动作脚本 3 "A term is undefined and has no properties."

Question

这是我的错误

TypeError: Error #1010: A term is undefined and has no properties.
at p21_fla::MainTimeline/baba()[p21_fla.MainTimeline::frame1:24]

这是导致错误的部分：

variables.contentLoaderInfo.addEventListener(IOErrorEvent.IO_ERROR, loaderIOErrorHandler);

这是我的完整代码

var variables:URLVariables = new URLVariables(); 
variables.contentLoaderInfo.addEventListener(IOErrorEvent.IO_ERROR, loaderIOErrorHandler);
var varSend:URLRequest = new URLRequest("https://gteckids.000webhostapp.com/gteckids/login.php");
varSend.method = URLRequestMethod.POST;
varSend.data = variables;
function loaderIOErrorHandler(e:Event){
trace("Error loading image thumbnail");
}
var varLoader:URLLoader = new URLLoader;
varLoader.dataFormat = URLLoaderDataFormat.VARIABLES;
varLoader.addEventListener(Event.COMPLETE, completeHandler)
variables.Parent_Username = uname_txt.text;
variables.ParentPassword = pass_txt.text;
variables.sendRequest = "parse";    
varLoader.load(varSend);
function completeHandler(event:Event):void
{

var phpVar1 = event.target.data.var1;
if(phpVar1!="No"){
btn_ok.visible = true ;
lis.visible = true;
parent_id.text = phpVar1;

}

else{
btn_okw.visible = true ;
lis1.visible = true;
}
}

Answer 1

没错，URLVariables 的实例没有这样的成员，请查看以下规范：Adobe 文档：URLVariables。 将 IOErrorEvent 侦听器添加到加载程序，如下所示：

... 
varLoader.contentLoaderInfo.addEventListener(IOErrorEvent.IO_ERROR, loaderIOErrorHandler);
...

并且，请不要将您的代码作为屏幕截图发布。