UICalculagraph.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
/// <summary>
/// 计时器
/// </summary>
public class UICalculagraph : MonoBehaviour
{
    [SerializeField]
    private Text m_Text;
    [SerializeField]
    private bool m_PlayOnAwake = true;
    private int m_TotalSecond = 0;

    private void Awake()
    {
        if (m_PlayOnAwake)
            Play();
    }

    public void Play()
    {
        m_TotalSecond = 0;
        InvokeRepeating("Increase", 1, 1);
    }

    public void Stop()
    {
        CancelInvoke();
    }

    public void Show()
    {
        gameObject.SetActive(true);
    }

    public void Hide()
    {
        gameObject.SetActive(false);
    }

    private void Increase()
    {
        m_TotalSecond++;
        if (m_Text)
            m_Text.text = TimeFormat();
    }

    private string TimeFormat()
    {
        int SECOND_PER_HOUR = 3600; //1小时多少秒
        int SECOND_PER_MINUTE = 60; //1分钟多少秒
        int hour=0, minute=0, second=0;

        if (m_TotalSecond < 60)
        {
            second = m_TotalSecond % SECOND_PER_MINUTE;
        }
        else if (m_TotalSecond < SECOND_PER_HOUR)
        {
            minute = m_TotalSecond / SECOND_PER_MINUTE;
            second = m_TotalSecond % SECOND_PER_MINUTE;
        }
        else
        {
            hour = m_TotalSecond / SECOND_PER_HOUR;
            minute = (m_TotalSecond - hour * SECOND_PER_HOUR) / SECOND_PER_MINUTE;
            second = m_TotalSecond % SECOND_PER_MINUTE;
        }
        return string.Format("{0}:{1}:{2}", hour.ToString("D2"), minute.ToString("D2"), second.ToString("D2"));
    }
}

UIFlickerEffect.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
/// <summary>
/// 闪烁效果
/// </summary>
public class UIFlickerEffect : MonoBehaviour
{
    [SerializeField]
    private Image m_Image;
    [SerializeField]
    private float m_Frequency = 3;
    [SerializeField]
    private bool m_PlayOnAwake = true;
    private float m_Interval = 0;
    private bool m_SwitchBool = true;
    private bool m_Playing = false;
    private float t = 0;

    private void Awake()
    {
        if (m_PlayOnAwake)
            Play();
    }

    public void Play()
    {
        m_Interval = 1.0f / m_Frequency;
        t = 0;
        m_Playing = true;
    }

    public void Stop()
    {
        m_Playing = false;
    }

    public void Show()
    {
        gameObject.SetActive(true);
    }

    public void Hide()
    {
        gameObject.SetActive(false);
    }

    private void Update()
    {
        if (!m_Playing)
            return;

        t += Time.deltaTime;
        if (t < m_Interval)
            return;
        t = 0;

        m_Image.enabled = m_SwitchBool;
        m_SwitchBool = !m_SwitchBool;
    }
}

运行效果