/**
* @param callable $callback
* @param string $class
*/
public function __construct(callable $callback, $class)
{
parent::__construct($callback, function ($event) use($class) {
return is_object($event) && get_class($event) == $class;
});
}
/**
* 判断是否存在监听者
* @param string $eventName
* @param mixed $listener
* @return boolean
*/
function hasListener($eventName, $listener)
{
if (empty($this->listeners[$eventName])) {
return false;
}
if (is_callable($listener)) {
$listener = CallbackListener::newFromCallable($listener);
}
return $this->listeners[$eventName]->contains($listener);
}
