javascript - JS 中继承不起作用？

Question

谁能告诉我我做错了什么？

收到此错误:

    this.parent.Thing is not a function
this.parent.Thing(x,y); 

这是代码。

[Break On This Error] this.parent.Thing(x,y); 

//Thing class start
            function Thing(x, y){
                this.x = x;
                this.y = y;
            }

            Thing.prototype.setX = function(newX){
                this.x = newX;
            }

            Thing.prototype.setY = function(newY){
                this.y = newY;
            }

            Thing.prototype.getX = function(){
                return this.x;
            }

            Thing.prototype.getY = function(){
                return this.y;
            }
            //Thing class end


            //player start
            Player.prototype = new Thing(); 
            Player.prototype.constructor=Player;       // Otherwise instances of Cat would have a constructor of Mammal 
            Player.prototype.parent = Thing.prototype;

            function Player(x, y){ 
                this.parent.Thing(x,y);
            } 

            //player end


            var player = new Player(100,100);

Answer 1

尝试

this.parent.constructor.call(this,x,y);

您想要调用父级的构造函数，但将其应用于“this”对象。如果您不介意对关系进行硬编码，您也可以直接使用 Thing:

Thing.call(this,x,y)