using System.Collections.Generic;
using UnityEngine;
/// <summary>
/// 随机数管理类
/// </summary>
public class RandomHelper
{
/// <summary>
/// 生成指定位数的随机码（数字）
/// </summary>
/// <param name="length">生成数字的长度</param>
/// <param name="min"></param>
/// <param name="max"></param>
/// <returns></returns>
public static string GenerateRandomCode(int length, int min, int max)
{
var result = new System.Text.StringBuilder();
for (var i = 0; i < length; i++)
{
var random = new System.Random(System.Guid.NewGuid().GetHashCode());
result.Append(random.Next(min, max));
}
return result.ToString();
}
/// <summary>
/// 生成指定个数的不重复随机数列表
/// </summary>
/// <param name="length">列表的长度[不得大于min和max之间随机数的总个数]</param>
/// <param name="min"></param>
/// <param name="max"></param>
/// <returns></returns>
public static List<int> GenerateRandomList(int length, int min, int max)
{
List<int> randomList = new List<int>();
if (length <= (max - min))
{
for (var i = 0; i < length; i++)
{
int random = Random.Range(min, max);
if (randomList.Contains(random))
{
i--;
continue;
}
else
{
randomList.Add(random);
}
}
}
return randomList;
}
/// <summary>
/// 索引法随机
/// </summary>
/// <param name="minValue"></param>
/// <param name="maxValue"></param>
/// <returns></returns>
public static int[] GetIndexRandomNum(int minValue, int maxValue)
{
System.Random random = new System.Random();
int sum = Mathf.Abs(maxValue - minValue);//计算数组范围
int site = sum;//设置索引范围
int[] index = new int[sum];
int[] result = new int[sum];
int temp = 0;
for (int i = minValue; i < maxValue; i++)
{
index[temp] = i;
temp++;
}
for (int i = 0; i < sum; i++)
{
int id = random.Next(0, site - 1);
result[i] = index[id];
index[id] = index[site - 1];//因id随机到的数已经获取到了，用最后的一个数来替换它
site--;//缩小索引范围
}
return result;
}
}
随机生成不重复的几个数（Unity）的相关教程结束。
