Mootools 类 - 在函数内调用函数

发布于 2025-01-03 06:28:40 字数 552 浏览 3 评论 0原文

我现在正在学习 Mootools 课程，有些东西我似乎无法理解或找到一个合适的例子。

基本上，我需要能够调用同一类的不同函数中的函数；下面的示例：

var Bob = new Class({

    initialize: function () {
        this.message = 'Hello';
    },

    someOther: function() {
        this.message2 = 'Bob';
    },

    getMessage: function() {
        return this.someOther();
    },

});

window.addEvent('domready', function() {    
    var map = new Bob;

    alert(map.getMessage());
});

从这段代码中，我本以为警报会生成已在函数“someOther”中设置的“Bob”，但它输出了一条未定义的消息。

谁能帮忙或指出我哪里出错了？

提前致谢，

原文

I'm learning Mootools classes at the moment and there's something that I can't seem to get my head around or find a decent example.

Basically, I need to be able to call a function within a different function of the same class; example below:

var Bob = new Class({

    initialize: function () {
        this.message = 'Hello';
    },

    someOther: function() {
        this.message2 = 'Bob';
    },

    getMessage: function() {
        return this.someOther();
    },

});

window.addEvent('domready', function() {    
    var map = new Bob;

    alert(map.getMessage());
});

From this code, I would have thought that the alert would produce 'Bob' which has been set in the function 'someOther' but it's outputting a undefined message.

Can anyone help or point out where I'm going wrong?

Thanks in advance,

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甜｀诱少女 2025-01-10 06:28:40

呃不完全是。

someOther 本身没有返回值，它是一个 setter。你调用它，它会将 this.message2 设置到类中，但它什么也不返回。当 getter 时，方法应该返回 this（实例，因此使其可链接）或一个值。

无论如何，你可以让它设置属性并返回它，如下所示：

var Bob = new Class({
    initialize: function() {
        this.message = 'Hello';
    },
    someOther: function() {
        return this.message2 = 'Bob'; //bad 
    },
    getMessage: function() {
        return this.someOther(); // why
    },
});
window.addEvent('domready', function() {
    var map = new Bob;
    alert(map.getMessage());
    alert(map.message2); // bob
});

不过，从语义上讲，你想要有 1 个 getter。 .getMessage 应该只是返回 this.message - 您可以编写一个不同的方法来调用 someOther 并返回它。

看看我前几天写的类上下文中的 getter/setter 模式：
http://fragged.org/using- overridesetter-overloadgetter-to-make-flexible-functions-in-mootools_1451.html

等，如需更多帮助，请查看keetology 博客或 davidwalsh.name - 或 mootorial - 有大量类使用和结构的示例。

这里列出了最关键的：https://stackoverflow.com/tags/mootools/info

er not quite.

someOther has no return value in itself, it's a setter. you invoke it and it will set this.message2 into the class but it returns nothing. methods should return this (the instance, so making it chainable) or a value, when a getter.

anyway, you can make it set the property and return it like so:

var Bob = new Class({
    initialize: function() {
        this.message = 'Hello';
    },
    someOther: function() {
        return this.message2 = 'Bob'; //bad 
    },
    getMessage: function() {
        return this.someOther(); // why
    },
});
window.addEvent('domready', function() {
    var map = new Bob;
    alert(map.getMessage());
    alert(map.message2); // bob
});

though, semantically, you want to have 1 getter. .getMessage should just return this.message - you can write a different method that calls someOther and returns it.

have a look at this pattern for a getter/setter in a class context I wrote the other day:
http://fragged.org/using-overloadsetter-overloadgetter-to-make-flexible-functions-in-mootools_1451.html

etc etc. for more help, look at the keetology blogs or davidwalsh.name - or the mootorial - plenty of examples of class use and structure.

most key ones are listed here: https://stackoverflow.com/tags/mootools/info

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