Input.inputString

説明

現フレームでキーボードで入力された文字を返します（読み取り専用）

ASCII 文字のみが inputString に含まれます。

The string can contain two special characters which should be handled: Character "\b" represents backspace.
Character "\n" represents return or enter.

using UnityEngine;
using System.Collections;

public class ExampleScript : MonoBehaviour
{
    public GUIText  gt;

    void Start()
    {
        gt = GetComponent<GUIText>();
    }

    void Update()
    {
        foreach (char c in Input.inputString)
        {
            if (c == '\b') // has backspace/delete been pressed?
            {
                if (gt.text.Length != 0)
                {
                    gt.text = gt.text.Substring(0, gt.text.Length - 1);
                }
            }
            else if ((c == '\n') || (c == '\r')) // enter/return
            {
                print("User entered their name: " + gt.text);
            }
            else
            {
                gt.text += c;
            }
        }
    }
}