javascript - 在函数内设置定时器

Question

我有一个游戏对象，我想在一定时间后重新生成（变得活跃）。每次时间到了，我都会收到这个错误：

Uncaught TypeError: Object [object global] has no method 'SpawnCounter'

不知道我做错了什么？这是我的对象的一部分：

this.Update = function(){
    //Collisions
    if(this.active){
        if(player.Intersects(this)){
            console.debug("Player Touching Pick Up!");
            if(this.type == "weapon")
                player.weapon = this.subtype;
            this.active = false;
        }
    }
    else{
        //THIS IS THE TIMER
        setTimeout( function(){ this.SpawnCounter(); }, 2000 );
    }
};

this.SpawnCounter = function(){
    this.active = true;
};

所有这一切，只是一个游戏拾取 - 2秒后重新出现。

Answer 1

也许尝试将其范围限定为另一个变量...

this.Update = function(){
    var that = this;
    //Collisions
    if(this.active){
        if(player.Intersects(this)){
            console.debug("Player Touching Pick Up!");
            if(this.type == "weapon")
                player.weapon = this.subtype;
            this.active = false;
        }
    } else{
        //THIS IS THE TIMER
        setTimeout( function(){ that.SpawnCounter(); }, 2000 );
    }
};

this.SpawnCounter = function(){
    this.active = true;
};