Unity 使用Scroll View滑动栏实现缩放选择效果

工程下载

链接：https://pan.baidu.com/s/1AQSrZJjOpHZ4wdMonvBkig
提取码：sybj

效果图

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class Move : MonoBehaviour
{
   public Scrollbar bar;
   public GameObject[] itemlist;
   private float distance = 0;

   public int selectIndex = 0;
   public int lastSelectIndex = 0;
   private float time = 0;
   private float target = 0;

   // Use this for initialization
   void Start()
   {
       Info();
   }

   public void Info()
   {
       distance = 1.0f / ((float)itemlist.Length - 1);
       for (int i = 0; i < itemlist.Length; i++)
       {
           itemlist[i].GetComponent<Item>().x = distance * i;
       }
       int value = (int)(bar.value / distance + 0.5f);
       for (int i = 0; i < itemlist.Length; i++)
       {
           if (i > value)
               itemlist[i].transform.SetSiblingIndex(itemlist.Length - 1 - i + value);
           else if (i < value)
               itemlist[i].transform.SetSiblingIndex(i);
           else if (i == value)
               itemlist[i].transform.SetSiblingIndex(itemlist.Length - 1);
       }
   }

   public void PointUp()
   {
       int value = (int)(bar.value / distance + 0.5f);

       selectIndex = value;
       target = distance * value;
       itemlist[selectIndex].transform.SetSiblingIndex(itemlist.Length - 1);

       time = 0;
       lastSelectIndex = selectIndex;
   }

   // Update is called once per frame
   void Update()
   {
       if (Input.GetMouseButtonUp(0))
       {
           PointUp();
       }

       if (Input.GetMouseButton(0))
       {
           int value = (int)(bar.value / distance + 0.5f);

           for (int i = 0; i < itemlist.Length; i++)
           {
               if (i > value)
                   itemlist[i].transform.SetSiblingIndex(itemlist.Length - 1 - i + value);
               else if (i < value)
                   itemlist[i].transform.SetSiblingIndex(i);
               else if (i == value)
                   itemlist[i].transform.SetSiblingIndex(itemlist.Length - 1);
           }
           time += Time.deltaTime;
           return;
       }

       if (target != bar.value)
       {
           if (bar.value < target)
               bar.value += Time.deltaTime / 5;
           if (bar.value >= target)
               bar.value -= Time.deltaTime / 5;

           if (Mathf.Abs(bar.value - target) < 0.01f)
           {
               bar.value = target;
           }
       }
   }

public GameObject Max;
public Image max_image;

   public void PointClick()
   {
       if (time < 0.5f && selectIndex == lastSelectIndex)
       {
           Max.SetActive(true);
           Debug.Log("selectIndex" + selectIndex);
           max_image.sprite = itemlist[selectIndex].GetComponent<Image>().sprite;
       }
   }

   public void OnClick_MaxCloseEvent()
   {
       Max.SetActive(false);
   }
}

通过Scrollbar.value滑动值判定滑动了几个位置，然后改变物体索引值达到缩放效果

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class Item : MonoBehaviour
{
public Scrollbar bar;
public float x;

   // Use this for initialization
   void Start()
   {

}

   // Update is called once per frame
   void Update()
   {
       transform.localPosition = new Vector3(-(bar.value - x) * 500, 0, 0);
       float scale = 1 - Mathf.Abs(bar.value - x) * 0.5f;
       transform.localScale = new Vector3(scale, scale, 1);
   }
}

Unity 使用Scroll View滑动栏实现缩放选择效果

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