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一、前言

最近在学习unity2D，想做一个横版过关游戏，需要按键设置功能，让用户可以自定义方向键与攻击键等。

自己写了一个，总结如下。

二、界面效果图

这个是一个csv文件，准备第一列是中文按键说明，第二列是英文，第三列是日文（还没有翻译）；第四列是默认按键名称，第五列是默认按键ascII码（如果用户选了恢复默认设置，就会用到）；第六列是用户自己设置的按键名称，第七列是用户自己设置的按键ascII码；第八列保留，暂未使用。

这个是首页，如果选到了这个按钮，就是按键设置页面。

这个是按键设置页面，实现了按 上下/用户设置的上下移动光标，按回车/ 开始键确定，然后按另一个键进行按键修改。
（图中灰色块就是光标，还没有找图片；最后3行按钮进行了特殊处理）

三、主要部分代码

unity代码比较多，总结下主要用到的3个类。

1.FileManager.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System.IO;
using UnityEngine.SceneManagement;
using System.Text;public class FileManager : MonoSingleTon<FileManager>
{private bool isInit =false;public TextAsset keyConfigCsv;//012列是语言，3是默认名称，4是默认ascii，56是用户设置的//这个要装第二行的数据/*wsadjkliqeuocvjk*///语言，这个不能修改，只能读取public static string[] LanguageWasd = new string[16];private static string[] LanguageWasd0 = new string[16];private static string[] LanguageWasd1 = new string[16];private static string[] LanguageWasd2 = new string[16];//默认的key的str与int，这个不能修改，只能读取public static int[] DefaultWasdNumKeys = new int[16];public static string[] DefaultWasdNumKeysStr = new string[16];//实际用的key的str与intpublic static int[] WasdNumKeys = new int[16];public static string[] WasdNumKeysStr = new string[16];//临时用的key的str与int，因为可能只修改不保存，所以用public static int[] WasdNumKeysTemp = new int[16];public static string[] WasdNumKeysStrTemp = new string[16];// Start is called before the first frame update// 这个方法会在脚本被启用时注册监听事件void OnEnable(){//Debug.Log("进入这个场景playerData");//Debug.Log("执行完毕这个场景playerData");}private void Awake(){if (!isInit){InitKeyConfig();}}void Start(){}// Update is called once per framevoid Update(){}private bool InitKeyConfig(){string path = GetKeyConfigPath();Debug.Log(path);if (File.Exists(path)){//用用户的初始化LoadKeyConfig(File.ReadAllText(path).Split("\n"));Debug.Log("使用用户的初始化");isInit = true;return false;}else{string text = keyConfigCsv.text;//把默认的文件写进本地File.WriteAllText(path, text, Encoding.UTF8);//用默认的初始化LoadKeyConfig(text.Split("\n"));//string[] dataRow = text.Split("\n");//File.WriteAllLines(path, dataRow);Debug.Log("使用默认的初始化");isInit = true;return true;}}//读取到临时变量里public void LoadKeyConfig(string[] dataRow){int language = LanguageManager.GetLanguage();//File.WriteAllLines(path, dataRow);for(int i = 0; i < dataRow.Length; i++){string[] dataCell = dataRow[i].Split(",");if (i >= 16){break;}else{LanguageWasd[i] = dataCell[language];LanguageWasd0[i] = dataCell[0];LanguageWasd1[i] = dataCell[1];LanguageWasd2[i] = dataCell[2];DefaultWasdNumKeysStr[i] = dataCell[3];DefaultWasdNumKeys[i] = int.Parse(dataCell[4]);WasdNumKeysStr[i] = dataCell[5];WasdNumKeysStrTemp[i] = dataCell[5];WasdNumKeys[i] = int.Parse(dataCell[6]);WasdNumKeysTemp[i] = int.Parse(dataCell[6]);}}}private static void SaveKeyConfig(string[] dataRow){//Application.dataPath//这个打包后就不能用了，可能没权限string path = GetKeyConfigPath();if (File.Exists(path)){//删了重新创建File.Delete(path);File.CreateText(path).Close();}else{File.CreateText(path).Close();}//List<string> datas2 = new List<string>();//datas.Add("coins,1");Debug.Log("写入数据");File.WriteAllLines(path, dataRow, Encoding.UTF8);Debug.Log("写入数据完毕");}public void ResetKeyConfig(){string text = keyConfigCsv.text;//用默认的初始化LoadKeyConfig(text.Split("\n"));//并且保存SaveKeyConfig(text.Split("\n"));//SceneManager.LoadScene(0);}public static string GetKeyConfigPath(){return Application.persistentDataPath + "/KeyConfig.csv";}public static void SaveKeyConfig(){string[] newData = new string[16];//保存文件for(int i=0; i<16; i++){newData[i] = LanguageWasd0[i] + "," + LanguageWasd1[i] + "," + LanguageWasd2[i] + ","+ DefaultWasdNumKeysStr[i] + "," + DefaultWasdNumKeys[i] + "," + WasdNumKeysStr[i] + "," + WasdNumKeys[i] + "," + ";";}SaveKeyConfig(newData);Debug.Log("保存键盘信息完毕");}}

