Flex：我应该通过哪种方式添加这个事件处理程序？

发布于 2024-11-09 02:59:18 字数 785 浏览 0 评论 0原文

我在我的 Flex 项目中经常使用工作单元模式。我将有一个类可以调用 Web 服务，将数据放入 sqlite 数据库中，使用数据刷新模型，然后引发事件。

我通常将它们称为内联并传入一些单例类：

protected function CareerSynced():void
    {
        var process:ProcessWorkouts = new ProcessWorkouts(_dataModel, _trainerModel, _databaseCache, _database.Conn);
        process.addEventListener("AllWorkoutsProcessed", AllWorkoutsProcessed);
        process.UpdateAllUnprocessed();
    }

然后我会得到如下响应：

private function AllWorkoutsProcessed(event:DataReceivedEvent):void
    {
    //do something here 
    }

我的问题是，我是否正确添加了该事件侦听器？我认为我可能会导致内存泄漏，但我不确定。我也考虑过使用弱引用。我对何时使用它们感到困惑。这会是其中之一吗？

应该是这样吗？

process.addEventListener("AllWorkoutsProcessed", AllWorkoutsProcessed,false, 0, true);

原文

I use a unit of work pattern a lot in my flex projects. I'll have a class that might call a web service, put the data in a sqlite db, refresh a model with the data then raise an event.

I usually call these inline and pass in some singleton classes:

protected function CareerSynced():void
    {
        var process:ProcessWorkouts = new ProcessWorkouts(_dataModel, _trainerModel, _databaseCache, _database.Conn);
        process.addEventListener("AllWorkoutsProcessed", AllWorkoutsProcessed);
        process.UpdateAllUnprocessed();
    }

I'll then get the response like this:

private function AllWorkoutsProcessed(event:DataReceivedEvent):void
    {
    //do something here 
    }

My question is, am I adding that event listener correctly? I think I might be causing a memory leak, but I'm not sure. I've also thought about using a weak reference. I'm confused about when to use them. Would this be one of those cases?

Should it be like this?

process.addEventListener("AllWorkoutsProcessed", AllWorkoutsProcessed,false, 0, true);

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天冷不及心凉 2024-11-16 02:59:18

我要么选择弱引用，要么删除监听器：

private function AllWorkoutsProcessed(event:DataReceivedEvent):void
{
     event.target.removeEventListener("AllWorksoutsProcessed",AllWorkoutsProcessed);
}

我可以列出我的原因，但我只会向您指出这个。

I would either go with the weak reference or just remove the listener:

private function AllWorkoutsProcessed(event:DataReceivedEvent):void
{
     event.target.removeEventListener("AllWorksoutsProcessed",AllWorkoutsProcessed);
}

I could list out my reasons but I'll just point you to this.

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