ヽ｜∵｜ゝ(Fantom) の 開発blog？

using System;
using UnityEngine;

#if ENABLE_INPUT_SYSTEM
using UnityEngine.InputSystem;
#endif

public class AndroidBackKeyTest : MonoBehaviour
{

#if ENABLE_INPUT_SYSTEM

    public Key targetKey = Key.Escape;
    public KeyCode targetKeyCode = KeyCode.Escape;

    // Use this for initialization
    private void Start()
    {
        Debug.Log($"Platform : {Application.platform}");
        Debug.Log($"SystemInfo.operatingSystem : {SystemInfo.operatingSystem}");
    }

    bool keyPressing;
    bool keyCodePressing;
    float keyPassedTime;
    float keyCodePassedTime;

    // Update is called once per frame
    private void Update()
    {
        if (Keyboard.current[targetKey].wasPressedThisFrame)
        {
            keyPressing = true;
            keyPassedTime = Time.time;
            Debug.Log($"<color=cyan>[frame:{Time.frameCount}][passed:0.000] [{targetKey}].wasPressedThisFrame</color>");
        }

        if (Input.GetKeyDown(targetKeyCode))
        {
            keyCodePressing = true;
            keyCodePassedTime = Time.time;
            Debug.Log($"[<color=cyan>frame:{Time.frameCount}][passed:0.000] GetKeyDown({targetKeyCode})</color>");
        }

        if (keyPressing)
        {
            if (Keyboard.current[targetKey].isPressed)
            {
                Debug.Log($"[frame:{Time.frameCount}][passed:{(Time.time - keyPassedTime):F3}] [{targetKey}].isPressed");
            }

            if (Keyboard.current[targetKey].wasReleasedThisFrame)
            {
                Debug.Log($"<color=magenta>[frame:{Time.frameCount}][passed:{(Time.time - keyPassedTime):F3}] [{targetKey}].wasPressedThisFrame</color>");
                keyPressing = false;
            }
        }

        if (keyCodePressing)
        {
            if (Input.GetKey(targetKeyCode))
            {
                Debug.Log($"<color=#999999>[frame:{Time.frameCount}][passed:{(Time.time - keyCodePassedTime):F3}] GetKey({targetKeyCode})</color>");
            }

            if (Input.GetKeyUp(targetKeyCode))
            {
                Debug.Log($"<color=magenta>[frame:{Time.frameCount}][passed:{(Time.time - keyCodePassedTime):F3}] GetKeyUp({targetKeyCode})</color>");
                keyCodePressing = false;
            }
        }
    }

#endif

}

bool keyPressing;

private void Update()
{
    if (Keyboard.current[targetKey].wasPressedThisFrame)
    {
        keyPressing = true;
        //押したときの処理
    }

    if (keyPressing)
    {
        if (Keyboard.current[targetKey].wasReleasedThisFrame)
        {
            //離したときの処理
            keyPressing = false;
        }
        else
        {
            //継続中の処理
        }
    }
}

using UnityEngine;

#if ENABLE_INPUT_SYSTEM
using UnityEngine.InputSystem;
#endif

public class MouseWheelTest : MonoBehaviour
{
    private void Update()
    {
        var mouseAxis = Input.GetAxis("Mouse ScrollWheel");
        if (mouseAxis != 0)
        {
            Debug.Log($"[frame: {Time.frameCount}] Input.GetAxis(Mouse ScrollWheel) = {mouseAxis:F3}");
        }

        var mouseDelta = Input.mouseScrollDelta;
        if (mouseDelta != Vector2.zero)
        {
            Debug.Log($"[frame: {Time.frameCount}] Input.mouseScrollDelta = {mouseDelta.ToString("F3")}");
        }

#if ENABLE_INPUT_SYSTEM
        var mouseScroll = Mouse.current.scroll.ReadValue();
        if (mouseScroll != Vector2.zero)
        {
            Debug.Log($"[frame: {Time.frameCount}] Mouse.current.scroll = {mouseScroll.ToString("F3")}");
        }
#endif
    }
}

using UnityEngine;

