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AS3 代码，从示例中，我希望字符串“位置”中的值可用于主程序的其他部分。它在完成的处理程序中返回正常，但我如何使它可用于第一部分？

package  {

import flash.display.MovieClip;
import flash.display.MovieClip;
import flash.events.*
import flash.net.*;
import flash.net.URLVariables;  

public class turl extends MovieClip {

public var location:String = new String();

public function turl() {
    // constructor code 
var variables:URLVariables = new URLVariables();
variables.url = String("xxxxxxxxx");
sendAndLoad("xxxxxxxx", variables)
// THIS TRACE WILL NOT DISPLAY THE LOCATION _ A TINY URL
trace("TinyURL: " + location);
    }

function sendAndLoad(url:String, _vars:URLVariables ):void {

var request:URLRequest = new URLRequest(url);
var _urlloader:URLLoader = new URLLoader();
_urlloader.dataFormat = URLLoaderDataFormat.TEXT;
request.data = _vars;
request.method = URLRequestMethod.POST;
_urlloader.addEventListener(Event.COMPLETE, handleComplete);
_urlloader.addEventListener(IOErrorEvent.IO_ERROR, onIOError);
_urlloader.load(request);


}
function handleComplete(event:Event):void {
    var loader:URLLoader = URLLoader(event.target);
    location = loader.data;
    trace("TinyURL: " +  location);

}
function onIOError(event:IOErrorEvent):void {
    trace("Error loading URL.");
}


    }

}
4

3 回答 3

1 
package 
{
  import flash.display.MovieClip;
  import flash.display.MovieClip;
  import flash.events.*
  import flash.net.*;
  import flash.net.URLVariables;  

  public class turl extends MovieClip 
  {
    public static var Location:String;

    public function turl() {
     // constructor code 
     var variables:URLVariables = new URLVariables();
     variables.url = String("http://www.designscripting.com");
     sendAndLoad("http://tinyurl.com/api-create.php", variables)
     // THIS TRACE WILL NOT DISPLAY THE LOCATION _ A TINY URL
     trace("TinyURL: " + Location);
  }

  function sendAndLoad(url:String, _vars:URLVariables ):void
  {
     var request:URLRequest = new URLRequest(url);
     var _urlloader:URLLoader = new URLLoader();
     _urlloader.dataFormat = URLLoaderDataFormat.TEXT;
      request.data = _vars;
      request.method = URLRequestMethod.POST;
     _urlloader.addEventListener(Event.COMPLETE, handleComplete);
     _urlloader.addEventListener(IOErrorEvent.IO_ERROR, onIOError);
     _urlloader.load(request);
   }

   function handleComplete(event:Event):void {
   var loader:URLLoader = URLLoader(event.target);
   Location= loader.data;
   trace("TinyURLss: " +  Location);
   }

   function onIOError(event:IOErrorEvent):void {
   trace("Error loading URL.");
   }
}
}

静态变量Location保存您的 String 值，您可以在类内和类外的任何位置获取此 String 值。

于 2011-12-19T07:21:36.080 回答
0

构造函数中的跟踪语句不起作用，因为该跟踪是在数据请求发出之后、数据下载和位置设置之前立即发生的。构造函数用于设置对象的初始条件。使数据请求的结果立即可供构造函数使用的唯一方法是直接将其传入，但我认为这会破坏类的要点。

public function TURL(value:String)
{
    location = value;

    // Now this will work like you think.
    trace("TinyURL: " + location);
}

我猜你有其他对象依赖这个TURL类有一个正确的位置。如果是这种情况，让TURL类在设置位置变量时调度一个事件，表明它已准备好使用。

function handleComplete(event:Event):void
{
    var loader:URLLoader = URLLoader(event.target);        
    location = loader.data;

    dispatchEvent(new Event(Event.COMPLETE));
}
于 2011-12-19T06:59:17.057 回答
0

测试和工作！

var turl:Turl = new Turl("http://www.designscripting.com");

收到 URL 后，您可以通过 trace(turl.loc) 访问它；

   package  {

    import flash.display.MovieClip;
    import flash.events.*
    import flash.net.*;
    import flash.net.URLVariables;  

    public class Turl extends MovieClip {

    public var loc:String;

    public function Turl(urlToEncode:String):void {

    var variables:URLVariables = new URLVariables();
    variables.url = String(urlToEncode);
    sendAndLoad("http://tinyurl.com/api-create.php", variables);

    }


//2. send the request for the URL

    private function sendAndLoad(url:String, _vars:URLVariables ):void {

    var request:URLRequest = new URLRequest(url);
    request.data = _vars;
    request.method = URLRequestMethod.POST;

    var _urlloader:URLLoader = new URLLoader(request);
    _urlloader.dataFormat = URLLoaderDataFormat.TEXT;

    _urlloader.addEventListener(Event.COMPLETE, handleComplete, false, 0, true);
    _urlloader.addEventListener(IOErrorEvent.IO_ERROR, onIOError, false, 0, true);
    _urlloader.load(request);

    }


//3. handle the response. Only accessible once the response has been received.

    private function handleComplete(event:Event):void {

    event.target.removeEventListener(Event.COMPLETE, handleComplete);
    event.target.removeEventListener(IOErrorEvent.IO_ERROR, onIOError);

    loc = event.target.data;
    trace("loc = "+event.target.data);

    }

    function onIOError(event:IOErrorEvent):void {
    event.target.removeEventListener(Event.COMPLETE, handleComplete);
    event.target.removeEventListener(IOErrorEvent.IO_ERROR, onIOError);
    trace("Error loading URL.");
    }
}
}
于 2011-12-19T08:16:13.853 回答