JJBB/Assets/Project/Script/GUI/Base/UIButtonTime.cs

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

public class UIButtonTime : MonoBehaviour {

    public Button _Button;
    public Text _BtnText;
    private string _BtnOriginStr;

    void Awake()
    {
        _BtnOriginStr = _BtnText.text;
    }

    void OnEnable()
    {
        if (_StartTime > 0)
        {
            if (Time.time - _StartTime > _DisableTime)
            {
                _Button.interactable = true;
                _BtnText.text = _BtnOriginStr;
            }
            else
            {
                int startTime = (int)(_DisableTime - (Time.time - _StartTime) + 1);
                SetBtnDisableTime(startTime);
            }
        }
    }

	// Use this for initialization
	void Start ()
    {
        _BtnText.text = _BtnOriginStr;
    }

    void OnDisable()
    {
        StopAllCoroutines();
        _Button.interactable = true;
        _BtnText.text = _BtnOriginStr;
    }

    #region interact
    private int _disableCountdown;
    private float _StartTime;
    private float _DisableTime;

    public void SetBtnDisableTime(int disableTime)
    {
        _disableCountdown = disableTime;
        _Button.interactable = false;
        StartCoroutine(UpdateDisableTime());

        _StartTime = Time.time;
        _DisableTime = disableTime;
    }

    private IEnumerator UpdateDisableTime()
    {
        while (_disableCountdown > 0)
        {
            _BtnText.text = _BtnOriginStr + "(" + _disableCountdown + "s)";
            yield return new WaitForSeconds(1.0f);
            _disableCountdown--;
        }
        _Button.interactable = true;
        _BtnText.text = _BtnOriginStr;
    }
    #endregion
}