Yii2：多事件附加在视图上 [英] Yii2: multiple event attach on view

问题描述

嗨，

我想尝试制作一些动态边栏和内容，我有触发事件多次查看，


这里我的代码：

Hi,
I want try to make some dynamic sidebar and content, I have trigger event multiple times in view,
here my code:

后端/查看/布局/ _sidebar.php

use common\component\Hook;
use yii\base\Event;

Event::trigger(Hook::className(), Hook::SIDEBAR_MENU);

后端/视图/ ext / index.php

use common\component\Hook;
use yii\base\Event;

Event::trigger(Hook::className(), Hook::PlUGIN_CONTENT);

common / component / Hook.php

namespace common\component;

use yii\base\Component;

class Hook extends Component{

    const SIDEBAR_MENU = '';
    const PlUGIN_CONTENT = '';

}

backend\plugins\Plugin\ index.php

namespace backend\plugins\Plugin;

use Yii;
use common\component\Hook;
use yii\base\Event;
use yii\helpers\Html;

class Index extends Event{
    function sidebar() {
        echo '<li>' . Html::a('Menu Plugin 1', ['/ext?n=Plugin']) . '</li>';
    }

    function renderContent(){
        echo 'this is content';
    }
}

Event::on(Hook::className(), Hook::SIDEBAR_MENU, [new Index, 'sidebar']);
Event::on(Hook::className(), Hook::PlUGIN_CONTENT, [new Index, 'renderContent']);

backend\plugins\Plugin2\index.php

namespace backend\plugins\Plugin2;

use Yii;
use common\component\Hook;
use yii\base\Event;
use yii\helpers\Html;

Event::on(Hook::className(), Hook::SIDEBAR_MENU, function () {
    echo '<li>' . Html::a('Menu Plugin 2', ['/ext?n=Plugin2']) . '</li>';
});

这里我的控制器后端/控制器/ ExtController.php

namespace backend\controllers;

use Yii;
use yii\web\Controller;

class ExtController extends Controller
{
    public function actionIndex(){    
        return $this->render('index');
    }

}

问题： strong>

question:

1. 为什么他们在_sidebar.php中多次出现？我只是在sidebar.php中触发SIDEBAR MENU，为什么他们触发SIDEBAR_MENU在同样的时间里，PLUGIN_CONTENT？


2. 我在后端/ view / ext / index.php中也有触发事件，但是没有触发PLUGIN_CONTENT，所以内容不会出现

推荐答案

在hook.php中，它们都具有相同的值，即空字符串，它们有值

in hook.php, they both have same value, which is empty string "", they mush have value

namespace common\component;

use yii\base\Component;

class Hook extends Component{

    const SIDEBAR_MENU = 'sidebarMenu';
    const PlUGIN_CONTENT = 'pluginContent';

}

这篇关于Yii2：多事件附加在视图上的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！