## 创建表单
#### 控制器部分
```
$model = new Admin();
return $this->render('login', [
'model' => $model,
]);
```
#### 页面部分
这里的attribute属性必须在Admin模型中存在,否则会报错.
```
<?php
use \yii\bootstrap\ActiveForm;
?>
<?php $from = ActiveForm::begin(); ?>
<?php
<?= $form->field($model, 'adminuser')->textInput(['class' => 'span12', 'placeholder' => '管理员账号']) ?>
<?= $form->field($model, 'adminpass')->textInput(['class' => 'span12', 'placeholder' => '管理员密码']) ?>
echo $from->submitButton('提交');
?>
<?php ActiveForm::end(); ?>
```
#### 查看前端页面源码
发现ActiveForm自动帮我构建的内容如下:
```
<form id="w0" action="/admin/public/login" method="post">
<input type="hidden" name="_csrf"
value="rYDz4dVRFItycqeThWrJeoRkuj9bTcPV4hhTD-44zkmUy5S7hiZG8SAm9OrOOasVyz7say0g-uGJSjFHg2eGBg==">
<div class="span4 box">
<div class="content-wrap">
<h6>慕课商城 - 后台管理</h6>
<!-- <input class="span12" type="text" placeholder="管理员账号"/>-->
<div class="form-group field-admin-adminuser">
<label class="control-label" for="admin-adminuser">Adminuser</label>
<input type="text" id="admin-adminuser" class="span12" name="Admin[adminuser]" placeholder="管理员账号">
<p class="help-block help-block-error"></p>
</div>
<div class="form-group field-admin-adminpass">
<label class="control-label" for="admin-adminpass">Adminpass</label>
<input type="text" id="admin-adminpass" class="span12" name="Admin[adminpass]" placeholder="管理员密码">
<p class="help-block help-block-error"></p>
</div>
<a href="#" class="forgot">忘记密码?</a>
<div class="remember">
<input id="remember-me" type="checkbox"/>
<label for="remember-me">记住我</label>
</div>
<a class="btn-glow primary login" href="index.html">登录</a>
</div>
</div>
<div class="span4 no-account">
<p>没有账户?</p>
<a href="signup.html">注册</a>
</div>
</form>
```
