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朴灿烈づ我的快乐病毒、 2022-05-28 08:14 196阅读 0赞

## 1、模块化设计 ##

模块之间相互独立，需要借助命名空间
    app\modules\article\Article
    article
    
    //main文件
    'modules' => [
        'article' => [
            'class' => 'app\modules\article\Article',
        ],
    ],
    
    //在控制器中获取子模块
    $article = \Yii::$app->getModule('article);
    
    //调用子模块的操作
    $article->runAction('default/index);

## 2、事件 ##

on()    绑定事件  
    trigger() 触发事件

cat
    <?php
    namespace Vendor\animal;
    use \yii\base\Component;
    class Cat extends Component
    {
         
        public function shout()
        {
         
            echo "my name is cat";
            $this->trigger('miao');
        }
    }
    
    Mouse
    <?php
    namespace Vendor\animal;
    use yii\base\Component;
    class Mouse extends Component
    {
         
        public function run()
        {
         
            echo "my name is Mouse";
        }
    }
    
    <?php
    namespace backend\controllers;
    use yii\web\Controller;
    use vendor\animal\Cat;
    use vendor\animal\Mouse;
    class AnimalController extends Controller
    {
         
        public function actionIndex()
        {
         
            $cat = new Cat;
            $mouse =  new Mouse;
            $cat->on('miao',[$mouse,'run']);//绑定事件
            $cat->shout();
        }
    }

注意事件的先后执行顺序

给事件绑定参数

<?php
    namespace backend\controllers;
    use yii\web\Controller;
    use vendor\animal\Cat;
    use vendor\animal\Mouse;
    class AnimalController extends Controller
    {
         
        public function actionIndex()
        {
         
            $cat = new Cat;
            $mouse =  new Mouse;
            $cat->on('miao',[$mouse,'run']);//绑定事件
            $cat->shout();
        }
    }
    
    <?php
    namespace Vendor\animal;
    use \yii\base\Component;
    use yii\base\Event;
    
    class MyEvent extends Event
    {
         
        public $message;
    }
    
    class Cat extends Component
    {
         
        public function shout()
        {
         
            echo "my name is cat <br>";
    //        $this->trigger('miao');
            $me = new MyEvent();
            $me->message = 'helo my event';
            $this->trigger('miao',$me);
        }
    }
    
    <?php
    namespace Vendor\animal;
    use yii\base\Component;
    
    class Mouse extends Component
    {
         
        public function run($e)
        {
         
            echo "my name is Mouse <br>";
            echo  $e->message;
        }
    }

绑定多个事件

<?php
    namespace backend\controllers;
    use vendor\animal\Dog;
    use yii\web\Controller;
    use vendor\animal\Cat;
    use vendor\animal\Mouse;
    class AnimalController extends Controller
    {
        
        public function actionIndex()
        {
        
            $cat = new Cat;
            $mouse =  new Mouse;
            $cat->on('miao',[$mouse,'run']);//绑定事件
            $dog = new Dog();
            $cat->on('miao',[$dog,'look']);//绑定事件
            $cat->shout();
        }
    }
    
    <?php
    namespace vendor\animal;
    class Dog
    {
        
        public function look()
        {
        
            echo 'my name is Dog';
        }
    }

取消事件绑定

$cat->on('miao',[$dog,'look']);//绑定事件
    $cat->off('miao',[$dog,'look']);//取消绑定事件

另一个对象，不会被触发

$cat = new Cat;
    $cat2 = new Cat;
    $mouse =  new Mouse;
    $cat->on('miao',[$mouse,'run']);//绑定事件
    $dog = new Dog();
    $cat->on('miao',[$dog,'look']);//绑定事件
    $cat->off('miao',[$dog,'look']);//取消绑定事件
    $cat->shout();
    $cat2->shout();

类级别的事件处理器

Event::on(Cat::className(),'miao',[$mouse,'run']);

匿名函数绑定事件

Event::on(Cat::className(),'miao',function (){
        
                echo 'miao event has triggered <br>';
            });

应用主体

\Yii::$app->on(\yii\base\Application::EVENT_AFTER_REQUEST,function(){
        
                echo "event after request";
            });
    
            echo 'hello index action <br>';