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我有一个函数,它的数据位于 for 循环中,数据被传递到我的函数中,该函数将数据放入 URL 加载器,加载它,然后从加载的 URL 返回数据。这不起作用,就好像我尝试不停地这样做一样,URL 加载速度不够快,无法返回数据。我找不到停止的方法,所以它不会导致错误。我不能使用事件侦听器,因为它们不能返回值,而且我不能只创建一个函数来将数据分配给一个变量,因为在使用 URLloader 调用该函数的函数中需要它。我可以做一个图表来更好地解释。如果我需要以某种方式重组我的代码,我不太确定这是否可能。我试过这两种方法:这会导致堆栈溢出:

package app
{
    import flash.xml.XMLDocument;
    import flash.net.URLLoader;
    import flash.net.URLRequest;
    import flash.events.Event;
    import flash.display.MovieClip;

    public class main extends MovieClip
    {
        var geoReq:URLRequest = new URLRequest;
        var geoLoader:URLLoader = new URLLoader();
        var GeocodeResponse:XML;
        var geoLocList:XMLList = new XMLList();
        var geoLoc:Array = new Array();
        function main():void
        {
            var urlReq:URLRequest = new URLRequest("http://search.twitter.com/search.atom?q=flu&rpp=3&lang=en&geocode=55.378051,-3.435973,605mi");
            var loader:URLLoader = new URLLoader();
            loader.addEventListener(Event.COMPLETE, getTweets);
            loader.load(urlReq);
        }
        function getTweets( e:Event ):void
        {
            if ( e.target.data )
            {
                var tweets = new Array(); var times = new Array();
                var twitterXML:XML = new XML(e.target.data);
                var tweetList:XMLList = twitterXML.children();
                var tweetItem:String;
                var placeItem:String;
                var tweet:Array = new Array();
                for (var i:int = 0; i < tweetList.length(); i++)
                {
                    tweetItem = tweetList[i].*::title;
                    placeItem = tweetList[i].*::location;
                    if( tweetItem && placeItem != "")
                    {
                    placeItem = loadGeo(placeItem);
                    tweet = [tweetItem, placeItem];
                    tweets.push(tweet);
                    trace(tweets[tweets.length - 1][0]);
                    trace(tweets[tweets.length - 1][1]);
                    }
                }
                trace(tweets.length);
            }
        }
        function loadGeo(loc:String):Array
        {
            geoReq = new URLRequest("https://maps.googleapis.com/maps/api/geocode/xml?address="+loc+"&sensor=false");
            geoLoader.load(geoReq);
            GeocodeResponse = new XML(geoLoader.data);
            geoLoc = returnLoc();
            return geoLoc;
        }
        function returnLoc():Array
        {
            if(geoLoader.data == null)
            {
                returnLoc();
            }
            else
            {
                var returnD:Array = new Array(GeocodeResponse.result.geometry.location[0].lat, GeocodeResponse.result.geometry.location[0].lng);
            }
            return returnD;
        }
    }
}

这会导致错误“TypeError: Error #1010: A term is undefined and has no properties.”:

package app
{
    import flash.xml.XMLDocument;
    import flash.net.URLLoader;
    import flash.net.URLRequest;
    import flash.events.Event;
    import flash.display.MovieClip;

    public class main extends MovieClip
    {
        var geoReq:URLRequest = new URLRequest;
        var geoLoader:URLLoader = new URLLoader();
        var GeocodeResponse:XML;
        var geoLocList:XMLList = new XMLList();
        var geoLoc:Array = new Array();
        function main():void
        {
            var urlReq:URLRequest = new URLRequest("http://search.twitter.com/search.atom?q=flu&rpp=3&lang=en&geocode=55.378051,-3.435973,605mi");
            var loader:URLLoader = new URLLoader();
            loader.addEventListener(Event.COMPLETE, getTweets);
            loader.load(urlReq);
        }
        function getTweets( e:Event ):void
        {
            if ( e.target.data )
            {
                var tweets = new Array(); var times = new Array();
                var twitterXML:XML = new XML(e.target.data);
                var tweetList:XMLList = twitterXML.children();
                var tweetItem:String;
                var placeItem:String;
                var tweet:Array = new Array();
                for (var i:int = 0; i < tweetList.length(); i++)
                {
                    tweetItem = tweetList[i].*::title;
                    placeItem = tweetList[i].*::location;
                    if( tweetItem && placeItem != "")
                    {
                    placeItem = loadGeo(placeItem);
                    tweet = [tweetItem, placeItem];
                    tweets.push(tweet);
                    trace(tweets[tweets.length - 1][0]);
                    trace(tweets[tweets.length - 1][1]);
                    }
                }
                trace(tweets.length);
            }
        }
        function loadGeo(loc:String):Array
        {
            geoReq = new URLRequest("https://maps.googleapis.com/maps/api/geocode/xml?address="+loc+"&sensor=false");
            geoLoader.load(geoReq);
            GeocodeResponse = new XML(geoLoader.data);
            geoLoc = [GeocodeResponse.result.geometry.location[0].lat, GeocodeResponse.result.geometry.location[0].lng];
            return geoLoc;
        }
    }
}

请帮助,提前谢谢,凯尔。

4

1 回答 1

1

您正在等待search.twitter.com请求的完成,但您不等待地理编码请求的完成。这是错误。每次使用 Loader 时,都会使用异步等待。

于 2013-06-01T15:03:48.330 回答