这个类负责操作配置文件，要把内置的配置文件保存到本地配置文件中，以及读取配置文件。（要区分读取内置的还是本地的）

2.TitleScreen.cs

using System;
using System.Collections;
using System.Collections.Generic;
using TMPro;
using UnityEngine;
using UnityEngine.UI;public class TitleScreen : MonoBehaviour
{TextMeshProUGUI tmpTitleText;bool calledNextScene;bool inputDetected = false;bool isTitle = true;bool isKeySetting = false;bool isLanguageSetting = false;int alphaKeyPressText = 255;bool alphaKeyPressTextShow = true;public AudioClip keyPressClip;public AudioClip keyChangeClip;[SerializeField] Image[] buttons = new Image[5];[SerializeField] Text[] buttonsText = new Text[5];private int buttonsChoosedNum = 0;private enum TitleScreenStates { WaitForInput, NextScene };TitleScreenStates titleScreenState = TitleScreenStates.WaitForInput;#if UNITY_STANDALONEstring insertKeyPressText = "PRESS ANY KEY";
#endif#if UNITY_ANDROID || UNITY_IOSstring insertKeyPressText = "TAP TO START";
#endifstring titleText =
@"<size=18><color=#ffffff{0:X2}>{1}</color></size>";private void Awake(){//tmpTitleText = GameObject.Find("TitleText").GetComponent<TextMeshProUGUI>();}// Start is called before the first frame updatevoid Start(){//tmpTitleText.alignment = TextAlignmentOptions.Center;//tmpTitleText.alignment = TextAlignmentOptions.Midline;//tmpTitleText.fontStyle = FontStyles.UpperCase;titleScreenState = TitleScreenStates.WaitForInput;if (isHaveSavePoint()){initButton(1);}else {initButton(0);}}// Update is called once per framevoid Update(){switch(titleScreenState){case TitleScreenStates.WaitForInput://buttonsText[buttonsChoosedNum].text = String.Format(titleText, alphaKeyPressText, buttonsText[buttonsChoosedNum].text);buttonsText[buttonsChoosedNum].enabled = alphaKeyPressTextShow;if (!inputDetected){ChooseButton();SelectButton();}break;case TitleScreenStates.NextScene:if (!calledNextScene){GameManager.Instance.StartNextScene();calledNextScene = true;}break;}}private IEnumerator FlashTitleText() { for(int i = 0; i < 5; i++){alphaKeyPressTextShow = true;alphaKeyPressText = 0;yield return new WaitForSeconds(0.1f);alphaKeyPressTextShow = false;alphaKeyPressText = 255;yield return new WaitForSeconds(0.1f);}alphaKeyPressTextShow = true;alphaKeyPressText = 0;yield return new WaitForSeconds(0.1f);titleScreenState = TitleScreenStates.NextScene;}private IEnumerator FlashTitleTextAndOpenKeyConfig(){for (int i = 0; i < 5; i++){alphaKeyPressTextShow = true;alphaKeyPressText = 0;yield return new WaitForSeconds(0.1f);alphaKeyPressTextShow = false;alphaKeyPressText = 255;yield return new WaitForSeconds(0.1f);}alphaKeyPressTextShow = true;alphaKeyPressText = 0;yield return new WaitForSeconds(0.1f);//退出的时候，需要改为接受输入KeyConfigScript.Instance.Show(() => { inputDetected = false;Debug.Log("回调方法"); });}private bool isHaveSavePoint() {return false;}private void ChooseButton() {if (  Input.GetKeyDown(KeyCode.UpArrow) || Input.GetKeyDown((KeyCode)FileManager.WasdNumKeys[0])  ){if (buttonsChoosedNum > 0){buttons[buttonsChoosedNum].enabled = false;buttonsChoosedNum--;buttons[buttonsChoosedNum].enabled = true;PlayChangeButton();}else{PlayChangeButton();}}if (Input.GetKeyDown(KeyCode.DownArrow) || Input.GetKeyDown((KeyCode)FileManager.WasdNumKeys[1]) ){if (buttonsChoosedNum < buttons.Length - 1){buttons[buttonsChoosedNum].enabled = false;buttonsChoosedNum++;buttons[buttonsChoosedNum].enabled = true;PlayChangeButton();}else{PlayChangeButton();}}}private void SelectButton() { if( Input.GetKeyDown(KeyCode.Return) || Input.GetKeyDown((KeyCode)FileManager.WasdNumKeys[13])  ){if (buttonsChoosedNum == 0){inputDetected = true;StartCoroutine(FlashTitleText());SoundManager.Instance.Play(keyPressClip);} else if (buttonsChoosedNum == 1) {inputDetected = true;SoundManager.Instance.Play(keyPressClip);}else if (buttonsChoosedNum == 2){inputDetected = true;SoundManager.Instance.Play(keyPressClip);}else if (buttonsChoosedNum == 3){inputDetected = true;SoundManager.Instance.Play(keyPressClip);StartCoroutine(FlashTitleTextAndOpenKeyConfig());}else if (buttonsChoosedNum == 4){Application.Quit();}}}private void PlayChangeButton() { if(keyChangeClip != null){SoundManager.Instance.Play(keyChangeClip);}}private void initButton(int n) {buttonsChoosedNum = n;for(int i = 0; i < buttons.Length; i++){if (i == n){buttons[i].enabled = true;}else {buttons[i].enabled = false;}}}}

