Unity C#中无法实例化Room类对象的问题排查

我有一个Unity C#脚本用于生成房间网格，房间由Room类定义并放在同名脚本中。当尝试为房间网格创建新的Room对象时，出现编译器错误：

'Room' 不包含接受3个参数的构造函数

同时还引发了更多连锁错误，提示Room不包含方法定义且找不到可访问的扩展方法。

Room类代码 #

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System.Drawing;

public class Room {
        private Point coords;
        private string referenceName;
        private GameObject roomGO;
        private Room north, east, south, west;

        private int layer;

        public Room(string theReferenceName, Point theCoords, int theLayer) {
            referenceName = theReferenceName;
            coords = theCoords;
            layer = theLayer;
        }

        // 返回指定方向的相邻房间，无相邻则返回null
        public Room getNeighbor(string theNeighbor) {
            switch (theNeighbor) {
                case "north" : 
                    if (north is not null) {
                        return north; 
                    }
                    break;
                case "east" : 
                    if (east is not null) {
                        return east; 
                    }
                    break;
                case "south" : 
                    if (south is not null) {
                        return south; 
                    }
                    break;
                case "west" : 
                    if (west is not null) {
                        return west; 
                    }
                    break;
            }
            return null;
        }

        public void setNeighbor(string theDirection, Room theNewNeighbor) {
            switch (theDirection) {
                case "north" : 
                    north = theNewNeighbor;
                    break;
                case "east" : 
                    east = theNewNeighbor;
                    break;
                case "south" :
                    south = theNewNeighbor;
                    break;
                case "west" : 
                    west = theNewNeighbor;
                    break;
            }
        }

        public void setRoomGO (GameObject theRoomGO) {
            if (theRoomGO != null) {
                roomGO = theRoomGO;
            }
        }

        public string getReferenceName() {
            return referenceName;
        }

        public void setReferenceName(string theNewReferenceName) {
            referenceName = theNewReferenceName;
        }

        public Point getCoords() {
            return coords;
        }

        public int getLayer() {
            return layer;
        }

        public void setLayer(int theNewLayer) {
            layer = theNewLayer;
        }
    }

创建Room对象的代码 #

for (int i = 0; i < Rows; i++) {
    for (int j = 0; j < Columns; j++) {
        dungeon[i, j] = new Room(" ", new Point(i, j), 0);
    }
}

问题原因与解决方案 #

核心原因 #

你引入了System.Drawing命名空间，这个命名空间属于Windows桌面应用的GDI+库，Unity运行时环境不支持该库；同时该命名空间内的Point类与你代码中使用的坐标类型产生了命名冲突，导致编译器无法正确匹配Room的3参数构造函数，进而引发后续的方法定义找不到等连锁错误。

解决方案 #

方案1：改用Unity自带的整数坐标类型Vector2Int

1. 移除using System.Drawing;引用，修改Room类中与坐标相关的代码：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Room {
        private Vector2Int coords; // 替换为Vector2Int
        private string referenceName;
        private GameObject roomGO;
        private Room north, east, south, west;

        private int layer;

        // 修改构造函数的参数类型
        public Room(string theReferenceName, Vector2Int theCoords, int theLayer) {
            referenceName = theReferenceName;
            coords = theCoords;
            layer = theLayer;
        }

        // 修改getCoords的返回类型
        public Vector2Int getCoords() {
            return coords;
        }

        // 其余方法代码保持不变
    }

2. 修改创建Room对象的代码：

for (int i = 0; i < Rows; i++) {
    for (int j = 0; j < Columns; j++) {
        dungeon[i, j] = new Room(" ", new Vector2Int(i, j), 0);
    }
}

方案2：自定义Point类

如果需要保留Point的命名，可以自己实现一个简单的整数坐标类，避免与System.Drawing的Point冲突：

1. 移除using System.Drawing;引用，添加自定义Point类：

public class Point {
    public int X { get; set; }
    public int Y { get; set; }

    public Point(int x, int y) {
        X = x;
        Y = y;
    }
}

2. 保持Room类和创建对象的代码不变即可，此时编译器会使用你自定义的Point类。

额外检查

确保Room类的访问修饰符是public，且创建对象的脚本与Room类在同一个命名空间下，或者已通过using语句正确引用。

内容的提问来源于stack exchange，提问作者NVM99