Javascript:如何从类的一个函数中的一个函数访问类属性 [英] Javascript: How to access a class attribute from a function within one of the class's functions

问题描述

在类的某个特定功能内，我需要使用setInterval来中断代码的执行.但是，在setInterval函数中，"this"不再引用类"myObject".如何从setInterval函数中访问变量名称"?

Within my a certain function of a class, I need to use setInterval to break up the execution of the code. However, within the setInterval function, "this" no longer refers to the class "myObject." How can I access the variable "name" from within the setInterval function?

function myObject() {
    this.name = "the name";
}

myObject.prototype.getName = function() {
    return this.name;
}

myObject.prototype.test = function() {
    // this works
    alert(this.name);

    var intervalId = setInterval(function() {
        // this does not work
        alert(this.name);

        clearInterval(intervalId);
    },0);
}

推荐答案

myObject.prototype.test = function() {
    // this works
    alert(this.name);
    var oThis = this;
    var intervalId = setInterval(function() {
        // this does not work
        alert(oThis.name);

        clearInterval(intervalId);
    },0);
}

这应该有效.匿名函数的"this"与myObject的"this"不同.

This should work. The anonymous function's "this" is not the same "this" as your myObject's "this."

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