如何在form表单提交后执行一个方法？ [ 2.0 版本 ]

form.php代码：

<div class="Article-form">

    <?php $form = ActiveForm::begin(); ?>

    <?= $form->field($model, 'title')->textInput(['maxlength' => 50]) ?>

    <?= $form->field($model, 'summary')->textInput(['maxlength' => 250]) ?>

	<?= $form->field($model, 'content')->textarea(['rows' => 4])->widget('kucha\ueditor\UEditor',[
        'clientOptions' => [
            'initialFrameWidth' => 500,
            'initialFrameHeight' => 300,
            'toolbars' => 'lite',
        ]
    ]) ?>

    <?= $form->field($model, 'status')->dropDownList(\common\models\Article::$statuss,['prompt'=>'请选择','style'=>'width:120px']) ?>

    <?php ActiveForm::end(); ?>

</div>

我想让他提交之后触发一个方法，请各位帮我一下