在 JavaScript 中添加私有方法？

Question

我正在尝试制作一款基础游戏来增强我的 JavaScript 知识。但是我需要一些帮助来尝试向对象添加私有方法。这样做的原因是我希望用户能够在达到特定条件后访问某些移动，但不能在此之前访问。我也不想每次角色升级时都必须添加方法。这是一些代码：

function Character(name, type, sex) {
    this.name = name;
    this.type = type;
    this.sex = sex;
    //Ignore this part as well this.punch = function() {
        //Ignore this. Will work on later
    }
};

var rock = new Character('Stoner', 'Rock', 'Male');

Answer 1

如果您使用 "var" 而不是 this.punch，它将变为私有。

 function Character(name, type, sex) {
        this.name = name;
        this.type = type;
        this.sex = sex;
        var punch = function() {
            //Ignore this. Will work on later
        }

    };

    var rock = new Character('Stoner', 'Rock', 'Male');

Answer 2

这完全是猜测，但这是我根据看起来 的想法得出的意见。暂时想不出别的办法。

function Character(name, type, sex) {
    var level = 1;
    this.name = name;
    this.type = type;
    this.sex = sex;
    this.punch = function() {
        // If the user isn't over level 5, don't punch anything
        if (level < 5) {
            return;
        }
        // Punch something
    }
}

显然你需要一些升级角色的方法...

Answer 3

I don't think this is what the OP is looking for... It seems like the OP wants them "private" until the user hits a certain level and then public

假设这个评论是正确的...

不需要是私有方法，可以是public方法，如果不够用if/else语句处理"levels" .

function Character(name, type, sex) {
  this.name = name;
  this.type = type;
  this.sex = sex;

  this.level = 10;

  this.punch = (function(){
    if (this.level > 5) {
      /* Punch functionality goes here. */
    } else {
      /* They don't have enough levels, tell them that! */
    }
  }).bind(this)
}

我只是假设您使用的是关卡。如果你有其他系统，你可以简单地适应它。

在 JavaScript 中添加私有方法？

Add private method in JavaScript?

javascript

methods

private