这个是游戏首页用的类，主要管是否显示按键设置页面；
按键设置页面也在首页，是个Canvas对象，刚开始会隐藏，选择按键设置按钮并确定后，才会展示。

3.KeyConfigScript.cs

using System;
using System.Collections;
using System.Collections.Generic;
using UnityEditor;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.UIElements;public class KeyConfigScript : MonoBehaviour
{bool flashText = false;public static KeyConfigScript Instance = null;[SerializeField] Canvas canvas;public AudioClip keyChangeClip;public AudioClip keySelectClip;/*wsadjkliqeuocvjk*/public UnityEngine.UI.Image[] buttons = new UnityEngine.UI.Image[19];[SerializeField] Text[] buttonsText = new Text[19];[SerializeField] ScrollRect scrollRect;private Action nowScreenAction;private int buttonsChoosedNum = 0;bool alphaKeyPressTextShow = true;//检测按键bool canInput = false;bool canMove = true;private void Awake(){// If there is not already an instance of SoundManager, set it to this.if (Instance == null){Instance = this;}//If an instance already exists, destroy whatever this object is to enforce the singleton.else if (Instance != this){Destroy(gameObject);}//Set SoundManager to DontDestroyOnLoad so that it won't be destroyed when reloading our scene.DontDestroyOnLoad(gameObject);//默认隐藏Close();}private void OnEnable(){}private void initKeysObjects() {//读取下当前配置文件，获得每个按键配置的名称和值for (int i = 0; i < buttons.Length; i++){if (i >= 16){buttons[i].enabled = false;}else{buttonsText[i].text = FileManager.LanguageWasd[i] + "：" + FileManager.WasdNumKeysStr[i];//初始化方法，只有0才是if (i == 0){buttons[i].enabled = true;}else{buttons[i].enabled = false;}}}}private void ChooseButton(){if ( Input.GetKeyDown(KeyCode.UpArrow) || Input.GetKeyDown((KeyCode)FileManager.WasdNumKeys[0]) ){if (buttonsChoosedNum > 0){buttons[buttonsChoosedNum].enabled = false;buttonsChoosedNum--;buttons[buttonsChoosedNum].enabled = true;PlayChangeButton();ScrollUpOrDown(buttonsChoosedNum, false);}else{//移动到最后一个buttons[buttonsChoosedNum].enabled = false;buttonsChoosedNum = buttons.Length - 1;buttons[buttonsChoosedNum].enabled = true;PlayChangeButton();}}if (Input.GetKeyDown(KeyCode.DownArrow) || Input.GetKeyDown((KeyCode)FileManager.WasdNumKeys[1]) ){if (buttonsChoosedNum < buttons.Length - 1){buttons[buttonsChoosedNum].enabled = false;buttonsChoosedNum++;buttons[buttonsChoosedNum].enabled = true;PlayChangeButton();ScrollUpOrDown(buttonsChoosedNum, true);}else{//移动到第一个buttons[buttonsChoosedNum].enabled = false;buttonsChoosedNum = 0;buttons[buttonsChoosedNum].enabled = true;PlayChangeButton();}}}private void SelectButton(){//如果是可以移动状态if (canMove){//如果按下选择键if (  Input.GetKeyDown(KeyCode.Return) || Input.GetKeyDown((KeyCode)FileManager.WasdNumKeys[13])  ) {//播放声音PlaySelectButton();//关闭移动canMove = false;//如果是这些键，特殊处理然后返回switch (buttonsChoosedNum){case 16:StartCoroutine(FlashTitleTextSecond(Reset));return;case 17:StartCoroutine(FlashTitleTextSecond(SaveAndClose));return;case 18:StartCoroutine(FlashTitleTextSecond(Close));return;}//如果是普通键//闪烁标志位打开flashText = true;//字幕闪烁StartCoroutine(FlashTitleText());}}else{BeforeSettingKey();}}private void BeforeSettingKey(){if (Input.anyKeyDown){//需要看这个键能不能设置bool canSetting = false;foreach (KeyCode key in System.Enum.GetValues(typeof(KeyCode))){if (Input.GetKeyDown(key)){// 检查按键是否为可打印字符if ((key >= KeyCode.A && key <= KeyCode.Z) || (key >= KeyCode.Alpha0 && key <= KeyCode.Alpha9)){// 将字符转换为 ASCII 码string keyStr = key.ToString();//char keyChar = keyStr[0];int asciiValue = (int)key;Debug.Log($"按下的键 {key} 对应的 ASCII 码值是：{asciiValue}");SettingKey(keyStr, asciiValue);canSetting = true;break;}else{// 非字母数字键（你可以根据需求处理这些按键）Debug.Log($"按下了非字符键：{key}");if (key == KeyCode.Space){SettingKey("Space", 32);canSetting = true;break;}else if (key == KeyCode.Return){SettingKey("Enter", 13);canSetting = true;break;}else if (key == KeyCode.UpArrow){SettingKey("Up", 273);canSetting = true;break;}else if (key == KeyCode.DownArrow){SettingKey("Down", 274);canSetting = true;break;}else if (key == KeyCode.LeftArrow){SettingKey("Left", 276);canSetting = true;break;}else if (key == KeyCode.RightArrow){SettingKey("Right", 275);canSetting = true;break;}}}}//如果可以设置，再进行后续操作if (canSetting){//停止闪烁StartCoroutine(ResetTitleText());}}}private void SettingKey(string str, int ascII){//更新设置的信息FileManager.WasdNumKeysStrTemp[buttonsChoosedNum] = str;FileManager.WasdNumKeysTemp[buttonsChoosedNum] = ascII;//更新按键文本信息buttonsText[buttonsChoosedNum].text = FileManager.LanguageWasd[buttonsChoosedNum] + "："+ str;}private IEnumerator FlashTitleText(){while (flashText) { alphaKeyPressTextShow = true;yield return new WaitForSeconds(0.1f);alphaKeyPressTextShow = false;yield return new WaitForSeconds(0.1f);}}private IEnumerator FlashTitleTextSecond(Func<bool> func){for (int i=0; i<5; i++){alphaKeyPressTextShow = true;yield return new WaitForSeconds(0.1f);alphaKeyPressTextShow = false;yield return new WaitForSeconds(0.1f);}alphaKeyPressTextShow = true;yield return new WaitForSeconds(0.1f);//闪烁完毕后才能移动canMove = true;//闪烁完毕后执行func();}private IEnumerator ResetTitleText(){flashText = false;yield return new WaitForSeconds(0.2f);alphaKeyPressTextShow = true;buttonsText[buttonsChoosedNum].enabled = true;canMove = true;}private void PlayChangeButton(){if (keyChangeClip != null){SoundManager.Instance.Play(keyChangeClip);}}private void PlaySelectButton(){if (keySelectClip != null){SoundManager.Instance.Play(keySelectClip);}}//先从配置文件读取配置信息void Start(){}// Update is called once per framevoid Update(){if (canInput){buttonsText[buttonsChoosedNum].enabled = alphaKeyPressTextShow;if (canMove){ChooseButton();}SelectButton();}}//翻页，现在不用private void ScrollUpOrDown(int count, bool isDown){/*if(count == 8 && isDown){scrollRect.normalizedPosition = new Vector2(0, 0);}else if (count == 7 && !isDown) {scrollRect.normalizedPosition = new Vector2(0, 1);}*/}public void Show(Action action) {//翻页，现在不用//scrollRect.normalizedPosition = new Vector2(0, 0);alphaKeyPressTextShow = true;buttonsChoosedNum = 0;initKeysObjects();this.nowScreenAction = action;Debug.Log("show Key Config");canvas.enabled = true;canInput = true;}private bool Reset(){for (int i = 0; i < 16; i++){//先把text内容改了buttonsText[i].text = FileManager.LanguageWasd[i] + "：" + FileManager.DefaultWasdNumKeysStr[i];//然后把临时数组改了FileManager.WasdNumKeysStrTemp[i] = FileManager.DefaultWasdNumKeysStr[i];FileManager.WasdNumKeysTemp[i] = FileManager.DefaultWasdNumKeys[i];}return true;}private bool Save(){for (int i = 0; i < 16; i++){//给实际用的赋值FileManager.WasdNumKeysStr[i] = FileManager.WasdNumKeysStrTemp[i];FileManager.WasdNumKeys[i] = FileManager.WasdNumKeysTemp[i];}//写入文件FileManager.SaveKeyConfig();return true;}private bool SaveAndClose(){Save();Close();return true;}public bool Close() {canvas.enabled = false;canInput = false;//上一个屏幕，改为接受输入if(nowScreenAction != null){nowScreenAction();}return true;//nowScreenManager.GetComponent<TitleScreen>().inputDetected = false;}}

这个类就是按键设置页面用的类，有光标上下移动功能、按钮选择后让字幕闪烁的功能、再次按键后设置新按键功能。

四、备注

unity代码比较复杂，直接复制粘贴是无法使用的，每人的场景元素也不一样，很多变量会不存在，仅供参考。

以上就是个人编写的设置按键的代码，大致逻辑如下：

1.游戏启动后，先判断有没有本地配置文件，如果有、就读取本地配置文件并初始化；如果没有，就用内置配置文件初始化，并把内置配置文件保存到本地。

2.进入按键选择页面时，上下方向键移动光标，按回车可以选择按键，此时按键闪烁，再按另一个键可以设置为新按键。

3.有恢复默认设置功能，有保存并退出功能，有直接退出功能；如果选保存并退出，才把设置的临时按键数组赋值到实际使用的按键数组，并保存到本地配置文件。