Actionscript 3 AS3：函数和变量

我基本上希望做的是更改输出实例的名称

但我的问题是如何将函数“find_name”传递的变量发送到“Event.Complete”函数loadNameInfo

代码如下：

    // Finds a persons name using the ID
    private function find_name(page_Name='search.php',instance_name='name',get1='g1=1',get2='g2=2',get3='g3=3'):void
    {
        var randomParam:String = "?p=" + Math.floor(Math.random() * (10000000));
        var create_URL = (URL + page_Name + randomParam + '&'+ get1 + '&' + get2 + '&' + get3);
        _loader = new URLLoader();
        _request = new URLRequest(create_URL);
        _request.method = URLRequestMethod.POST;
        _loader.addEventListener(Event.COMPLETE, loadNameInfo);
        _loader.load(_request);
    }
    // Loads the name into the correct place
    public function loadNameInfo(e:Event)
    {
        instance_name.text = e.target.data;
    }

这可能吗

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Eli这是可能的。关于这一点有很多话题。尝试在此处搜索“as3将变量传递给事件处理程序”

一个例子是

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基本上，您可以扩展事件处理程序，将其更改为接受传递给它的另一个参数。

您可以编写自定义事件：

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我刚才遇到的另一种方法是使用内联函数。我在家里找到的

基本思路如下：

button.addEventListener(MouseEvent.CLICK, function(e:MouseEvent){handleClickEvent(e,"Home")});
function handleClickEvent(e:MouseEvent,str:String) {
    trace("Argument :"+str,"- Event target :"+e.target.name);
}

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这种样式的有趣之处在于，通过使用内联函数作为事件处理程序传递事件，然后调用所需的实际处理程序。相当整洁。我从未尝试过，但它看起来应该对我有用。

您不能将自定义值附加到URLLoader对象，但有几种解决方法

如果您只有一个加载程序，那么只需将所需的值存储在类字段中即可。如果有多个加载程序同时加载内容，则可以创建Dictionary对象以将URLLoader实例与您的值相关联。大概是这样的：

private var _loaderValues:Dictionary = new Dictionary();

private function find_name(page_Name='search.php',instance_name='name',get1='g1=1',get2='g2=2',get3='g3=3'):void
{
    var randomParam:String = "?p=" + Math.floor(Math.random() * (10000000));
    var create_URL = (URL + page_Name + randomParam + '&'+ get1 + '&' + get2 + '&' + get3);
    var loader:URLLoader = new URLLoader();
    var request:URLRequest = new URLRequest(create_URL);
    request.method = URLRequestMethod.POST;
    loader.addEventListener(Event.COMPLETE, loadNameInfo);
    loader.load(_request);
    _loaderValues[_loader] = {"pageName": page_Name, "instanceName": instance_name};
}

public function loadNameInfo(e:Event)
{
    var loader:URLLoader = e.target as URLLoader;
    instance_name.text = loader.data;
    var values:Object = _loaderValues[loader];
    trace(values["pageName"], values["instanceName"]);
    loader.removeEventListener(Event.COMPLETE, loadNameInfo);
    _loaderValues[loader] = null;
}

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删除

loadNameInfo

并使用匿名函数作为事件侦听器：

var that:* = this;   
_loader.addEventListener(Event.COMPLETE, function(e:Event):void{
     //you can access instance,which has 'instance_name' name, in 2 ways
     // 1. that[instance_name]
     // 2. that.getChildByName(instance_name)

     that[instance_name].text = e.target.data;
     //Removing anonymous listener from '_loader'
     e.target.removeEventListener(e.type, arguments.callee) ;
});

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是的，这很有可能，而且非常简单。以下是您的代码，其中包含3行以上的代码：

// Finds a persons name using the ID
private function find_name(page_Name = "search.php", instance_name = "name", get1 = "g1=1", get2 = "g2=2", get3 = "g3=3"):void {
  var randomParam:String = "?p=" + Math.floor(Math.random() * (10000000));
  var create_URL = (URL + page_Name + randomParam + "&" + get1 + "&" + get2 + "&" + get3);
  _loader = new URLLoader();
  _request = new URLRequest(create_URL);
  _request.method = URLRequestMethod.POST;
  var functionLoadNameInfo:Function = loadNameInfo(page_Name, instance_name, get1, get2, get3);
  _loader.addEventListener(Event.COMPLETE, functionLoadNameInfo);
  // To remove you do: _loader.removeEventListener(Event.COMPLETE, functionLoadNameInfo);
  _loader.load(_request);
}

// Loads the name into the correct place
public function loadNameInfo(pageName:String, instance_name:String, get1:String, get2:String, get3:String):Function {
  return function(e:Event):void {
    instance.text = e.target.data;
    instance.name = instance_name;
  }
}

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此解决方案基于。

要使用自定义事件，您需要编写自定义URLLoader类：）扩展URLLoader并不困难，还有成千上万的示例，如。我不是说这是最好的解决方案，但工作，是优雅的。无论如何，链接有4个解决方案供你选择。我同意这并不难。这是我发布的链接中的一个例子，它为这个案例提供了4种解决方案。

// Finds a persons name using the ID
private function find_name(page_Name = "search.php", instance_name = "name", get1 = "g1=1", get2 = "g2=2", get3 = "g3=3"):void {
  var randomParam:String = "?p=" + Math.floor(Math.random() * (10000000));
  var create_URL = (URL + page_Name + randomParam + "&" + get1 + "&" + get2 + "&" + get3);
  _loader = new URLLoader();
  _request = new URLRequest(create_URL);
  _request.method = URLRequestMethod.POST;
  var functionLoadNameInfo:Function = loadNameInfo(page_Name, instance_name, get1, get2, get3);
  _loader.addEventListener(Event.COMPLETE, functionLoadNameInfo);
  // To remove you do: _loader.removeEventListener(Event.COMPLETE, functionLoadNameInfo);
  _loader.load(_request);
}

// Loads the name into the correct place
public function loadNameInfo(pageName:String, instance_name:String, get1:String, get2:String, get3:String):Function {
  return function(e:Event):void {
    instance.text = e.target.data;
    instance.name = instance_name;
  }
}