css bootstrap 类不像我写的那样工作答案

【问题标题】：css bootstrap classes not working as i wrotecss bootstrap 类不像我写的那样工作
【发布时间】：2020-04-23 21:40:29
【问题描述】：

我使用了引导程序的 row 和 col 类，但无法正常工作。

<!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">

<link href="assets/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container">
<div class="row ">
     <div style="background: cyan" class="offset-md-2 col-md-8">
        <h1 style="color: red">Login</h1>
    </div>
</div>
<form method="post" action="login">
    <div class="row" style="background: lightblue; height: 300px; width:500px;">

        <div class="col-md-12">
            <div class="col-md-4">Select Type:</div>
            <div class="col-md-8">
                <select name="user_type" ad="user_type">
                    <option value="0">Select Type</option>
                <option value="Admin" name="admin" id="admin">Admin</option>
                <option value="Teacher" name="teacher" id="teacher">Teacher</option>
                <option value="Parent" name="parent" id="parent">Parent</option>
                </select> </div>
        </div>
        <div class="col-md-12">
            <div class="col-md-4">User Name:</div>
            <div class="col-md-8"><input type="text" name="user_name" id="user_name" maxlength="63"> </div>
        </div>
        <div class="col-md-12">
            <div class="col-md-4">Password:</div>
            <div class="col-md-8"><input type="password" name="password" id="password" </div>
        </div>
        <div class="col-md-5"><input type="submit" class="btn btn-primary" name="submit"> </div>
        <div class="col-md-offset-2 col-md-5"><input type="reset" class="btn btn-danger" name="reset"> </div>

    </div>

</form>
</div>
</body>
</html>

在第一个字段中，文本选择类型和选择显示在两行中。像所有领域一样。我想要单行中的文本和输入字段。谁能帮帮我？

【问题讨论】：

您确定 bootstrap.min.css 在正确的目录中吗？你为什么不尝试使用 bootstrapCDN？ <link href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">

标签： html css bootstrap-4

【解决方案1】：

<!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">

<link href="assets/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container">
<div class="row ">
     <div style="background: cyan" class="offset-md-2 col-md-8">
        <h1 style="color: red">Login</h1>
    </div>
</div>
<form method="post" action="login">
    <div class="row" style="background: lightblue; height: 300px; width:500px;">

        <div class="col-md-12">
            <div style="float:left;"  class="col-md-4">Select Type:</div>
            <div class="col-md-8">
                <select name="user_type" ad="user_type">
                    <option value="0">Select Type</option>
                <option value="Admin" name="admin" id="admin">Admin</option>
                <option value="Teacher" name="teacher" id="teacher">Teacher</option>
                <option value="Parent" name="parent" id="parent">Parent</option>
                </select> </div>
        </div>
        <div class="col-md-12">
            <div style="float:left;" class="col-md-4">User Name:</div>
            <div class="col-md-8"><input type="text" name="user_name" id="user_name" maxlength="63"> </div>
        </div>
        <div class="col-md-12">
            <div style="float:left;" class="col-md-4">Password:</div>
            <div class="col-md-8"><input type="password" name="password" id="password" </div>
        </div>
        <div  style="float:left;" class="col-md-5"><input type="submit" class="btn btn-primary" name="submit"> </div>
        <div class="col-md-offset-2 col-md-5"><input type="reset" class="btn btn-danger" name="reset"> </div>

    </div>

</form>
</div>
</body>
</html>

【讨论】：

还是一样。没有区别
现在，我做了一些改变。你想这样做吗？
我已经复制并粘贴了您的代码，然后运行但没有发生任何变化
它适用于第一个字段。选择类型及其选择与您的代码配合良好。但剩下的 2 和按钮还是一样的
@FahadKPMuhammed 你还没有为你的表单使用所有的引导类，请检查下面的引导类链接getbootstrap.com/docs/4.4/components/forms如果你使用的是旧版本，请更改版本

【解决方案2】：

让您的生活变得轻松，不要将所有内容都放在一个 div 中。

<!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">

<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css"     rel="stylesheet" integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">


</head>
<body style="background-color: lightgray">
<div class="container">
<div class="row ">
 <div class="offset-md-2 col-md-8">
    <h1 style="color: #333">Login</h1>
</div>
</div>
<form method="post" action="login">
<div class="row">

        <div class="col-md-12">
            <h5 style="float: left;margin-left: 30px; ">Select Type:</h5>
            <select name="user_type" ad="user_type" style="float: left;     margin-left: 20px; margin-top:5px; ">
                <option value="0">Select Type</option>
            <option value="Admin" name="admin" id="admin">Admin</option>
            <option value="Teacher" name="teacher" id="teacher">Teacher</option>
            <option value="Parent" name="parent" id="parent">Parent</option>
            </select> 
        </div>
    </div>
    <div class="col-md-12">
        <div class="col-md-4">User Name:</div>
        <div class="col-md-8"><input type="text" name="user_name" id="user_name" maxlength="63"> </div>
    </div>
    <div class="col-md-12">
        <div class="col-md-4">Password:</div>
        <div class="col-md-8"><input type="password" name="password" id="password" </div>
    </div>
    <div class="col-md-5 m-2"><input type="submit" class="btn btn-primary" name="submit"> </div>
    <div class="col-md-offset-2 col-md-5 m-2"><input type="reset" class="btn btn-danger" name="reset"> </div>

</div>

</form>
</div>
</body>
</html>

【讨论】：