javascript - 从嵌套函数访问类成员

Question

我在 javascript 中有这个类

var MyGird = Class.extend({
  classMemeber1 : "Some Value"
  ,clickEvent : function(){
        this.editor.on({
            afteredit: function() {
                //
                //  HOW TO I ACCESS classMemeber1 from here? ?
                //
                //
            }
        })
})

我如何从 afteredit 内部访问 classMemeber1...
谢谢

Answer 1

您需要通过将 this ^[1] 存储在变量中来保存对调用 clickEvent 函数的对象的引用。由于闭包，它将在 afteredit 方法中可用。

var MyGird = Class.extend({
    classMemeber1: "Some Value",
    clickEvent: function () {
        var self = this; // save object reference
        this.editor.on({
            afteredit: function () {
                // access classMemeber1 from here
                // by using the stored reference
                alert(self.classMemeber1);
            }
        });
    },
    // ...
});

^{[1] this operator in javascript (注意:'this' 不是运算符)}