#if ENABLE_INPUT_SYSTEM
using UnityEngine.InputSystem;
using UnityEngine.InputSystem.Controls;
#endif

public class KeyboardDisplayNameTest : MonoBehaviour
{
#if ENABLE_INPUT_SYSTEM
    private void Start()
    {
        KeyboardDisplayNameCheck();
    }

    void KeyboardDisplayNameCheck()
    {
        {
            var keyControlFromLayout = Keyboard.current.FindKeyOnCurrentKeyboardLayout("\\");
            Debug.Log("[\\] from keyboard layout : " + keyControlFromLayout.keyCode);
            var keyControlFromPath = (KeyControl)Keyboard.current["#(\\\\)"];
            Debug.Log("[\\] from control path : " + keyControlFromPath.keyCode);
        }
        {
            var keyControlFromLayout = Keyboard.current.FindKeyOnCurrentKeyboardLayout("^");
            Debug.Log("[^] from keyboard layout : " + keyControlFromLayout.keyCode);
            var keyControlFromPath = (KeyControl)Keyboard.current["#(^)"];
            Debug.Log("[^] from control path : " + keyControlFromPath.keyCode);
        }
        {
            var keyControlFromLayout = Keyboard.current.FindKeyOnCurrentKeyboardLayout("-");
            Debug.Log("[-] from keyboard layout : " + keyControlFromLayout.keyCode);
            var keyControlFromPath = (KeyControl)Keyboard.current["#(-)"];
            Debug.Log("[-] from control path : " + keyControlFromPath.keyCode);
        }
        {
            var keyControlFromLayout = Keyboard.current.FindKeyOnCurrentKeyboardLayout("@");
            Debug.Log("[@] from keyboard layout : " + keyControlFromLayout.keyCode);
            var keyControlFromPath = (KeyControl)Keyboard.current["#(@)"];
            Debug.Log("[@] from control path : " + keyControlFromPath.keyCode);
        }
        {
            var keyControlFromLayout = Keyboard.current.FindKeyOnCurrentKeyboardLayout("[");
            Debug.Log("[[] from keyboard layout : " + keyControlFromLayout.keyCode);
            var keyControlFromPath = (KeyControl)Keyboard.current["#([)"];
            Debug.Log("[[] from control path : " + keyControlFromPath.keyCode);
        }
        {
            var keyControlFromLayout = Keyboard.current.FindKeyOnCurrentKeyboardLayout("]");
            Debug.Log("[]] from keyboard layout : " + keyControlFromLayout.keyCode);
            var keyControlFromPath = (KeyControl)Keyboard.current["#(])"];
            Debug.Log("[]] from control path : " + keyControlFromPath.keyCode);
        }
        {
            var keyControlFromLayout = Keyboard.current.FindKeyOnCurrentKeyboardLayout(":");
            Debug.Log("[:] from keyboard layout : " + keyControlFromLayout.keyCode);
            var keyControlFromPath = (KeyControl)Keyboard.current["#(:)"];
            Debug.Log("[:] from control path : " + keyControlFromPath.keyCode);
        }
        {
            var keyControlFromLayout = Keyboard.current.FindKeyOnCurrentKeyboardLayout(";");
            Debug.Log("[;] from keyboard layout : " + keyControlFromLayout.keyCode);
            var keyControlFromPath = (KeyControl)Keyboard.current["#(;)"];
            Debug.Log("[;] from control path : " + keyControlFromPath.keyCode);
        }
        {
            var keyControlFromLayout = Keyboard.current.FindKeyOnCurrentKeyboardLayout(",");
            Debug.Log("[,] from keyboard layout : " + keyControlFromLayout.keyCode);
            var keyControlFromPath = (KeyControl)Keyboard.current["#(,)"];
            Debug.Log("[,] from control path : " + keyControlFromPath.keyCode);
        }
        {
            var keyControlFromLayout = Keyboard.current.FindKeyOnCurrentKeyboardLayout(".");
            Debug.Log("[.] from keyboard layout : " + keyControlFromLayout.keyCode);
            var keyControlFromPath = (KeyControl)Keyboard.current["#(.)"];
            Debug.Log("[.] from control path : " + keyControlFromPath.keyCode);
        }
        {
            var keyControlFromLayout = Keyboard.current.FindKeyOnCurrentKeyboardLayout("/");
            Debug.Log("[/] from keyboard layout : " + keyControlFromLayout.keyCode);
            var keyControlFromPath = (KeyControl)Keyboard.current["#(\\/)"];
            Debug.Log("[/] from control path : " + keyControlFromPath.keyCode);
        }
    }
#endif
}

using UnityEngine;

