unity 按键键值检测。

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

public class KeyCodeTest : MonoBehaviour {


    public Text t;
    public KeyCode currentKey;
    public Event e;
    // Update is called once per frame
    void Update()
    {
        //ONGUI里面检测不到shift ctrl的按下，虽然不知道为什么，但是可以在update里面单独检测其输出
        if(Input.GetKeyDown(KeyCode.LeftShift))
        {
            Debug.LogError("Update,LeftShift");
        }
        else if(Input.GetKeyDown(KeyCode.RightShift))
        {
            Debug.LogError("Update,RightShift");
        }
    }
    void OnGUI()
    {
        if(Input.anyKeyDown)
        {
            e = Event.current;
            if(e.isKey)
            {
                currentKey = e.keyCode;
                Debug.Log("Current Key is : " + currentKey.ToString());
                Debug.Log("Current Key is : " + (int)currentKey);
            }
        }
        //循环遍历输出
        //if(Input.anyKeyDown)
        //{
        //    foreach(KeyCode keyCode in Enum.GetValues(typeof(KeyCode)))
        //    {
        //        if(Input.GetKeyDown(keyCode))
        //        {
        //            Debug.LogError("sssss  Current Key is : " + keyCode.ToString());
        //            Debug.LogError("sssss  Current Key is : " + (int)keyCode);
        //        }
        //    }
        //}
    }

}