unityc#中的錯誤：錯誤CS0721：“隨機”：靜態型別不能用作引數

我在 Internet 上找到了一個類似于 Python 的代碼 random.choices()：

static class RandomUtils
{
    public static string Choice(this Random rnd, IEnumerable<string> choices, IEnumerable<int> weights)
    {
        var cumulativeWeight = new List<int>();
        int last = 0;
        foreach (var cur in weights)
        {
            last  = cur;
            cumulativeWeight.Add(last);
        }
        int choice = rnd.Next(last);
        int i = 0;
        foreach (var cur in choices)
        {
            if (choice < cumulativeWeight[i])
            {
                return cur;
            }
            i  ;
        }
        return null;
    }
}

添加到我的代碼中：

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

public class GroundTile : MonoBehaviour
{
    GroundSpawner groundSpawner;
    public GameObject player;

    private bool doDoubleSpawn;
    private int chanceForDoubleSpawn = 45;

    void Start()
    {   
        groundSpawner = GameObject.FindObjectOfType<GroundSpawner>();
        player = GameObject.Find("Tractor");
        SpawnObstacle();
        chanceForDoubleSpawn = GroundSpawner.levelObstaclesMultiplier;
    }

    // Spawn weight values for obstacles
    private int boxWeightValue = 40;
    private int antitankWeightValue = 40;
    private int barricadeWeightValue = 40;
    private int wheelsWeightValue = 40;
    private int molotovItemWeightValue = 5;

    // Prefabs
    public GameObject obstaclePrefab;

    public GameObject boxPrefab;
    public GameObject antitankPrefab;
    public GameObject barricadePrefab;
    public GameObject wheelsPrefab;

    public GameObject tankLevel1Prefab;
    public GameObject molotovItemPrefab;

    // Destroy if player too far away
    void Update()
    {
        if(transform.position.z < player.transform.position.z - 30)
        {
            Destroy(gameObject);
        }
    }
}

static class RandomUtils
{
    public static string Choice(this Random rnd, IEnumerable<string> choices, IEnumerable<int> weights)
    {
        var cumulativeWeight = new List<int>();
        int last = 0;
        foreach (var cur in weights)
        {
            last  = cur;
            cumulativeWeight.Add(last);
        }
        int choice = rnd.Next(last);
        int i = 0;
        foreach (var cur in choices)
        {
            if (choice < cumulativeWeight[i])
            {
                return cur;
            }
            i  ;
        }
        return null;
    }
}

但這給了我一個錯誤：

Assets\Scripts\GroundGenerator\GroundTile.cs(61,30): 錯誤 CS0721: 'Random': 靜態型別不能用作引數

我該如何解決？也許還有另一種方法來撰寫這個函式？

UPD：實體化 GroundTile 的代碼：

using UnityEngine;

public class GroundSpawner : MonoBehaviour
{   
    public GameObject groundTile;
    public GameObject groundTileEnd;
    public GameObject player;

    Vector3 nextSpawnPoint;
    private int numOfTiles = 10;
    private int plusTiles = 5;
    private int count = 0;
    public static int level = 1;

    public static int levelObstaclesMultiplier = 45;

    // Weight values for tanks and items
    public static int tankWeightValue = 100;
    public static int molotovItemWeightValue = 10;
    public static int molotovItemWeightValuePlus = 3;


    public void SpawnTile()
    {
        GameObject temp = Instantiate(groundTile, nextSpawnPoint, Quaternion.identity);
        nextSpawnPoint = temp.transform.GetChild(1).transform.position;
    }

    public void SpawnEndTile()
    {
        GameObject temp = Instantiate(groundTileEnd, nextSpawnPoint, Quaternion.identity);
        nextSpawnPoint = temp.transform.GetChild(1).transform.position;
    }

    void Start()
    {
        for (int i = 0; i < 10; i  )
        {
            SpawnTile();
        }

        SpawnEndTile();


        InvokeRepeating("Spawn", 1.5f, 1.5f);
    }

    public void Spawn()
    {
        if (Time.timeScale != 0 && PlayerController.forwardSpeed != 0)
        {
            if (count != numOfTiles)
            {
                SpawnTile();
                count  = 1;
            }
            else
            {
                SpawnEndTile();
                numOfTiles  = plusTiles;
                count = 0;
                if (levelObstaclesMultiplier <= 65)
                {
                    levelObstaclesMultiplier  = 1;
                }
            }   
        }
    }
}

uj5u.com熱心網友回復：

這段代碼似乎是為 C#System.Random而不是 Unity 特定的UnityEngine.Random類撰寫的。System.Random您可以通過在引數中指定來解決錯誤：

public static string Choice(this System.Random rnd, IEnumerable<string> choices, IEnumerable<int> weights)

uj5u.com熱心網友回復：

在引數上，只需將“Random”替換為“System.Random”，錯誤是因為它認為您使用的是UnityEngine.Random，這是一個靜態型別。

public static string Choice(this System.Random rnd, IEnumerable<string> choices, IEnumerable<int> weights)

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