如何将图像背景添加到btn-default twitter-bootstrap按钮？ [英] How to add image background to btn-default twitter-bootstrap button?

问题描述

我尝试使用现有的类 btn-default 设计一个bootstrap v3.3.5按钮，以下是我所做的代码示例。

I try to design a bootstrap v3.3.5 button by using the existing class btn-default, below are the sample of codes of what I had done.

<!-- Latest compiled and minified CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">

<!-- Optional theme -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap-theme.min.css">

<!-- Latest compiled and minified JavaScript -->
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>


<style type="text/css">
  .sign-in-facebook
  {
    background-image: url('http://i.stack.imgur.com/e2S63.png');
    background-position: -9px -7px;
    background-repeat: no-repeat;
    background-size: 39px 43px;
    padding-left: 41px;
    color: #000;
  }
  .sign-in-facebook:hover
  {
    background-image: url('http://i.stack.imgur.com/e2S63.png');
    background-position: -9px -7px;
    background-repeat: no-repeat;
    background-size: 39px 43px;
    padding-left: 41px;
    color: #000;
  }
</style>
<p>My current button got white background<br/>
<input type="button" value="Sign In with Facebook" class="btn btn-default sign-in-facebook" style="margin-top:2px; margin-bottom:2px;" >
</p>
<p>I need the current btn-default style like below<br/>
<input type="button" class="btn btn-default" value="Sign In with Facebook" />
</p>
<strong>NOTE:</strong> facebook icon at left side of the button.

示例Facebook图标：

Sample facebook icon:

如何修改 .sign-in-facebook 的类以创建自己的样式按钮？

How I can modify the class of .sign-in-facebook to create my own style button ?

推荐答案

代替使用输入类型按钮，可以使用按钮并将图像插入按钮内容中。

Instead of using input type button you can use button and insert the image inside the button content.

<button class="btn btn-default">
     <img src="http://i.stack.imgur.com/e2S63.png" width="20" /> Sign In with Facebook
</button>

仅在CSS上执行此操作的问题是无法设置 linear-渐变必须使用纯色。

The problem with doing this only with CSS is that you cannot set linear-gradient to the background you must use solid color.

.sign-in-facebook {
    background: url('http://i.stack.imgur.com/e2S63.png') #f2f2f2;
    background-position: -9px -7px;
    background-repeat: no-repeat;
    background-size: 39px 43px;
    padding-left: 41px;
    color: #000;
  }
  .sign-in-facebook:hover {
    background: url('http://i.stack.imgur.com/e2S63.png') #e0e0e0;
    background-position: -9px -7px;
    background-repeat: no-repeat;
    background-size: 39px 43px;
    padding-left: 41px;
    color: #000;
  }

body {
  padding: 30px;
}

<!-- Latest compiled and minified CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">

<!-- Optional theme -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap-theme.min.css">

<!-- Latest compiled and minified JavaScript -->
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>

<style type="text/css">
  .sign-in-facebook {
    background: url('http://i.stack.imgur.com/e2S63.png') #f2f2f2;
    background-position: -9px -7px;
    background-repeat: no-repeat;
    background-size: 39px 43px;
    padding-left: 41px;
    color: #000;
  }
  .sign-in-facebook:hover {
    background: url('http://i.stack.imgur.com/e2S63.png') #e0e0e0;
    background-position: -9px -7px;
    background-repeat: no-repeat;
    background-size: 39px 43px;
    padding-left: 41px;
    color: #000;
  }
</style>


<h4>Only with CSS</h4>

<input type="button" value="Sign In with Facebook" class="btn btn-default sign-in-facebook" style="margin-top:2px; margin-bottom:2px;">

<h4>Only with HTML</h4>

<button class="btn btn-default">
  <img src="http://i.stack.imgur.com/e2S63.png" width="20" /> Sign In with Facebook
</button>

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