Unity实现滑页嵌套（解决ScrollRect嵌套冲突问题）
简介
由于项目需要+有网友咨询，所以做了个横向滑页+某一横向滑页中有竖向滑页的demo，实现有点绕弯子，但基本功能还是比较完善，发上来共享一下。
效果
思路
第一步的思路是自己判断触屏拖动位置，然后控制界面横向或者纵向滑动。
然后，
由于UGUI组件重叠时会屏蔽事件
比如Button会屏蔽掉PointerDown
（PS：当然也可以采取继承UGUI组件的方式释放屏蔽事件，
这里对UGUI源码不熟，采取自己写一个事件分发器方便一点）
项目配置
这里就不赘述咯，我的前一篇blog有详细配置说明：
1.首先建立两个ScrollRect
2.分别给两个ScrollRect配置格子的ScrollBar，然后关掉以下设置
3.在最外层的ScrollRect配置ScrollControl代码
（PS：代码后续给出）
4.配置InputControl
（PS：新建一个Gameobjct就可以咯，也可以挂在已有物体上）
5.运行，检查效果...
代码
代码写的比较急，很多不规范的地方，使用者请看懂逻辑之后自行重构，直接使用者有坑勿怪
InputControl
using UnityEngine;
public delegate void MouseDownEvent(Vector2 mousePosition);
public delegate void MouseUpEvent(Vector2 mousePosition);
public delegate void MouseDragEvent(Vector2 dragVector);
public delegate void MouseClickEvent(Vector2 mousePosition);
public class InputControl : MonoBehaviour
{
private static InputControl mInstance;
/// <summary>
/// 逗比单例模式
/// </summary>
public static InputControl Instance
{
get
{
return mInstance;
}
}
private bool isPress;
private bool isClick;
private bool tempPress;
private Vector2 oldMousePosition;
private Vector2 tempMousePosition;
public event MouseDownEvent EVENT_MOUSE_DOWN;
public event MouseUpEvent EVENT_MOUSE_UP;
public event MouseDragEvent EVENT_MOUSE_DRAG;
public event MouseClickEvent EVENT_MOUSE_CLICK;
/// <summary>
/// 拖动起始判断参数，可自行更改
/// </summary>
public const float JUDGE_DISTANCE = 1F;
void Awake()
{
mInstance = this;
//以下代码可优化
EVENT_MOUSE_DOWN += AvoidEmpty;
EVENT_MOUSE_UP += AvoidEmpty;
EVENT_MOUSE_DRAG += AvoidEmpty;
EVENT_MOUSE_CLICK += AvoidEmpty;
}
void Start()
{
isPress = false;
isClick = false;
}
/// <summary>
/// 防空保护函数，无用处，可自行优化
/// </summary>
/// <param name="noUse"></param>
private void AvoidEmpty(Vector2 noUse) { }
void Update()
{
tempPress = Input.GetMouseButton(0);
tempMousePosition = Input.mousePosition;
// 两次状态不同，触发点击和抬起事件
if (tempPress != isPress)
{
// 按下事件
if (tempPress)
{
isClick = true;
EVENT_MOUSE_DOWN(tempMousePosition);
}
// 抬起事件
else
{
EVENT_MOUSE_UP(tempMousePosition);
// 点击事件
if (isClick)
{
EVENT_MOUSE_CLICK(tempMousePosition);
}
isClick = false;
}
}
// 按下的过程中发生了移动，发生事件变化
else if (isClick && JudgeMove(oldMousePosition, tempMousePosition))
{
isClick = false;
}
// 拖动事件
else if (tempPress && !isClick)
{
EVENT_MOUSE_DRAG(tempMousePosition - oldMousePosition);
}
isPress = tempPress;
oldMousePosition = tempMousePosition;
}
/// <summary>
/// 判断是否超出静止范围，用static速度更快
/// </summary>
/// <param name="p1"></param>
/// <param name="p2"></param>
/// <returns></returns>
private static bool JudgeMove(Vector2 p1, Vector2 p2)
{
return Mathf.Abs(p1.x - p2.x) > JUDGE_DISTANCE || Mathf.Abs(p1.y - p2.y) > JUDGE_DISTANCE;
}
}
ScrollControl
using UnityEngine;
using UnityEngine.UI;
public class ScrollControl : MonoBehaviour
{
/// <summary>
/// 横向滚动条
/// </summary>
public Scrollbar m_HScrollBar;
/// <summary>
/// 竖向滚动条
/// </summary>
public Scrollbar[] m_VScrollBars;
/// <summary>
/// 有竖向滚动的页面
/// </summary>
public int[] m_VScrollIndexs;
/// <summary>
/// 页面个数
/// </summary>
public int m_Num;
/// <summary>
/// 设置移动超过多少百分比之后向下翻页
/// </summary>
public float m_NextLimit;
/// <summary>
/// 滑动敏感值
/// </summary>
public float m_Sensitive;
/// <summary>
/// 鼠标上一次的位置
/// </summary>
private Vector3 mOldPosition;
/// <summary>
/// 记录上一次的value
/// </summary>
private float mOldValue;
private float mTargetPosition = 0.5f;
private int mCurrentIndex = 3;
private int mTargetIndex = 3;
