Yii2 自定义组件

basic\components\HelloWidget

namespace app\components;
use yii\base\Widget;
use yii\helpers\Html;  

class HelloWidget extends Widget
{
    public $message;  

    public function init()
    {
      parent::init();
       if ($this->message === null) {
          $this->message = '您好';
        }
    }  

   public function run()
    {
        return Html::encode($this->message);
}

　　

View

[php] view plaincopy在CODE上查看代码片派生到我的代码片
<?php
use app\components\HelloWidget;
?>
<?= HelloWidget::widget(['message' => '组件']) ?>