动态调用函数

Question

我们如何动态调用函数。我曾尝试下面的代码：

public function checkFunc() : void 
{ 
    Alert.show("inside function"); 
} 
public var myfunc:String = "checkFunc"; 
public var newFunc:Function=Function(myfunc); 
newFunc(); 

但它给错误：

Call to a possibly undefined method newFunc.

在地方newFunc()，我试着给它this[newFunc]()，但抛出的错误：

The this keyword can not be used in static methods. It can only be used in instance methods, function closures, and global code

任何帮助动态调用函数？

Answer 1

功能的工作方式相同属性，你可以给它们分配变量以同样的方式，这意味着所有时髦的方括号技巧也适用于他们。

public function checkFunc() : void 
{ 
    Alert.show("inside function"); 
} 
public var myfunc:String = "checkFunc"; 
public var newFunc:Function = this[myfunc]; 
newFunc(); 

[的Flex/AS3？ - 调用一个函数动态地使用字符串]的

Answer 2

从taskinoor's answer到this question：在闪光

instance1[functionName]();

Check this for some details.

Answer 3

函数是对象，并且作为这样的功能，就像任何物体一样。 AS3 API显示一个函数有一个call（）方法。你在你的代码非常接近：

// Get your functions 
var func : Function = someFunction; 

// call() has some parameters to achieve varying types of function calling and params 
// I typically have found myself using call(null, args); 
func.call(null); // Calls a function 
func.call(null, param1, param2); // Calls a function with parameters 

Answer 4

代码未经测试，但应该工作

package { 
    public class SomeClass{ 
    public function SomeClass():void{ 
    } 
    public function someFunc(val:String):void{ 
     trace(val); 
    } 
    public function someOtherFunc():void{ 
     this['someFunc']('this string is passed from inside the class'); 
    } 
    } 
} 


// usage 
var someClass:SomeClass = new SomeClass(); 
someClass['someFunc']('this string is passed as a parameter'); 
someClass.someOtherFunc(); 







// mxml example 
// Again untested code but, you should be able to cut and paste this example. 

<?xml version="1.0" encoding="utf-8"?> 
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" creationComplete="someOtherFunc()" > 
    <mx:Script> 
    <![CDATA[ 
     public function someFunc(val:String):void{ 
     trace(val); 
     this.theLabel.text = val 
     } 
     public function someOtherFunc():void{ 

     // this is where call the function using a string 
     this['someFunc']('this string is passed from inside the class'); 
     } 
    ]]> 
    </mx:Script> 

    <mx:Label id="theLabel" /> 
</mx:Application>