/// <summary>
/// 是否可以移动
/// </summary>
private bool mCanMove = false;
/// <summary>
/// 初始移动速度
/// </summary>
private float mMoveSpeed;
/// <summary>
/// 平滑移动参数
/// </summary>
private const float SMOOTH_TIME = 0.2F;
private float mDragParam = 0;
private float mPageWidth = 0;
/// <summary>
/// 是否需要进行滑动方向判定
/// </summary>
private bool mNeedCaculate = false;
/// <summary>
/// 是否进行竖向滚动
/// </summary>
private bool mIsScollV = false;
/// <summary>
/// 竖向临时滚动条
/// </summary>
private Scrollbar mVScrollBar;
public void SetNextIndex(int pIndex)
{
mTargetIndex = pIndex;
mTargetPosition = (mTargetIndex - 1) * mPageWidth;
mIsScollV = false;
mCanMove = true;
}
private void OnPointerDown(Vector2 mousePosition)
{
// 记录当前value
mOldValue = m_HScrollBar.value;
mOldPosition = Input.mousePosition;
// mCanMove = false;
mCurrentIndex = GetCurrentIndex(mOldValue);
// 判断当前是否在可竖向滑动的页面上
for (int i = 0; i < m_VScrollIndexs.Length; ++i)
{
if (m_VScrollIndexs[i] == mCurrentIndex)
{
mNeedCaculate = true;
mVScrollBar = m_VScrollBars[i];
break;
}
}
}
private void OnDrag(Vector2 mousePosition)
{
Vector2 dragVector = Input.mousePosition - mOldPosition;
if (mNeedCaculate)
{
mNeedCaculate = false;
if (Mathf.Abs(dragVector.x) > Mathf.Abs(dragVector.y))
{
mIsScollV = false;
}
else
{
mIsScollV = true;
}
}
DragScreen(dragVector);
mOldPosition = Input.mousePosition;
}
private void OnPointerUp(Vector2 mousePosition)
{
Vector2 dragVector = Input.mousePosition - mOldPosition;
DragScreen(dragVector);
mOldPosition = Input.mousePosition;
float valueOffset = m_HScrollBar.value - mOldValue;
if (Mathf.Abs((valueOffset) / mPageWidth) > m_NextLimit)
{
mTargetIndex += valueOffset > 0 ? 1 : -1;
mTargetPosition = (mTargetIndex - 1) * mPageWidth;
}
mCanMove = true;
}
private int GetCurrentIndex(float pCurrentValue)
{
return Mathf.RoundToInt(pCurrentValue / mPageWidth + 1);
}
private void DragScreen(Vector2 pDragVector)
{
if (mIsScollV)
{
float oldValue = mVScrollBar.value;
mVScrollBar.value -= pDragVector.y / Screen.height * mVScrollBar.size;
mMoveSpeed = mVScrollBar.value - oldValue;
}
else
{
float oldValue = m_HScrollBar.value;
m_HScrollBar.value -= pDragVector.x / Screen.width * mDragParam;
mMoveSpeed = m_HScrollBar.value - oldValue;
}
}
void Awake()
{
if (m_Num <= 1)
{
Debug.LogError("参数错误:页面个数不对");
}
mDragParam = 1f / (m_Num - 1) * m_Sensitive;
mPageWidth = 1f / (m_Num - 1);
mCurrentIndex = GetCurrentIndex(m_HScrollBar.value);
mTargetIndex = mCurrentIndex;
}
void Start()
{
InputControl.Instance.EVENT_MOUSE_DOWN += OnPointerDown;
InputControl.Instance.EVENT_MOUSE_UP += OnPointerUp;
InputControl.Instance.EVENT_MOUSE_DRAG += OnDrag;
}
void OnDestory()
{
InputControl.Instance.EVENT_MOUSE_DOWN -= OnPointerDown;
InputControl.Instance.EVENT_MOUSE_UP -= OnPointerUp;
InputControl.Instance.EVENT_MOUSE_DRAG -= OnDrag;
}
void Update()
{
if (mCanMove)
{
if (mIsScollV)
{
mVScrollBar.value += mMoveSpeed;
float absValue = Mathf.Abs(mMoveSpeed);
absValue -= 0.001f;
if (absValue <= 0)
{
mCanMove = false;
}
else
{
mMoveSpeed = mMoveSpeed > 0 ? absValue : -absValue;
}
}
else
{
if (Mathf.Abs(m_HScrollBar.value - mTargetPosition) < 0.01f)
{
m_HScrollBar.value = mTargetPosition;
mCurrentIndex = mTargetIndex;
mCanMove = false;
return;
}
m_HScrollBar.value = Mathf.SmoothDamp(m_HScrollBar.value, mTargetPosition, ref mMoveSpeed, SMOOTH_TIME);
}
}
}
}
总结
目前来看效果还可以，两种滑动无干扰，有简单的阻尼滑动效果，滑动分页界限可以设置
其他若有什么问题，欢迎留言
