1.实现double trigger
2.long press长按

紫色的部分（IsExteding）是要侦测用户是否按下第二次

1.double trigger:
新建MyTimer时间类：

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

public class MyTimer{
    /// <summary>
    /// 状态
    /// </summary>
    public enum STATE
    {
        IDLE,
        RUN,
        FINISHED
    }
    public STATE state;

    public float duration = 1.0f;           //要算多久 缺省1s后停止

    private float elapsedTime = 0;          //过去的时间 初始值是0

    public void Tick()
    {
        if(state == STATE.IDLE)
        {

        }
        else if (state == STATE.RUN)
        {
            elapsedTime += Time.deltaTime;
            if (elapsedTime >= duration)
            {
                state = STATE.FINISHED;
            }
        }
        else if (state == STATE.FINISHED)
        {

        }
        else
        {
            Debug.Log("Error");
        }
    }
    public void Go()
    {
        elapsedTime = 0;
        state = STATE.RUN;
    }
}

利用MyButton得到状态：

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

public class MyButton {
    /// <summary>
    /// 三种状态（缺省为false）
    /// </summary>
    public bool IsPressing = false;
    public bool OnPressed = false;
    public bool OnReleased = false;
    public bool IsExtending = false;

    public float extendingDuration = 0.15f;

    private bool curState = false;      //目前的状态
    private bool lastState = false;     //前一次状态

    private MyTimer extTimer = new MyTimer();

    public void Tick(bool input)
    {
       // StartTimer(extTimer, 1.0f);
        extTimer.Tick();


        curState = input;

        IsPressing = curState;

        OnPressed = false;
        OnReleased = false;
        if(curState != lastState)
        {
            if(curState ==true )
            {
                OnPressed = true;
              
            }
            else
            {
                OnReleased = true;
                StartTimer(extTimer, extendingDuration);
            }
        }
        lastState = curState;
        if (extTimer.state == MyTimer.STATE.RUN)
        {
            IsExtending = true;
        }
        else
        {
            IsExtending = false;
        }


    }
    private void  StartTimer(MyTimer timer,float duration)
    {
        timer.duration = duration;
        timer.Go();
    }
}

最后在joystick里面显示出来：

        //print(buttonA.IsExtending);//延长的时间
        //print(buttonA.IsExtending || buttonA.IsPressing);//按键的时间加延长的时间为true
        print(buttonA.IsExtending&&buttonA.OnPressed );

这样首先实现了double trigger判断。