#if ENABLE_INPUT_SYSTEM
using UnityEngine.InputSystem;
using UnityEngine.InputSystem.Controls;
#endif

#if ENABLE_INPUT_SYSTEM
/// <summary>
/// displayName から Key (enum) を取得する.
/// ※失敗は None になる。None 自体は取得できない。
/// https://docs.unity3d.com/Packages/com.unity.inputsystem@1.0/manual/Controls.html#control-paths
/// http://fantom1x.blog130.fc2.com/blog-entry-370.html
/// </summary>
/// <param name="displayName">例: "a", "/", "\\" 等</param>
/// <returns></returns>
public static Key GetKeyFromDisplayName(string displayName)
{
    try
    {
        var control = Keyboard.current.FindKeyOnCurrentKeyboardLayout(displayName);
        return control.keyCode;
    }
    catch (Exception e)
    {
        #if UNITY_EDITOR
        Debug.LogError($"displayName = {displayName} : {e.Message}");
        #endif
    }
    return Key.None;  //失敗
}

/// <summary>
/// control path から Key (enum) を取得する.
/// ※失敗は None になる。None 自体は取得できない。
/// https://docs.unity3d.com/Packages/com.unity.inputsystem@1.0/manual/Controls.html#control-paths
/// http://fantom1x.blog130.fc2.com/blog-entry-370.html
/// </summary>
/// <param name="controlPath">例: "#(a)", "#(\\/)", "#(\\\\)" 等</param>
/// <returns>成功 = None 以外 / 失敗 = None</returns>
public static Key GetKeyFromControlPath(string controlPath)
{
    try
    {
        var control = (KeyControl)Keyboard.current[controlPath];
        return control.keyCode;
    }
    catch (Exception e)
    {
        #if UNITY_EDITOR
        Debug.LogError($"controlPath = {controlPath} : {e.Message}");
        #endif
    }
    return Key.None;  //失敗
}
#endif


//使い方
var backslashKey = GetKeyFromDisplayName("\\"); //OEM2
var aKey = GetKeyFromControlPath("#(a)"); //A

//Backslash を displayName で使う
((KeyControl)Keyboard.current["#(\\\\)"]).wasPressedThisFrame  //※要キャスト

//KeyboardLayout を利用
var keyControl = Keyboard.current.FindKeyOnCurrentKeyboardLayout("\\");
keyControl.wasPressedThisFrame  //押した瞬間

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

#if ENABLE_INPUT_SYSTEM
using UnityEngine.InputSystem;
#endif

public class InputSystemRelatimeKeyCheck : MonoBehaviour
{
#if ENABLE_INPUT_SYSTEM
    Key[] inputSystemKeys;

    //Keyboard.current[key] で以下はエラーが出るため、除外するリスト
    //ArgumentOutOfRangeException: Specified argument was out of the range of valid values.
    HashSet<Key> exceptKeys = new HashSet<Key>()
    {
        Key.None, Key.IMESelected,
    };

    private void Start()
    {
        inputSystemKeys = Enum.GetValues(typeof(Key))
                              .Cast<Key>()
                              .Where(e => !exceptKeys.Contains(e))  //exceptKeys にあるものは除く
                              .ToArray();
    }

    private void Update()
    {
        if (Keyboard.current.anyKey.wasPressedThisFrame)  //Input.anyKeyDown 相当
        {
            foreach (var key in inputSystemKeys)
            {
                if (Keyboard.current[key].wasPressedThisFrame)
                {
                    Debug.Log(key);
                    break;
                }
            }
        }
    }
#endif
}

Key[] inputSystemKeys = Enum.GetValues(typeof(Key)).Cast<Key>().Where(e => e != Key.None && e != Key.IMESelected).ToArray();

//Key(enum)型表記
Keyboard.current[Key.A].wasPressedThisFrame

//displayName (文字列型) → control path にして利用（※大文字小文字は区別しない）
((KeyControl)Keyboard.current["#(a)"]).wasPressedThisFrame  //※要: KeyControl にキャスト

//displayName (文字列型) を KeyboardLayout から検出
var keyControl = Keyboard.current.FindKeyOnCurrentKeyboardLayout("a");
keyControl.wasPressedThisFrame  //押した瞬間