如何使用flask-bootstrap垂直和水平居中标题文本 [英] How to center vertically and horizontally a heading text using flask-bootstrap

问题描述

如何在页面中间添加标题文本?我正在使用 Flask-bootstrap，我想用我自己的 CSS 样式对其进行自定义.

这是我的示例代码:

HTML

{% 扩展 "bootstrap/base.html" %}{% 块头 %}<meta charset="utf-8"><meta http-equiv="X-UA-Compatible" content="IE=edge">{{ 极好的() }}<!-- 我的抄送风格--><link rel="stylesheet" href="{{url_for('.static', filename='start.css')}}"><!-- 自定义字体--><link href="//netdna.bootstrapcdn.com/font-awesome/4.0.3/css/font-awesome.css" rel="stylesheet">{% 结束块 %}{% 块内容 %}<header class="header"><div class="text-vertical-center"><h1>欢迎来到我的网站</h1><h3>我的投资组合</h3><br><a href="#" class="btn btn-dark btn-lg">下一个站点</a>

</标题>{% 结束块 %}

CSS

html,身体 {宽度:100%；高度:100%；}身体 {字体系列:Source Sans Pro"、Helvetica Neue"、Helvetica、Arial、sans-serif；}.text-vertical-center {显示:表格单元格；文本对齐:居中；垂直对齐:中间；}.text-vertical-center h1 {边距:0；填充:0；字体大小:4.5em；字体粗细:700；}.btn-暗 {边界半径:4；颜色:#fff;背景颜色:RGBA(0,0,0,0.4)；}

我做错了什么?Chrome 中代码的结果

解决方案

如果您尝试将内容(垂直和水平)置于页面中心，您可以使用 position: absolute 和2D 变换.

*您可能希望对较小的视口使用媒体查询，但没有必要正常工作.

工作示例:

html,身体 {宽度:100%；高度:100%；}身体 {字体系列:Source Sans Pro"、Helvetica Neue"、Helvetica、Arial、sans-serif；}.header .text-vertical-center {位置:绝对；顶部:50%；左:50%；变换:翻译(-50%，-50%)；文本对齐:居中；背景:红色；}.header .text-vertical-center h1 {边距:0；填充:0；字体大小:4.5em；字体粗细:700；}.header .btn-dark {边界半径:4；颜色:#fff;背景颜色:rgba(0, 0, 0, 0.4);}@media(最大宽度:800px){.header .text-vertical-center {位置:绝对；顶部:50%；左:0；右:0；变换:translateY(-50%);}}

<link rel="stylesheet" type="text/css" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css"><header class="header"><div class="text-vertical-center"><h1>欢迎来到我的网站</h1><h3>我的投资组合</h3><br><a href="#" class="btn btn-dark btn-lg">下一个站点</a>

</header>

How can I bring a heading text in the middle of a page? I'm using flask-bootstrap and I would like to customize it with my own CSS style.

Here's my sample code:

HTML

{% extends "bootstrap/base.html" %}

{% block head %}
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
{{ super() }}
<!-- My ccs style -->
<link rel="stylesheet" href="{{url_for('.static', filename='start.css')}}">
<!-- Custom Fonts -->
<link href="//netdna.bootstrapcdn.com/font-awesome/4.0.3/css/font-  awesome.css" rel="stylesheet">
{% endblock %}

{% block content %}

<header class="header">
    <div class="text-vertical-center">
        <h1>Welcome to my Site</h1>
        <h3>My portfolio</h3>
        <br>
        <a href="#" class="btn btn-dark btn-lg">Next Site</a>
    </div>    
</header>

{% endblock %}

CSS

html,
body {
   width: 100%;
   height: 100%;
}

body {
   font-family: "Source Sans Pro","Helvetica Neue",Helvetica,Arial,sans-serif;
}

.text-vertical-center {
   display: table-cell;
   text-align: center;
   vertical-align: middle;
}

.text-vertical-center h1 {
   margin: 0;
   padding: 0;
   font-size: 4.5em;
   font-weight: 700;
}

.btn-dark {
   border-radius: 4;
   color: #fff;
   background-color: rgba(0,0,0,0.4);
}

What am I doing wrong ? The result of the code in Chrome

解决方案

If you're trying to place the content (both vertically and horizontally) center of the page you can use position: absolute with 2D Transforms.

*You may want to use a media query for smaller viewports but it isn't necessary to work correctly.

Working Example:

html,
body {
  width: 100%;
  height: 100%;
}
body {
  font-family: "Source Sans Pro", "Helvetica Neue", Helvetica, Arial, sans-serif;
}
.header .text-vertical-center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  background: red;
}
.header .text-vertical-center h1 {
  margin: 0;
  padding: 0;
  font-size: 4.5em;
  font-weight: 700;
}
.header .btn-dark {
  border-radius: 4;
  color: #fff;
  background-color: rgba(0, 0, 0, 0.4);
}
@media (max-width: 800px) {
  .header .text-vertical-center {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    transform: translateY(-50%);
  }
}

<link rel="stylesheet" type="text/css" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
<header class="header">
  <div class="text-vertical-center">
    <h1>Welcome to my Site</h1>
    <h3>My portfolio</h3>
    <br>
    <a href="#" class="btn btn-dark btn-lg">Next Site</a>
  </div>
</header>

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