UGUI ScrollRect实现带按钮翻页支持拖拽

本文实例为大家分享了ugui scrollrect带按钮翻页支持拖拽的具体代码，供大家参考，具体内容如下

using unityengine;
using system.collections;
using unityengine.ui;
using unityengine.eventsystems;
using system.collections.generic;
using system;
/// <summary>
/// 略知csharp 
/// </summary>
public class scrollrecthelper : monobehaviour, ibegindraghandler, ienddraghandler
{
 
 public float smooting = 5;    //滑动速度
 public list<gameobject> listitem;   //scrollview item 
 public int pagecount = 3;    //每页显示的项目
 
 scrollrect srect;
 float pageindex;     //总页数
 bool isdrag = false;    //是否拖拽结束
 list<float> listpagevalue = new list<float> { 0 }; //总页数索引比列 0-1
 float targetpos = 0;    //滑动的目标位置
 float nowindex = 0;     //当前位置索引
 
 void awake()
 {
 srect = getcomponent<scrollrect>();
 listpagevalueinit();
 }
 
 //每页比例
 void listpagevalueinit()
 {
 pageindex = (listitem.count / pagecount)-1;
 if (listitem != null && listitem.count != 0)
 {
  for (float i = 1; i <= pageindex; i++)
  {
  listpagevalue.add((i / pageindex));
  }
 }
 }
 
 void update()
 {
 if (!isdrag)
  srect.horizontalnormalizedposition = mathf.lerp(srect.horizontalnormalizedposition, targetpos, time.deltatime * smooting);
 }
 /// <summary>
 /// 拖动开始
 /// </summary>
 /// <param name="eventdata"></param>
 public void onbegindrag(pointereventdata eventdata)
 {
 isdrag = true;
 }
 /// <summary>
 /// 拖拽结束
 /// </summary>
 /// <param name="eventdata"></param>
 public void onenddrag(pointereventdata eventdata)
 {
 isdrag = false;
 var temppos = srect.horizontalnormalizedposition; //获取拖动的值
 var index = 0;
 float offset = mathf.abs(listpagevalue[index] - temppos); //拖动的绝对值
 for (int i = 1; i < listpagevalue.count; i++)
 {
  float temp = mathf.abs(temppos - listpagevalue[i]);
  if (temp < offset)
  {
  index = i;
  offset = temp;
  }
 }
 targetpos = listpagevalue[index];
 nowindex = index;
 }
 
 public void btnleftgo()
 {
 nowindex = mathf.clamp(nowindex - 1, 0, pageindex);
 targetpos = listpagevalue[convert.toint32(nowindex)];
 }
 
 public void btnrightgo()
 {
 nowindex = mathf.clamp(nowindex + 1, 0, pageindex);
 targetpos = listpagevalue[convert.toint32(nowindex)];
 
 }
}

demo 下载地址

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。