Unity UI案例（长按按钮和双击按钮案例

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Unity中要实现自己得Button需要编写继承自UnityEngine的Button类，然后再重写按钮按下，抬起，和离开的方法（OnPointerDown，OnPointerUp，OnPointerExit），记录时间差就行了，具体实现看代码：

一：长按按钮实现：

代码语言：javascript复制

public class LongClickButton : Button {
    [Serializable]
    public class LongButtonEvent : UnityEvent { }
    [SerializeField]
    private LongButtonEvent _onLongButtonClick = new LongButtonEvent();
    public LongButtonEvent OnLongButtonClick
    {
        get
        {
            return _onLongButtonClick;
        }

        set
        {
            _onLongButtonClick = value;
        }
    }
    private DateTime m_FirstTime;
    private DateTime m_SecondTime;
    void ResetTime()
    {
        m_FirstTime = default(DateTime);
        m_SecondTime = default(DateTime);
    }
    void Press()
    {
        if (OnLongButtonClick != null)
            OnLongButtonClick.Invoke();
        else
            ResetTime();
    }
    public override void OnPointerDown(PointerEventData eventData)
    {
        base.OnPointerDown(eventData);
        if(m_FirstTime.Equals(default(DateTime)))
        {
            m_FirstTime = DateTime.Now;
        }
    }
    public override void OnPointerUp(PointerEventData eventData)
    {
        base.OnPointerUp(eventData);
        if(!m_FirstTime.Equals(default(DateTime)))
        {
            m_SecondTime = DateTime.Now;
        }
        if(!m_FirstTime.Equals(default(DateTime))&&!m_SecondTime.Equals(default(DateTime)))
        {
            var intervalTime = m_SecondTime - m_FirstTime;
            float milliTime = intervalTime.Seconds * 1000   intervalTime.Milliseconds;//毫秒
            if (milliTime > 600)
            {
                Press();
            }
            else
                ResetTime();
        }
    }
    public override void OnPointerExit(PointerEventData eventData)
    {
        base.OnPointerExit(eventData);
        ResetTime();
    }
}

调用： longButton.OnLongButtonClick.AddListener(() => { Debug.Log("LongButtonClick"); });

二.双击按钮实现

代码语言：javascript复制

public class DoubleClikeButton : Button
{

    [Serializable]
    public class DoubleClickEvent : UnityEvent { }
    [SerializeField]
    private DoubleClickEvent _onDoubleClick = new DoubleClickEvent();
    public DoubleClickEvent OnDoubleClick
    {
        get
        {
            return _onDoubleClick;
        }

        set
        {
            _onDoubleClick = value;
        }
    }
    private DateTime m_firstTime;
    private DateTime m_SecondTime;
    private void ResetTime()
    {
        m_firstTime = default(DateTime);
        m_SecondTime = default(DateTime);
    }
    private void Press()
    {
        if (OnDoubleClick != null)
            OnDoubleClick.Invoke();
        else
            ResetTime();
    }

    public override void OnPointerDown(PointerEventData eventData)
    {
        base.OnPointerDown(eventData);
        if (m_firstTime.Equals(default(DateTime)))
            m_firstTime = DateTime.Now;
        else
        {
            m_SecondTime = DateTime.Now;
        }
    }
    public override void OnPointerUp(PointerEventData eventData)
    {
        base.OnPointerUp(eventData);
        if (!m_firstTime.Equals(default(DateTime)) && !m_SecondTime.Equals(default(DateTime)))
        {
            var intervalTime = m_SecondTime - m_firstTime;
            float milliTime = intervalTime.Seconds * 1000   intervalTime.Milliseconds;
            if (milliTime < 400)
            {
                Press();
            }
            else
                ResetTime();
        }

    }
    public override void OnPointerExit(PointerEventData eventData)
    {
        base.OnPointerExit(eventData);
        ResetTime();
    }
}

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