通过静态类型 Class 的引用调用可能未定义的方法 [英] Call to a possibly undefined method through a reference with static type Class

问题描述

我编写了一个单例类来跟踪应用程序中的一些变量.

I wrote a singleton class to keep track of some variables across my application.

我遇到了一个我无法弄清楚的语法错误，我确信我遗漏了一些简单的东西，但那是那些日子之一.有人发现我的代码有问题吗?

I am getting a syntax error that I can't figure out, I am sure that I am missing something simple but it's been one of those days. Anyone see something wrong with my code?

错误是 1061:通过静态类型 Class 的引用调用可能未定义的方法 setResult.

The error is 1061: Call to a possibly undefined method setResult through a reference with static type Class.

我的单例类中的函数

public function setResult(resultNumber:int, value:int): void
    {
        switch(resultNumber)
        {
            case 2: { this.result2 = value; break; }
            case 3: { this.result3 = value; break; }
            case 4: { this.result4 = value; break; }
            case 5: { this.result5 = value; break; }
            case 6: { this.result6 = value; break; }
            case 7: { this.result7 = value; break; }
            case 8: { this.result8 = value; break; }
            case 9: { this.result9 = value; break; }
            case 10: { this.result10 = value; break; }
            case 11: { this.result11 = value; break; }
            case 12: { this.result12 = value; break; }
            case 13: { this.result13 = value; break; }
            case 14: { this.result14 = value; break; }
        }
    }

我的 mxml 页面中的函数调用

My function call in my mxml page

            if(chkBox1.selected == true)
            {
                utils.Calculation.setResult(2,1);
            }

在此先感谢您的帮助！

推荐答案

假设你的单例是 Calculation 类，你是否错过了 getInstance 调用?

Assuming you singleton is the Calculation class, are you missing your getInstance call?

utils.Calculation.getInstance().setResult(2, 1);

一个好的动作单例模式:

A good actionscript singleton pattern:

package com.stackOverflow
{
    public class MySingleton
    {
        public function MySingleton(lock:Class)
        {
            if(lock != SingletonLock)
                throw new Error("This class cannot be instantiated, it is a singleton!");
        }
        private static var mySingleton:MySingleton;

        public static function getInstance():MySingleton{
            if(mySingleton==null)
                mySingleton = new MySingleton(SingletonLock);
            return mySingleton;
        }
        public function setResult(resultNumber:int, value:int): void{
        //...
        }
    }
}
class SingletonLock{}

计算类的 getInstance() 示例:

getInstance() example for the Calculation class:

private static var calculation:Calculation;
public static function getInstance():Calculation{
    if(calculation==null)
        calculation = new Calculation(SingletonLock);
    return calculation;
}

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