这其中的原因错误是你的逻辑（推语句）是不是一种方法里面，因此，它被认为是在类水平（即静态的），而不是在实例级别。

这意味着有两种方法来解决这个问题

1 /使静态变量太多（我怀疑这是不是你想要的，但它会修正这个错误）。

 ＆LT; FX：脚本＆GT;
＆LT;！[CDATA [
    公共静态无功arrMonth：阵列=新的Array（）;

    arrMonth.push（{标签：一月}）;
]]≥
＆LT; / FX：脚本＆GT;
 

2 /把逻辑中的方法，例如：

 ＆LT; FX：脚本＆GT;
＆LT;！[CDATA [
    [可绑定]
    公共变种arrMonth：阵列=新的Array（）;

    覆盖保护功能initializationComplete（）：无效{
        super.initializationComplete（）;
        arrMonth.push（{标签：一月}）;
    }
]]≥
＆LT; / FX：脚本＆GT;
 

Why I'm getting a 1120: Access of undefined property arrMonth. error at the line arrMonth.push and how to correct it?

<fx:Script>
    <![CDATA[
        [Bindable]
        public var arrMonth:Array = new Array();

        arrMonth.push({label: "January"});
    ]]>
</fx:Script>

The reason for that error is that your logic (the push statement) is not inside a method, hence it is considered to be at class level (i.e. static) instead of at the instance level.

Which means there are two ways to fix it:

1/ Make the variable static too (I suspect this is not what you want, but it will fix the error).

<fx:Script>
<![CDATA[
    public static var arrMonth:Array = new Array();

    arrMonth.push({label: "January"});
]]>
</fx:Script>

2/ Put the logic in a method, for instance:

<fx:Script>
<![CDATA[
    [Bindable]
    public var arrMonth:Array = new Array();

    override protected function initializationComplete():void {
        super.initializationComplete();
        arrMonth.push({label: "January"});
    }
]]>
</fx:Script>