由于AS3中的URLloader，嵌套函数调用的运行顺序延迟/改变了？(Running-order of nested function-calls delayed/altered due to URLloader in AS3?)

 首先：英语不是我的第一语言。 ;-) 
 
 我正在编译以下代码： 
 
var sqldata:String;
function sql(saveorload,sqlstring) {
    var sqlloader = new URLLoader();
    var sqlrequest = new URLRequest("http://***/sql.php");
    sqlrequest.method = URLRequestMethod.POST;
    sqlloader.addEventListener(Event.COMPLETE, sqldonetrace);

    var variables:URLVariables = new URLVariables();
    variables.sqlm = saveorload;
    variables.sqlq = sqlstring;
    sqlrequest.data = variables;

    sqlloader.load(sqlrequest);
}
function sqldonetrace(e:Event) {
    sqldata = e.target.data;
}
sql("1","SELECT * FROM songs WHERE `flag2` LIKE '0'");
trace (sqldata);
 
 所以，问题出现了：“sqldata”被追踪为“null”。 AS3似乎运行“sql”，然后“跟踪”然后“sqldone”，但我需要sql - > sqldone - > trace ...我不能把trace-command放在sqldone函数中因为它存储了as * .as并在我的.swf中的不同点加载，并不总是只跟踪一个trace-command。 
 
 脚本中的任何想法/提示/缺陷？ 

First of all: English is not my first language. ;-)
 
I am compiling the following code:
 
var sqldata:String;
function sql(saveorload,sqlstring) {
    var sqlloader = new URLLoader();
    var sqlrequest = new URLRequest("http://***/sql.php");
    sqlrequest.method = URLRequestMethod.POST;
    sqlloader.addEventListener(Event.COMPLETE, sqldonetrace);

    var variables:URLVariables = new URLVariables();
    variables.sqlm = saveorload;
    variables.sqlq = sqlstring;
    sqlrequest.data = variables;

    sqlloader.load(sqlrequest);
}
function sqldonetrace(e:Event) {
    sqldata = e.target.data;
}
sql("1","SELECT * FROM songs WHERE `flag2` LIKE '0'");
trace (sqldata);
 
So, here comes the problem: "sqldata" is traced as "null". AS3 seems to run "sql", then "trace" and then "sqldone", but i would need sql -> sqldone -> trace... I can't put the trace-command in the sqldone-function because it is stored as *.as and loaded at different points in my .swf and not always followed by only a trace-command.
 
Any Ideas/hints/flaws in script?

原文：https://stackoverflow.com/questions/16153739