Unity 实现单击、双击、长按功能按钮

话不多说，先上代码

using System; using UnityEngine; using UnityEngine.EventSystems; using UnityEngine.UI;

public class LTButton : Button { private enum EnumExButtonState { ///

空

None,

/// <summary>鼠标按下</summary>
    PointerDown,

    /// <summary>鼠标按下</summary>
    PointerUp,

    /// <summary>单击</summary>
    Click,

    /// <summary>双击</summary>
    DoubleClick,

    /// <summary>长按开始</summary>
    PressBegin,

    /// <summary>长按</summary>
    Press,

    /// <summary>长按结束</summary>
    PressEnd,
}

/// <summary>按钮状态</summary>
private EnumExButtonState mButtonState = EnumExButtonState.None;

/// <summary>鼠标按下时间</summary>
private float mPointerDownTime = 0.0f;

[SerializeField]
private float mDoubleClickInterval = 0.2f;

[SerializeField]
private float mPressBeginTime = 0.3f;

[SerializeField]
private float mPressIntervalTime = 0.2f;

/// <summary>长按缓存时间</summary>
private float mPressCacheTime = 0f;

public Action OnClick { get; set; }
public Action OnDoubleClick { get; set; }
public Action OnPressBegin { get; set; }
public Action OnPress { get; set; }
public Action OnPressEnd { get; set; }

public override void OnPointerDown(PointerEventData eventData)
{
    base.OnPointerDown(eventData);

    if (OnDoubleClick != null)
    {
        if (mButtonState == EnumExButtonState.None)
        {
            mButtonState = EnumExButtonState.PointerDown;
            mPointerDownTime = Time.time;
        }
        else if (mButtonState == EnumExButtonState.PointerUp)
        {
            if (Time.time - mPointerDownTime < mDoubleClickInterval)
            {
                mButtonState = EnumExButtonState.DoubleClick;
                return;
            }
            else
            {
                mButtonState = EnumExButtonState.PointerDown;
                mPointerDownTime = Time.time;
            }
        }
    }

    if (OnPressBegin != null || OnPress != null || OnPressEnd != null)
    {
        if (mButtonState != EnumExButtonState.DoubleClick)
        {
            mButtonState = EnumExButtonState.PointerDown;
            mPointerDownTime = Time.time;
        }
    }

    if (OnClick != null)
    {
        mButtonState = EnumExButtonState.PointerDown;
    }
}

public override void OnPointerUp(PointerEventData eventData)
{
    base.OnPointerUp(eventData);

    if (OnDoubleClick != null)
    {
        if (mButtonState == EnumExButtonState.PointerDown)
        {
            mButtonState = EnumExButtonState.PointerUp;
            return;
        }
        else if (mButtonState == EnumExButtonState.DoubleClick)
        {
            return;
        }
    }

    if (OnPressBegin != null || OnPress != null || OnPressEnd != null)
    {
        if (mButtonState == EnumExButtonState.Press)
        {
            mButtonState = EnumExButtonState.PressEnd;
            return;
        }
    }

    if (OnClick != null)
    {
        if (mButtonState == EnumExButtonState.PointerDown)
            mButtonState = EnumExButtonState.PointerUp;
    }
}

private void Update()
{
    ProcessUpdate();
    ResponseButtonState();
}

private void ProcessUpdate()
{
    if (OnDoubleClick != null) { }

    if (OnPressBegin != null || OnPress != null || OnPressEnd != null)
    {
        if (mButtonState == EnumExButtonState.PointerDown)
        {
            if (Time.time - mPointerDownTime > mPressBeginTime)
            {
                mButtonState = EnumExButtonState.PressBegin;
                mPressCacheTime = 0f;
                return;
            }
        }
    }

    if (OnClick != null)
    {
        if (mButtonState == EnumExButtonState.PointerUp)
        {
            if (OnDoubleClick != null)
            {
                if (Time.time - mPointerDownTime > mDoubleClickInterval)
                    mButtonState = EnumExButtonState.Click;
            }
            else
            {
                mButtonState = EnumExButtonState.Click;
            }
        }
    }
}

private void ResponseButtonState()
{
    switch (mButtonState)
    {
        case EnumExButtonState.None:
            break;

        case EnumExButtonState.Click:
            OnClick?.Invoke();
            mButtonState = EnumExButtonState.None;
            break;

        case EnumExButtonState.DoubleClick:
            OnDoubleClick?.Invoke();
            mButtonState = EnumExButtonState.None;
            break;

        case EnumExButtonState.PressBegin:
            OnPressBegin?.Invoke();
            mButtonState = EnumExButtonState.Press;
            break;

        case EnumExButtonState.Press:
            {
                mPressCacheTime += Time.deltaTime;
                if (mPressCacheTime >= mPressIntervalTime)
                {
                    mPressCacheTime = mPressCacheTime - mPressIntervalTime;
                    OnPress?.Invoke();
                }
                break;
            }
        case EnumExButtonState.PressEnd:
            OnPressEnd?.Invoke();
            mButtonState = EnumExButtonState.None;
            break;

        default:
            break;
    }
}

}

整体思路就是集成子Uibutton组件并重写OnPointerDown事件来实现，代码逻辑简单，可直接使用