right;
}
.clear{
clear: both;
}
</style></head><body><p id="content">
<p class="fl">内容一</p>
<p class="fr">内容二</p>
<p class="clear"></p></p></body></html>登录后复制6、在父元素样式上添加一个伪类，相当于在子元素最后添加一个空盒子，原理与5类似
<!DOCTYPE html><html><head lang="en">
<meta charset="UTF-8">
<title></title>
<style type="text/css">
#content{
border: 1px red solid;
}
.fl{
border: 1px blueviolet solid;
height: 100px;
width: 100px;
float: left;
}
.fr{
border: 1px green solid;
height: 200px;
width: 200px;
float: right;
}
#content:after{
content: '';
display: block;
/!*height: 0;*!/
clear: both;
}
</style></head><body><p id="content">
<p class="fl">内容一</p>
<p class="fr">内容二</p></p></body></html>登录后复制以上就是元素浮动的问题的详细内容，更多请关注zzsucai.com其它相关文章！
