NGUI翻页

  1 using UnityEngine;
  2 using System.Collections;
  3 
  4 public class TurnPage : MonoBehaviour
  5 {
  6     public UIButton btn_leftOrTop;
  7     public UIButton btn_rightOrButtom;
  8     public int m_RowOrLineNum; // 当前界面显示的行数或者列数
  9     public float strength = 8f;
 10 
 11     private UIScrollView m_scrollView;
 12     private Vector2 m_initialPosition; // scroll初始位置
 13     private UIGrid grid;
 14     private Bounds itemBounds;
 15 
 16     private float allRowsNum; // 总共有多少列(行)
 17     private float allPagesNum; // 总共有多少页
 18     private float pageOffset; // 每页的偏移量
 19 
 20     private void Start()
 21     {
 22         UIManager.SetButtonEventHandler(btn_leftOrTop.gameObject, EnumButtonEvent.OnClick, OnTurnLeftOrTop, 0, 0);
 23         UIManager.SetButtonEventHandler(btn_rightOrButtom.gameObject, EnumButtonEvent.OnClick, OnTurnRightOrButtom, 0, 0);
 24         btn_leftOrTop.enabled = false;
 25         btn_rightOrButtom.enabled = false;
 26     }
 27     public IEnumerator DelayInit()
 28     {
 29         yield return new WaitForSeconds(0.5f);
 30         OnInit();
 31     }
 32     public void OnInit()
 33     {
 34         m_initialPosition = transform.localPosition; // 记录开始位置
 35         m_scrollView = this.GetComponent<UIScrollView>();// 取到scroll
 36 
 37         // 处理UIGrid
 38         grid = this.GetComponentInChildren<UIGrid>();
 39         if (grid == null)
 40             return;
 41 
 42         float cutSize = 0;
 43         switch (m_scrollView.movement)
 44         {
 45             case UIScrollView.Movement.Horizontal:
 46                 // 计算总共有多少列
 47                 itemBounds = NGUIMath.CalculateRelativeWidgetBounds(grid.GetChild(1).gameObject.transform); // 默认取第一个的子物体
 48                 cutSize = grid.cellWidth - itemBounds.size.x;
 49                 allRowsNum = (m_scrollView.bounds.size.x + cutSize) / grid.cellWidth;
 50                 allPagesNum = allRowsNum / m_RowOrLineNum;// 计算总共有多少页
 51                 pageOffset = (m_scrollView.bounds.size.x + cutSize) / allRowsNum * m_RowOrLineNum; // 计算每页的偏移量
 52                 break;
 53             case UIScrollView.Movement.Vertical:
 54                 // 计算总共有多少行
 55                 itemBounds = NGUIMath.CalculateRelativeWidgetBounds(grid.GetChild(1).gameObject.transform); // 默认取第一个的子物体
 56                 cutSize = grid.cellHeight - itemBounds.size.y;
 57                 allRowsNum = (m_scrollView.bounds.size.y + cutSize) / grid.cellHeight;
 58                 allPagesNum = allRowsNum / m_RowOrLineNum;// 计算总共有多少页
 59                 pageOffset = (m_scrollView.bounds.size.y + cutSize) / allRowsNum * m_RowOrLineNum; // 计算每页的偏移量
 60                 break;
 61             default:
 62                 break;
 63         }
 64 
 65         btn_leftOrTop.enabled = true;
 66         btn_rightOrButtom.enabled = true;
 67     }
 68 
 69     private void OnTurnLeftOrTop(ButtonScript obj, object args, int param1, int param2)
 70     {
 71         Turn(false);
 72     }
 73     private void OnTurnRightOrButtom(ButtonScript obj, object args, int param1, int param2)
 74     {
 75         Turn(true);
 76     }
 77     private void Turn(bool forward)
 78     {
 79         float currPage;
 80         float tempAllPage;
 81         switch (m_scrollView.movement)
 82         {
 83             case UIScrollView.Movement.Horizontal:
 84                 currPage = GetCurrPage(forward, transform.localPosition.x);
 85                 tempAllPage = allPagesNum;
 86                 tempAllPage -= currPage;
 87 
 88                 if (tempAllPage < 1)
 89                 {
 90                     float movedX = (allRowsNum - m_RowOrLineNum) * (grid.cellWidth);
 91                     Vector3 toPositionX = new Vector3(-movedX, m_scrollView.transform.localPosition.y, m_scrollView.transform.localPosition.z);
 92                     SpringPanel.Begin(m_scrollView.panel.cachedGameObject, toPositionX, strength);
 93                     m_scrollView.panel.clipOffset.Set(-transform.localPosition.x, m_scrollView.panel.clipOffset.y);
 94                 }
 95                 else
 96                 {
 97                     float movedX = currPage * grid.cellWidth * m_RowOrLineNum;
 98                     Vector3 toPositionX = new Vector3(-movedX, m_scrollView.transform.localPosition.y, m_scrollView.transform.localPosition.z);
 99                     SpringPanel.Begin(m_scrollView.panel.cachedGameObject, toPositionX, strength);
100                     m_scrollView.panel.clipOffset.Set(-transform.localPosition.x, m_scrollView.panel.clipOffset.y);
101                 }
102 
103                 break;
104             case UIScrollView.Movement.Vertical:
105                 currPage = GetCurrPage(forward, transform.localPosition.y);
106                 tempAllPage = allPagesNum;
107                 tempAllPage -= currPage;
108                 if (tempAllPage < 1)
109                 {
110                     float movedY = (allRowsNum - m_RowOrLineNum) * (grid.cellHeight);
111                     Vector3 toPositionY = new Vector3(m_scrollView.transform.localPosition.x, movedY, m_scrollView.transform.localPosition.z);
112                     SpringPanel.Begin(m_scrollView.panel.cachedGameObject, toPositionY, strength);
113                     m_scrollView.panel.clipOffset.Set(transform.localPosition.x, -m_scrollView.panel.clipOffset.y);
114                 }
115                 else
116                 {
117                     float movedY = currPage * grid.cellHeight * m_RowOrLineNum;
118                     Vector3 toPositionY = new Vector3(m_scrollView.transform.localPosition.x, movedY, m_scrollView.transform.localPosition.z);
119                     SpringPanel.Begin(m_scrollView.panel.cachedGameObject, toPositionY, strength);
120                     m_scrollView.panel.clipOffset.Set(transform.localPosition.x, -m_scrollView.panel.clipOffset.y);
121                 }
122 
123                 break;
124         }
125 
126 
127     }
128     private float GetCurrPage(bool forward, float positionValue)
129     {
130         float currPageNum = Mathf.Abs(positionValue / pageOffset);
131 
132         if (forward)
133             currPageNum += 1;
134         else
135         {
136             currPageNum -= 1;
137             if (currPageNum < 0)
138                 currPageNum = 0;
139         }
140         return currPageNum;
141     }
142     private void OnDestroy()
143     {
144         UIManager.RemoveButtonEventHandler(btn_leftOrTop.gameObject, EnumButtonEvent.OnClick);
145         UIManager.RemoveButtonEventHandler(btn_rightOrButtom.gameObject, EnumButtonEvent.OnClick);
146     }
147 }