Question

我通常不是一个JavaScript家伙，所以这对我来说有点陌生。

我试图创建一个可以在主脚本中调用函数的JavaScript类。这是一个例子：

<!DOCTYPE html>
<html>
    <head>
        <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.min.js"></script>
        <script type="text/javascript">

            function ChildClass(){

                this.X;
                this.Y;

                this.DoMath = function(){

                    var answer = this.X + this.Y;

                    // I'm trying to pass the answer variable back to the "DoMathResponse" function.  Currently, the "DoMathRequest" 
                    // is passed to another domain via CDM, processed, then the response is routed back to the "DoMathResponse" function.
                    // This class is intended to replace the CDM call with as little modification to the existing code as possible, so I 
                    // can't simply return the answer variable.

                    pClass.DoMathResponse(answer); //<-- I want to do something like this
                };
            }

            $(document).ready(function(){

                var cClass = new ChildClass();
                cClass.X = 8;
                cClass.Y = 5;


                var DoMathRequest = function(){

                    cClass.DoMath();
                };

                var DoMathResponse = function(answer){

                    alert(answer);
                };


                // Button Click Event Handler
                $("#btn").click(function(){DoMathRequest();});

            });

        </script>
    </head>

    <body>
        <div id="btn">Click Me</div>
    </body>
</html>

这可以用JavaScript吗？现有代码使用CDM调用另一个域，我试图用类替换跨域调用。我希望尽可能少地修改原始代码来实现这一目标。我完全控制了ChildClass，但其他人使用现有代码，所以我想调用跨域消息路由到的相同功能。这样，我们只需要将CDM更改为我班级中的函数，然后从那里处理它。

任何帮助都将不胜感激。

Answer 1

如何将DoMathResponse作为回调函数传递

Eg）的

function ChildClass(){ 
        this.X; 
        this.Y; 

        this.DoMath = function(onComplete) { 
            var answer = this.X + this.Y;
            onComplete (answer); 
        }; 
} 

$(document).ready(function(){ 
        var cClass = new ChildClass(); 
        cClass.X = 8; 
        cClass.Y = 5; 

 var DoMathResponse = function(answer){ 
         alert(answer); 
 };

var DoMathRequest = function(){ 
        cClass.DoMath(DoMathResponse); 
};

Answer 2

而不是声明：

 cClass = new ChildClass();

你应该尝试：

var

这样就可以使变量在类/函数之外全局可用，而不是本地{{1}}声明的变量。

在主脚本中创建JavaScript类函数调用函数

2 个答案: